230 Journal New York Entomological Society. [VoI. xxiii, 



of heavy erect ones, with marginal row of short erect ones immedi- 

 ately behind them. Fourth segment with two transverse discal rows, 

 besides marginal bristles, the whole covering over posterior half of 

 segment. Middle and hind tibiae with much heavier spines. Cubitus 

 far removed from hind margin of wing, sometimes with very short 

 stump and always with wrinkle pronounced. 



Palpotachina similis new species. 



Length of body (flexed), ii mm.; of wing, 9 mm. One male, head of 

 Rio Piedras Verdes canyon, Sierra Madre of Chihuahua, Mexico, about 7300 

 ft., August 14, 1899 (Townsend). 



Head silvery-white pollinose, frontalia testaceous, first two antennal joints 

 and base of third rufous ; parafrontals brassy, a faint tinge of same spreading 

 over parafacials and cheeks. Occiput brassy-gray pollinose, with pale yellow 

 beard. Palpi fulvous. Thorax and legs black ; humeri, broad lateral and hind 

 borders of mesoscutum and all of scutellum yellowish-testaceous ; the dark parts 

 with silvery bloom, the lighter parts with brassy-gray bloom ; tibiae rufous. 

 Abdomen clear rufous-yellow ; the postscutellar triangle black ; an ill-defined 

 reverse triangle on anal segment black but fading out behind, the hind border 

 of segment broadly rufous. Venter all yellow except broad hind border of 

 anal segment. Hypopygium brown to blackish on exposed surface, the unex- 

 posed rufous. Wings evenly lightly smoky. Wing bases and tegulae pale 

 rust-yellow, the hind scale more or less white on disk. 



Holotype, No. 19572 U. S. N. M. 



Family EXORISTID^. 



CHRYSOMASICERA new genus. 



Genotype, Chrysoniasicera borealis Townsend new species. 



Differs from Chrysoexorista as follows : Form much broader. 

 Discals of abdomen often doubled in female, a second pair near front 

 margin of third segment. Apical scutellar bristles quite long, decus- 

 sate. Male claws very elongate. Venter and posterior part of abdo- 

 men hairy in male. Male vertex not over one fourth head width, 

 that of female a little under one third same. Cheeks less than one 

 third eye height in female, over one third same in male. Cubitus 

 angular rather than rounded. The eyes are thickly pilose in both 

 sexes. 



Chrysomasicera borealis new species. 



Length of body, 9 to 10.25 mm.; of wing, 8 to 9 mm. One male, top of 

 Las Vegas Range, above Beulah, New Mexico, in the Hudsonian zone, June 28 



