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MISC. PUBLICATION 336, U. S. DEPT. OF AGRICULTURE 
Legs and wings black-sealed, speckled with white, but wings without 
well-defined areas of pale scales; first hind-tarsal segment dark, 
ringed with white in middle and at base; mesonotal scales dark, well 
sprinkled or frosted with white. A fairly large, blackish species, 
common in the Southern States ae ee TE SOFOPNOTGscOnfiuunis 
Costa and veins with well-defined areas of pale scales; tibia and first 
hind-tarsal segment largely pale-scaled, intermixed with dark and 
ringed withedarkiscalestapieallliy2ses esas ee 
Wing costa with a spot or area of pale scales at base and one at tip of 
subcostal vein, remainder of costa dark intermixed with white; anal 
vein with apical third dark-scaled, basal portion pale; wing fringe 
without pale spots. [Vein 3 with apical half and base dark-scaled, 
separated by a spot of pale scales; anterior fork of vein 4 and both 
forks of vein 5 pale centrally.] Rare southern species 
Psorophora discolor 
Apical half of costa with two prominent dark spots separated by a 
longer pale area; anal vein with pale scaling apically and basally, 
separated by a spot of dark scales at about apical third; pale fringe 
spots present opposite tips of all longitudinal veins. Recorded only 
from Arkansas in the Southeastern States____ Psorophora signipennis 
(29) Tarsal pale scaling restricted to one or more of last three seg- 
ments of hind tarsi. [Abdomen blue-black, the tergites with apical 
or jateral pale scaling; mesonotum with broad appressed pale scales, 
mixed with the dark scales or segregated at sides. ] 
Psorophora (Janthinosoma, except P. cyanescens) 
Tarsal pale scaling not restricted to apical segments of hind tarsi or 
tarsi entirely dark. [Dorsal segmental pale scaling of abdomen 
basal when present. | Ped ae Pipeayen ee ae ies eee 
Last two segments of hind tarsi white___ se I ip Ia ie re 
Fourth segment of hind tarsi white, at least dorsally, the fifth seg- 
ment dark. [Mesonotum dark in center, sides covered with broad 
white scales (fig. 12, G).] Usually rare. (Formerly known as 
Psorophora diserueians) — == 2=— es ee Psorophora varipes 
. Mesonotum covered with a mixture of brown and broad white seales. 
[Hind tibia and tarsus with erect scales; tarsal markings usually ex- 
tending onto tip of segment 3.] Common woods species, the white- 
footed mosquito. (Formerly known as Psorophora sayi) 
Psorophora ferox 
Mesonotum dark centrally, the sides covered with broad yellowish- 
white wSeales!? Rares. 2.) Si Bee eee ee Psorophora horrida 
Medium-sized species; mesonotum with a vestiture of narrow-curved 
or hairlike seales. [Metanotum without setae; abdominal tergites 
with pale bands or lateral spots on the segments. | ‘S 
Very small species, mesonotum covered with broad, appressed, dark 
scales; some of midtarsal segments white for entire length on one 
Side, but tarsal markings sometimes very indistinct; abdominal scales 
entirely dark dorsally and pale ventrally, the two colors meeting at 
side in a straight line. [Metanotum with a tuft of setae; dorso- 
central bristles of mesonotum absent; anterior pronotal lobes large, 
covered with flat scales; tip of abdomen blunt and more or less ex- 
panded; palpi short in both sexes. | a Genus Wyeomyia 
Tarsi ringed with white_____ Seat SD oe ee = es 
Tarsi not ringed with white i ee Ss! 
Mesonotum with delicate longitudinal lines of white or Silvery scales__ 
Mesonotum without such lines_____________ ast BR ES 
Thorax with four silvery lines, the outer pair “curved to form a lyre- 
shaped marking (fig. 12, 4); outstanding wing scales narrow and 
dark. [Hind tarsi with wide contrasting basal white bands, last two 
segments largely white; front and middle tarsi with narrow basal 
bands or spots on first two segments, the others dark.] The yeliow- 
fever INOSGMItOk >see Ae ee eee Se eee A edesnaegupit 
Mesonotum with four long silvery lines, and four short lines posteriorly, 
not in Shape of lyre (fig. 12, J); wing scales broad, mixed with 
white. [Hind tarsi with broad basal and apical bands; femora 
sprinkled with white; tibiae and proboscis with longitudinal lines of 
white scales; fourth segment of fore tarsi very short; wing with a 
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So. 
