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A note on two Panama mosquitoes _Diptera_ Culicidae_ by huanghengdong

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             A NOTE            OK TWO PANAMA MOSQUITOS
                                 (Diptera, Culicidcce)
                     HARRISOqX.   G. DTAR*   AND   C.             f
                                                        S. LUtlLO&‘

      TN THE collections made by Army Surgeons and received & the
Army Medical Museum during the last few months have been some very
interesting specimens. A new Culex from Panama (C. dysmathes,
Ins. Ins. Mens., ix, 46, 1921), was published lately, and now we have
further material of especial interest.
      Hitherto no male has been known in the Sabethid gemIs Prosopolepis
Lutz, though besides the specimens on which the genus was founded
there have been received hand catches from Culebra, Empire, and
Camp Gaillard containing a number of females. Among those taken
at Culebra is a single male the characters of which are given below.
      Four species have been described in the genus, confz~sus   Lutz (Im-
prensa Med., 31.2, 1905) and flui Bonne-Wefster              & Bonne (Ins.
Ins. &lens., vii, 169, 1920), with the scales on the clypez white and
conf%nedto the front margin, and jocosu Dyar & Knab (Proc. U. S.
Nat. i&s., xxxv, 64, 1908) and prolepidis Dyar 8.z Knab (Ins. Ins.
Mens., vii, 1, 1919), with the scales on the clypeus black and covering
the whole surface. The specimen before us belongs to the latter group.
In jocose,,known in a single female from Caldera Island, Panama, the
size is larger, the pleura and venter of abdomen contrastingly pale,
 the prothoracic lobes with a little of blue tint, the m-hite eye-margins
 not reaching the vertex of the head. In prolepidis, described from
 Culebra, Canal Zone, the size is smaller, the pleura and venter darker,
 the prothoracic lobes without blue tint, the white eye-margins reaching
 the vertex. The specimens before us &respond tith the latter species
 in both the characteristics given and in the 1ocalil;y.
      The single male of Prosopolepis prolepidis D. & K. before us is too
 much damaged for description. The palpi are short as in the female,
but the antennae, unfortunately, are lost. The male hypopygium
exhibits the characters of the Sabethes group, cotiming          an opinion
previously expressed (Dyar, H. G., Ins. Ins. Metis., vii, 142, 1919).
      Hypopygium (Fig. 1). Side piece conical, constricted outwardly,
hirsute along the margin and with three long hairs below. Clasper
 filrcate, one limb slender, the other broadly flattened, minutely haired
 outwardly, mith a slender inner arm, bearing a minute seta at its tip,
 Tenth sternites simple, dentate at tip, Aedoeagus invisible. Xnth
 tergites bar-like, each. with four large, stzongly flattened appendages.
  ~~
     *U. S.Kational Musetim.
  T Army   Medical   Museum.

                                                                      1
    The genus does not differ essentially from CZeobonneu Dyar (Ins.
Ins. Mew., vii, 134, 1919).
    The life histories and Iarvae of the four species of Prosqwlepis
are unknown, but Mr. Shropshire, referring to this speeies, writes:
“It rnaJ* be a specimen of a mosquito which breeds in cup-like shells
which enclose the blooms of the seed palm. These shells remain on




                Fig.   1.   ProsopoIepis   prolepidis-Dyar   and Knab.


the tree midway up, and readily catch and hold water. I have found
them (some larvae) once breeding in these shells, and have been en-
deavoring to collect some for you.” This is of course merely a sugges-
tion, and must await confirmation before it is considered seriously.
No statement was made as to breeding places of the collection in which
this male was taken, and as it was a “hand-catch,” and contained
Wyemyia     (Decamyia) onidus, Wgeomyia pandora, Joblotia digitatus,
                            Note on Two Panama Mosquitos                              3

