81 
the vittae indistinct; wings hyaline, calypteres white; length, 
3 mm. Las duces, N\ Mex. Two male specimens collected 
September 17, by Mr. T. D. A. Oockerell. Type ^o. 3580, U. S. 
National Museum nana n. sp. 
3. Second segment of abdomen bearing a distinct marginal pair of 
macrochaetae, abdomen gray pollinose, usually marked with two 
or three rows of blackish spots; length, 3 to 6 mm. Toronto, 
Canada; White Mountains, New Hampshire; Springfield, Mass.; 
New York City, X. Y.; Maryland; Virginia; North Carolina; 
Tifton, Ca.; Texas; Colorado; Washington, and southern Cali- 
fornia. ( Biol. Cent.-Amer., Diptera, Vol. II, p. N9 ; March, 1890 : 
Miltogramma. Arrenopus americana Brauer and Bergenstamm, 
Zweif. Kais. Mus. Wieu, V, p. 301; 1891. Miltogramma argen- 
tifrons Town send, Trans. Amer. Ent. Soc, A^ol. XVIII, p. 357; 
November, 1891. Miltogramma cinerascens Townsend, loc. cit., 
p. 358. A rrenopus sp., and Sphixapata sp., Brauer and Bergen- 
stamm in lift.) trilineata v. d. W. 
Second segment destitute of a marginal pair of macrochsetae, abdo- 
men shining, bases of last three segments white pollinose; black, 
the frontal vitta, first two joints of antennae and the palpi, yel- 
low; sides of front and face white pollinose, thorax whitish 
pollinose, the vitta not distinct, wings hyaline, calypteres white; 
length, 3 nun. Las duces, N. Mex. A single male specimen 
collected September 17 by Mr. T. I). A. Cockerell. Type No. 
3581, r. S. National Museum "... fasciata n. sp. 
Genus PSEUDOTRACTOCERA Town. 
Pseudotractocera Townsend, Trans. Amer. Ent. Soc, Vol. XIX, p. 107; May, 1892. 
Our species has three postsntural and three sternopleural macro- 
chaetae, is black, the first two joints of the antenna' and the palpi yellow; 
apex of antenna' distant from the oral margin the length of the third 
antenna! joint; length, 7.5 mm. From a co-type specimen. Las Cruces, 
N. Mex. (Loc. cit., p. 108.) neomexicana Town. 
Genus BI0MYIA Rond. 
Fabricia Meigen, System. Besch. Eur. Zweif. Insekten, Vol. VII, p. 250; 1838. 
(Non Blainville; 1828. Non Desvoidy; 1830.) 
Biomya Rondaui, Dipterologiae Italicae Prodromus, \ r ol. I, p. 72; 1850. 
Viviania Rondaui, loc. cit., Vol. IV, p. 53; 1861. 
Masvphya Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, V, p. 313; 1891. 
Viviania was proposed for the genus Fabricia of Meigen, the name 
Fabricia having been previously used by at least two different authors. 
On the same page Rond an i acknowledges that his genus Biomyia is 
synonymous with Viviania. Specimens identified by Brauer and Ber- 
genstamm as Masiphya brasiliana, the type species of this genus, do 
not possess any character of sufficient importance to warrant its sep- 
< 3359 
