508 

 eies, the male with whitish wrings; empodia distinct, 



.3. hyssijius. 



— Basal 2 Joints of flagellum in female closely fused, all flagellar joints 



in this sex with hairlike sensory organs ; yellowish species ; wrings 

 of male not milky ; empodia distinct 4 



4. Basal joint of fore tarsi about half as long as fore tibiae 5 



— Basal joint of fore tarsi nearly tw^o thirds as long as fore tibiffi 



(21 : 34) 4. aterrimus? 



5. Yellow species, thorax w4th brownish vittee or entirely yellow 



5. flavens. 



— Black species 6 



6. Base of wing whitish 6. flavihasis. 



— Thick veins at wing-base blackened 7. suhaterrimus. 



I. Camptocladius lasiops, n. sp. 



Male. — Black, slightly shining. Head black, antennal flagellum 

 and plumes fuscous. Legs black; tibise and tarsi fuscous. Wings 

 slightly grayish, veins brown. Halteres black or brown. Hairs on 

 body and legs fuscous. 



Eyes with short upright hairs between the facets ; palpi with 4 

 joints, the basal joint inserted in a distinct prominence; at least the 

 third flagellar joint with rather broad sensory organs, apical flagellar 

 joint about twice as long as preceding joints taken together. Pro- 

 notum narrow; central dorsal excision distinct. Hypopygium as in 

 Figure 8, Plate XXXVHI. Legs slender; fore tarsi with the hairs 

 very slightly longer than those on fore tibiae, basal joint slightly more 

 than half as long as fore tibia ( 15 : 28) ; mid and hind legs with mod- 

 erately long hairs; empodia as long as the claws, distinctly fringed. 

 Third vein ending at beginning of apical curve of wing, venation of 

 apical portion as in Figure 6, Plate XXXIX. 



Female. — Agrees with the male in coloration. 



Antenna as in Figure 13, Plate XXXH. The wing differs from 

 that of male in having the costa prolonged over a third of the dis- 

 tance from apex of third vein to apex of wing. 



Length, 1.5-2.75 mm. 



Type locality, Urbana, 111., November 19, 1914, taken near 

 house in city (C. A. Hart and J. R. Malloch). Paratypes from same 

 locality March 29 and in September and October, 19 14 (same collec- 

 tors). 



This species may belong to TricJwcladius, though the bisinuate 

 posterior branch of the cubitus and the place of occurrence of the 

 imagines would seem to indicate that the larva is terrestrial. 