           MansMia titillans, sogbeMycetophilidae, and Hemiptwa, no conclusion
           can be drawn.                                                                        8            0
              Length; unknown, the genitalia were removed before any measure-                            *
           ment was taken.
              Habitat; Culebra, but the species is taken in other localities in the
           Canal Zone.
              Taken; December 13, 1380, in a collection with 14 females. Also
           at Culebra, November 12, 18, December 30, Empire, September 26,
           December 31; Camp Gaillard, January 20. This male and five females
           have been deposited at the U. S. National Museum.
              We have also a male Haemagogus of an apparently new species
           taken at Coroxal.
                           Haemagogus&&yromeris,      new species
               (Male.)    Head black, covered with flat brilliant blue scales, and a
                                      a
           few white ones on the side which in some lights appear to extend as a
           narrow line around the eyes; a few heavy black bristles around, and
           two projecting forward between the eyes. Antennae light with black
.‘   _..
           verticels and a black band at the base of each whorl; the distal joints          .
           elongated as usual, but unusually hairy. Proboscis dark, long and
           slender, black-scaled, with purplish reflections, a small tuft of black
           hairs at the very base on the ventral aspect; the labellae small, with
           many short hairs. Palpi short, slender, black. Clypeus black, nude,
           and shining. Eyes black.
               Thorax: prothoracic lobes rather closely approximate dorsally,
           collar-like, covered with brilliant blue flat scales and a few black bristles.
           Mesonotum black, covered with brilliant blue flat, elliptical scales, a
           few black bristles at the nape, and a bunch of long ones at the wing-
                                                                                                 /
           joint. Some white flat scales on the lateral margin just cephalad 0-n                ;;   :
           the wing-joint, apparently an extension of those on the pleura. Scutel-
           lum dark, covered with brilliant blue flat scales and long black bristles
           on each lobe. Metanotum brown with a few minute brown setae close
           to the caudad margin. Pleura black with many brilliant white scales.
               Abdomen black, with dark scales showing as brilliant blue, purplish
           or even reddish, depending on the light, and large silvery white lateral
           spots which extend on some segments to form white bands. The first
           segment has a median spot of brilliant blue, and lateral spots of silvery
           white scales. The abdominal marking is very irregular, and the scales
           so influenced by the direction of the light that it is difEcult to say where
           the white begins or ends. Apparently the fifth and sixth segments are
           basally white banded, but on the more proximal segments the bands
           often appear to be in the middle of the segment; the seventh segment
           has a white spot, and the eighth is dark. The ventral marking is quite
4                The Military     Swgeon-June,          1921

as irregular, the dark scales changing from brown to blue, purplish and
reddish, and the silvery white usually forming basal bands except on
the distal segments which arc dark. The eighth segment is very hairy.
    Legs: in some specimens the coxae are heavily white scaled and
all the trochanters are light. The femora are white at the bases, more
marked on the mid-legs, and extending more than half the length of the
femur on the hind legs, otherwise the legs are brown-scaled, with blue
to purple iridescence. The scales seem somewhat roughened and there
are tufts of scales at the apices of some of the joints.
    Claw formula 1.0-1.0-0.0.
    Wing smoky, brown-scaled. First submarginal cell much longer
and narrower than the second posterior, the petiole a little shorter than
the cell (Xi-20), that of the second posterior cell twice as long as the
cell; the posterior cross vein more than twice its length from the mid-
cross vein. Halteres with dark stem and silvery white knob.
    Length: about 3.5 mm. without proboscis, proboscis nearly R mm.
wing 2 mm.
    Habitat: Coronal, C. 2.
    Taketr October 27.
    De.:cribed from eight malts bred from larvae taken in a “container,”
The somatic markings are probably not thoroughly developed, and
suggest those on the females which.have been reported as H. equinm,
but the genitalia show characteristic differences.
    Hypopygium.      Side piece three times as long as wide, rounded at
tip; a small rounded setose lobe at the extreme base within; dense scales
toward the tip broad and rounded; a tuft of setae at tip. Clasper
moderate, enlarged outwardly, club-shaped, the spine inserted on one
side of the tip, pointed. Claspette with slender bent stem, its outer
                                                                e
portion enlarged into a rounded disk, with a single seta on one’ dge, the
disk minutely and sparsely ciliate;. filament broad, folded over on the
disk of stem, widely emarginate, forming on one side of the seta a slender
curved point, on the other less slender and with basal ribs.
    Types, eight males above referred to, four deposited in the U. S.
National Museum, type No. 24,333, and four retained in the Army
Medical Museum.
    Neither of these species belong to groups known to be connected
with disease, but the appearance in some numbers of what has been
considered a rather rare species, shows that we have much yet to learn
as to these Central American forms and it may easily be that additional
groups may be found to belong to the disease carriers. Careful and
extended   collections   are needed from   all our tropical   and subtropical
possessions.

								
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