170 THE CANAD1A.N ENTOMOLOGlSl', 



Phyto nigricornis, n. sp. $ . 



Eyes very dark brown ; frontal vitta soft black, sides of front shining 

 black, more or less silvery, the front about one-third width of head in 

 middle ; tace and cheeks black, thinly silvery pollinose, the cheeks 

 black hairy and with brownish pregenal area ; frontal bristles rather 

 thick and strong, no orbital brisdes ; vibrissae inserted considerably 

 above oral margin, strong, decussate ; antennae and arista black, 

 second antennal joint brownish, third joint no longer than second ; 

 proboscis black, labella brownish, palpi light rufous ; occiput black, 

 more or less silvery or cinereous, black - hairy. Thorax shining 

 black, very faintly, almost imperceptibly, grayish pollinose ; scutellum 

 black. Abdomen shining black, first segment faintly, others more 

 distinctly, yet thinly, silvery or grayish pollinose ; first segment with 

 two or three lateral macrochaetse and four median marginal ones, 

 segments two to four with a marginal row ; hypopygium more or less 

 exserted. Legs black, rather stout, claws and pulvilli elongate ; claws 

 blackish, pulvilli smoky-whitish, black at base. Wings grayish-hyaline> 

 slightly tawny at base, veins brownish ; teguljB whitish, shining, borders 

 narrowly tawny ; halteres rufous, knobs blackish. 



$ . — Front about one-third width of head but nearly equilateral, while 

 in the (^ it is much wider before than at vertex ; two orbital bristles. 

 Abdomen terminated by a forceps, the whole abdomen shining black, 

 not pollinose ; the macrochaetas weaker, and second segment with same 

 number as first. Claws and pulvilli much shorter, yet somewhat elongate. 



Length of body, (J , 5 to 6 mm.; $, 4^ mm.; of wing, ^, 4 to 5 

 mm.; ? , 3^ mm. 



Described from seven males and one female ; Las Cruces, New 

 Mexico. One male taken Sept. 20, all the others Oct. 25. 



MuscoPTERYx, n. gen. 



Belongs in Phytomce. Head more or less rounded in profile. Front 

 of $ averaging about one-third width of head, gradually widening from 

 vertex forward, face widened at same angle ; frontal bristles in single row, 

 descending on sides of face not quite to lower border of eyes, those on 

 front stronger, vertical bristles strongest and, with next pair, directed 



