1918] Revision of the Ge?ms Sciara 331 



setose; base of Rs about at the mid-point between the humeral cross 

 vein and the tip of Ri; Ri ends distad of the forking of media; petiole 

 of cubitus less than one-fourth the length of the base of media; costa 

 extends about two-thirds the distance between the tips of Rg and Mi; 

 Rs ends distad of .85 the length of the wing and slightly proximad of the 

 tip of M2. Halteres fuscous. 



This species is similar to both habilis and serrosa, but differs 

 from both by having a subglobose clasper, and by having dark 

 coxae and halteres. 



Described from 1 male, collected at Muir Woods, Cal., 

 Aug. 30, 1908, by J. C. Bradley, Type No. 212. 



NEOSCIARA. 



(New genus.) 



8. Neosciara falcata n. sp. 



Male: Length, 2.3 mm. Head black; antennas: fiaggelum black, 

 scape luteous; palpi luteous. Thorax; mesonotum and metanotum 

 fulvous, not shiny, pleura fuscous. Abdomen fuscous. Hypopygium 

 brown, with a basal median ventral lobe (Fig. 8, b) on which are about 

 14 prominent spines arranged in 2 rather indistinct rows; clasper 

 (Fig. 8, a) with an apical spine and no subapical spines. Legs: coxae 

 and femora luteous; trochanters, tibiae and tarsi fuscous. Wings 

 (Fig. 39) hyaline; media and cubitus without setse; base of Rg at the 

 mid-point between the humeral cross vein and the tip of Ri; Ri ends 

 slightly (not more than one-tenth the wing length) proximad of the base 

 of the fork of M; petiole of cubitus over half the length of the base 

 of media; costa extends over half the distance between the tips of Rg 

 and Mi; Rg ends distad of .85 the length of the wing and about opposite 

 the tip of Mo. Halteres luteous. 



This species is related to fulvicauda but is easily separated 

 from the latter by the structure of the clasper and the longer 

 petiole of cubitus. 



Described from one male, collected at Auburndale, Mass., 

 April, 1916. Type No. 213. 



9. Neosciara fochi n. sp. 



Male: Length, 2.5 mm. Head black; antennas missing; palpi 

 missing. Thorax shiny, black. Abdomen fuscous to black. Hypopygium 

 fuscous, with 2 clusters of prominent spines at the base, one on each 

 side of the mid ventral line (Fig. 9b) ; clasper (Fig. 9a) with 2 apical 

 stout spines and no subapical spines. Legs fuscous to black. Wings 

 (Fig. 40) smoky; media and cubitus without setae; base of Rg at the 

 mid-point between the humeral cross vein and the tip of Ri; Ri ends 

 slightly (not more than one-tenth of the wing length) proximad of the 

 forking of M; petiole of cubitus a little longer than the base of media; 



