314 



I. FoRCiPOMYiA ciUPES Coquillett 



Ceratopogon cilipes Coquillett, Proc. Wash. Acad. Sei., Vol. 2, 1900, p. 397. 



Larva. — Length, 3-4 mm. White, the apical margins of mandi- 

 bles brownish. Lateral view as in Figure 3, Plate XVH, dorsal bristles 

 shaped as in Figure 4, Plate XVIH, dorso-lateral bristle fringed (PI. 

 XVin, Fig. 5), arrangement of other abdominal bristles as in Figure 

 3, (PI. XVII). Claws of pseudopods as in Figures 9 and 10, Plate 

 XVIII. 



Pupa. — Length, 2-2.25 mm. Pale yellowish, becoming brown as 

 the enclosed insect matures. Thorax with four long bristles in an an- 

 teriorly concave transverse line at center, very similar to those of Cera- 

 topogon fuscidiis, the pair anterior to them long, shaped as in Figure 

 6, Plate XVIII, posterior portion of thorax without bristles, only 

 slight raised portions indicating where they generally occur in other 

 species; respiratory organ of moderate size (PI. XVIII, Fig. 2), 

 slightly knobbed at apex. Abdomen with very weak armature, the 

 most distinct being a lateral row of bristles, as shown in Figure 3. 



Imago; Male. — Dark brown to black, shining. Antennal plumes 

 dark brown. Tarsi pale yellowish brown. Wings obscured by the 

 dense covering of blackish scalelike hairs ; a patch of pale hairs at base 

 and another at apex of third vein; beyond the last-mentioned patch, an 

 elongate patch of black hairs, covering the area between the upper 

 branch of the spurious vein and the margin of wing. Halteres pale 

 lemon-yellow. Thoracic and abdominal hairs varying from blackish 

 brown to pale brown. 



Eyes contiguous ; antenna with the apical four joints elongated 

 (PI. XXI, Fig. 6), joints 5-8 of flagellum with the incisions between 

 them poorly defined, the other joints as in Figure 11 ; antennal length 

 slightly exceeding that of head and thorax combined. Mesonotum 

 glossy black, the marginal hairs long; those on disc much shorter and 

 yellow ; scutellar margin with many very long hairs, the disc with short 

 hairs similar to those on mesonotum. Abdomen slender, the segments 

 with numerous long hairs which are noticeably longer than the seg- 

 ments; hypopygium as in Figure i, Plate XXI. Legs slender, covered 

 with long pale brownish hairs, those on hind tibiae more than half as 

 long as tibia, basal joint of hind tarsus very slightly shorter than sec- 

 ond; fourth and fifth joints of hind tarsus of nearly equal length; 

 claws small, equal ; empodium large. Wings narrow, densely hairy ; 

 costa to middle ; media forking just beyond cross vein. 



Female. — Similar to the male in color. Antennas not longer than 

 head and thorax coml^ned ; basal 8 flagellar joints slightly longer than 

 wide, the others slightly elongated, sensory organs as in Figure 5, 



