332 Annals Entomological Society of America [Vol. XI, 



costa extends a little over half the distance between the tips of Rg and 

 Mi; Rs ends slightly distad of .85 the length of the wing, and notice- 

 ably proximad of the tip of M2. Halteres fuscous. 



Described from 1 male, collected near Leander, Wyoming, 

 August, iDy Roy Moodie, at an elevation of 5.000 to 8,000 feet. 

 Type No. 214. 



10. Neosciara joffrei n. sp. 



Male: Length, 2.5 mm. Head dull, black; antennae fuscous, over 

 half the length of the body; palpi fuscous. Thorax shining, dark 

 fuscous. Hypopygium with no median ventral lobe at base, fuscou's; 

 clasper (Fig. 10) conical, with 2 apical subequal stout s|3ines and 1 sub- 

 apical longer more slender spine. Legs fuscous. Wings (Fig. 41) 

 hyaline; media and cubitus without setae; base of Rs at the midpoint 

 between humerus and the tip of Ri ; Ri ends about opposite the forking 

 of media; petiole of cubitus over half the length of the base of media; 

 costa extends -over two-thirds the distance between the tips of Rs and 

 Mi; Rg ends slightly distad of .85 the length of the wing and proximad 

 of the tip of Ma- Halteres fuscous. 



This species is similar to fochi, but differs in structure and 

 shape of the clasper, the shorter petiole of cubitus, and the 

 longer costa. 



Described from one male, collected at North Mt., Pa., 

 June 7. Type No. 215. 



11. Neosciara quadrispinosa n. sp. 



Male: Length, 2.6 mm. Head shiny, black; antennae piceous, over 

 half the length of the body; palpi piceous. Thorax shiny, piceous to 

 black. Abdomen piceous, the anterior half of the intermediate seg- 

 ments brown. Hypopygium brown, with no median ventral lobe at 

 the base; clasper (Fig. 11) circular, with 4 long conspicuous stout 

 spines at the apex, no subapical spines. Coxae, femora and tibiae luteous, 

 tarsi fuscous. Wings (Fig. 42) smoky; media and cubitus without 

 setae; base of Rs 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 half the length of the base of media; costa extends at least 

 two-thirds the distance between the tips of Rs and Mi; Rs ends distad 

 of .85 the length of the wing and about opposite the tip of Mo. Halteres; 

 knobs fuscous, pedicels luteous. 



This species differs from dux and imitans, by having no 

 mesal process on the clasper and by having Rg end opposite the 

 tip of M2. 



Described from one male collected at North Adams, Mass., 

 March 20. Type No. 216. 



