bulletin: MUSEUM Ol comparative eoo'logy. 



branches of the median vein run oul to the margin unforked; of the three 

 oonneeting veinlets between radius and radial sector tin- second ii more than 



twice as near the third than to the hi'-t , S oostal CrOSS-veiE 



Length 8 mm. 



PHOTOS] ILIS HIM ICULATA, Bp, DOV. 



Type. M. C. X. 10,842. Bolivia: Ri<> Longo (II. Fassl). 



Black, with yellowish head and prothorax. In general closely similar \<> 



/'. mexicana, but the head has a distinct black spot above each antenna, and 

 behind the eye is a black trifid mark back of the upper part of eye, instead of 

 the much larger bifid mark back of entire eve in 1\ mexicana, Hie wingE are 

 infumate much as in /'. americana, not as black as /'. mexicana, the venation 

 about as in P. mexicana, the basal cross-vein between the cubitus and first 

 anal ends on cross-vein much beyond origin of radial sector, the lir-i cross* 

 vein between radius and radial sector is transverse instead of oblique as in 

 V . mexicana. 



Length to tip of wing 15 mm. 



SlALIS A.EQUALIS, Sp. DOV. 



Type.— M. C. X. 10,843. Va.: Falls Church, 19 April to 25 June 

 (X. Banks). Mich.: Agricultural College (R. H. Pettit). Maine: 

 Norway (S. I. Smith). Mass.: Milford, 8 June. N. J.: Lafayette, 

 26 May. 



Deep black, some specimens showing the wings paler beyond the basal third. 

 Structure in general similar to S. infumata and S. concaca but the ventral plate 

 of male is nearly as long as broad, with subparallel sides, and a broadly rounded 

 tip, usually covering all the other parts from below; the last dorsal segment of 

 male is broadly excavate below, not so deeply nor so narrowly as in the other 

 species. The hair of head and thorax is very short as in the other eastern 

 species; the middle veinlet connecting radius and radial sector oblique as in 

 other eastern species. 



Expanse 16-19 mm. 



SlALIS CALIFORNICA, sp. nOV. 



Type. — M. C. X. 10,844. Calif.: San Emigdio Canon, Kern Co., 

 3 June (F. Grinnell); Summit, Sierra Nevada (Osten Sacken); San 

 Geronimo, 20 April (Osten Sacken); Saucelito, 15 May (H. Edwards).' 



Deep bjack; with rather long dense hair on head and thorax, and with the 

 second connecting veinlet between radius and radial sector straight as in the 



