330 Annals Entomological Society oj America [Vol. IX, 



Drosophila sulcata, n. sp. 



cf. Arista with five branches above and two below. Antennae 

 reddish brown, third joint dark. Front over one-third width of head, 

 reddish brown, with a dark brown ocellar dot. Second orbital about 

 one-fourth other two. Second oral bristle not quite one-half first. 

 Three large bristles on each palpus. Carina prominent, not very broad, 

 distinctly sulcate. Face reddish brown. Cheeks reddish brown; 

 their greatest width about one-fifth greatest diameter of eyes. Eyes 

 with rather short sparse pile. 



Acrostichal hairs in six rows; no prescutellar bristles. Dorsum 

 of thorax grayish pollinose, with somewhat indefinite and variable 

 reddish brown interrupted stripes. Scutellum grayish pollinose. 

 Pleurse grayish pollinose, reddish brown below. Legs, including coxae, 

 pale reddish brown. Apical and preapical bristles on first and second 

 tibiae, preapicals on third. 



Abdomen grayish, with a dark brown fascia on each side of each 

 segment, leaving usually only a median dorsal and a posterior gray line. 



Wings slightly yellowish, veins brown. Costal index about 4.6; 

 4th vein index about 1.3; 5x index about 0.9; 4c index about 0.7. 



Length of body 3mm., wings 3>^mm. 



Type and S paratypes collected at Cabin John Bridge, Md., 

 April 1914, (3 at sap), by R. C. Shannon (U. S. N. M.). Other 

 specimens have been examined as follows: Dead Run, Fairfax 

 County, and Glencarlyn, Va. ; Linnieville, Md. ; D. C. ; Ottawa, 

 Can.; Pottstown, North Mt., Pa.; Chester, Mass.; Franconia, 

 Hanover, and Bretton Woods, N. H.; Ga. 



The females agree with the above description, but the 

 thoracic color is variable in both sexes and is easily obscured 

 in imperfect specimens. 



The clearly sulcate carina, large size, six acrostichal rows, 

 and grayish thorax will serve to distinguish this species from 

 any others know^n to me. 



Drosophila virilis, n. sp. 



cf . Arista with five branches above and two below. Antenna 

 brown, third joint dark opaque reddish brown. Front over one-third 

 width of head, wider above; dull coffee brown, ocellar dot black. Second 

 orbital one- third size of other two. Second oral bristle three quarters 

 length of first. Only one long bristle on each palpus. Carina broad, 

 slightly sulcate, nose-like. Face somewhat shiny brown. Width of 

 cheek over one-fourth greatest diameter of eye. Cheeks yellowish 

 brown. 



Six acrostichal rows; no prescutellars. Dorsum of thorax and 

 scutellum dark dull brown. Pleurae and abdomen dull brown, some- 

 what darker. Legs brown, paler than thorax; no combs on first tarsal 

 joints; preapicals on all tibise, apicals on the first two pairs. 



