137 
Genus CHiETOG^DIA Br. and Berg. 
Chcetogcedia Brauer and Bergenstainm, Zweif. Kais. Mas. Wien, V, p. 336; 1891. 
Our species have four postsutural and four sternopleural macro- 
cbaetae ; palpi yellow : 
1. Femora black, apical cell open 2. 
Femora and tibiae yellow, apical cell. abort petiolate, bind tibiae out- 
wardly ciliate, sides of front densely yellowisb gray pollinose, 
sides of face eacb bearing a row of rnaerochaetae and witb a row 
of bristly bairs between it and tbe eye; length, 8 mm. Santa 
Fe, N. Mex. (Biol. Cent.-Amer., Diptera, Vol. II, p. 121 j May, 
1800 : Prospherysa.) rufifrons v. d. W. 
2. Sides of front opaque, covered with a grayish pollen 3. 
Sides of front shining, destitute of pollen, sides of face bearing two 
or more irregular rows of bristly hairs between each eye and the 
row of macrocbaetae, abdomen black, the fourth segment yellow; 
length, 10 to 12 mm. District of Columbia, and Mescalero, N. 
Mex. (Tijdscbr. voor Ent,, Vol. II, p. 148; 18G7: Baumhau- 
eria. Frontina acroglossoides Townsend, Trans. Amer. Ent. Soc, 
Vol. XVIII, p. 307; December, 1891.) analis v. d. W. 
3. Macrocbaetae on sides of face much nearer to the eyes than to the 
facial ridges and appearing like a continuation of the frontal 
bristles, only a few bristly hairs between them and the eyes; 
abdomen wholly black; length, 10 to 12 mm. Las Cruces, N". 
Mex., and California. (Biol. Cent.-Amer., Diptera, vol. II, p. 
120; May, 1890 : Prospherysa.) crebra v. d. W. 
Macrocbaetae on sides of face nearer to the facial ridges than to the 
eyes and widely removed from the lowest frontal bristles, numer- 
ous bristly hairs between them and the eyes, sides of abdomen 
and the fourth segment largely or wholly yellowish; length, 10 
to 12 mm. California, and Kailua, Hawaii. (Ann. Soc. Ent. 
France, p. 91 ; 1888 : Blepliarlpeza.) monticola Bigot. 
Genus DICH0CERA Will. 
Dichocera Williston, Entomological News, Vol. VI, p. 31; January, 1895. 
Our two species are black, the palpi, apex of scutellum and of the 
abdomen, and in one species also the antennae, yellow; two sternopleu- 
ral macrocbaetae : 
Third antennal joint yellow, three postsutural macrocbaetae, a mar- 
ginal pair on the second abdominal segment and a discal pair 
on the third; length, 10 mm. Eastern Washington. (Entomo- 
logical News, Vol. VI, p. 32; January, 1895.) lyrata Will. 
Third antennal joint largely black, four postsutural rnaerochaetae, 
second abdominal segment destitute of a marginal pair, the third 
destitute of a discal pair; black, the first two joints of antennae 
