108 Bulletin of the Brooklyn Entomological Society Vol. XV 



twice length of second; arista blackish, plumose for not more 

 than half its length, the plumosity beneath much more scant 

 and about half as long as that above. Four rows of black cilia 

 behind eyes. Cheek vestiture long and hair-like. Gena with a 

 row of hairs near eye orbit and with several bristles below 

 near transverse impression: palpi dark. 



Chcetotaxy. — Lateral verticals absent ; vibrissse inserted 

 slightly above line of oral margin; about fourteen pairs of 

 frontals, the lower portions of rows widely divergent and ex- 

 tending slightly below base of second antennal segment, the 

 upper bristles (except last) almost as long or longer than 

 lower bristles and scarcely less stout ; greater ocellars about as 

 strong as uppermost frontals. 



Thorax. — Mesonotum clothed with long, slightly reclinate, 

 slender, almost bristle-like hairs ; vestiture of scutellum longer 

 and more erect. Spiracular hairs dark. Epaulets dark. 



Wings. — Slightly smoky. Bend of fourth vein a right angle ; 

 anterior cross-vein more basal than end of first longitudinal; 

 third vein with bristles ; costal spine absent ; section III of 

 costa longer than section V; calypters whitish, fringed with 

 white hair, except that those at fold are slightly darkened. 



Legs. — Dark. Anterior face of posterior femur with three 

 rows of bristles, those of lower row long, and slender ; pos- 

 terior face with ventral row of quite long slender, almost hair- 

 like bristles: tibia bearded, about same length as tarsus, ex- 

 cept for those near median dorsal ridge the anterior face with 

 a single bristle well toward distal end. Middle femur without 

 " comb " ; anterior and posterior ventral rows of bristles pres- 

 ent, former complete, latter present on distal third and prox- 

 imal to and slightly above it two long (sometimes three) stout 

 bristles: a few short ones proximally near median ridge; an- 

 terior face with a single bristle slightly distal to center; sub- 

 mesotibial bristle absent. 



ChcBtotaxy. — Bristles long and strong. Anterior acrostichals 

 absent, dorsocentrals present, inner presuturals absent ; three 

 pairs posterior dorsocentrals, sometimes a fourth very weak 

 pair behind the first, prescutellar acrostichals present, often 

 three intra-alars ; scutellar apicals present : three sternopleu- 

 rals ; lower sternopleura with bristles only. 



Abdomen. — Vestiture of nota hairy both above and beneath. 

 Fourth ventral plate with short, decumbent bristles on pos- 

 terior central portion, the bristles longer posteriorly ; fifth ven- 

 tral plate blackish, divided, the inner edges of lamellae with 

 bristles. 



ChcBtotaxy. — Second segment may be without two dorsal 



