125 
2. Palpi, scutelluin, and apex of abdomen, black; third aiiteimal joint 
in the female three times as long as the second, hind tibiae out- 
wardly near the middle bearing a bristle which is nearly twice 
as long as the adjacent ones; length, 7 mm. Los Angeles 
County, Cal. (Ann. Soc Entomol. France, p. 258; 1888: Chce- 
tolyga.) - nigrifacies Bigot. 
Palpi, scutelluin, and apex of abdomen, yellowish; third antennal 
joint in the female about twice as long as the second, no longer 
bristles on outer side of the hind tibire near the middle; females 
usually with a marginal pair of macrochaetse on the second 
abdominal segment, which is generally wanting in the males; 
length, 6 to 12 mm. London, Canada; White Mountains and 
Franconia, X. H.; Agawam, Mass.; Delaware County, Pa.; 
Ithaca, N.Y.; Chester, Pa. ; District of Columbia; Portsmouth, 
Va. ; Shreveport, La. ; Illinois; Agricultural College, Mich.; St. 
Louis, Mo.; Washington, and Germany. Four males from Ger- 
many received from Zeller and by him labeled Nemorcea 4-pustu- 
lat<(. (Entom. Systematica, Vol. IV, p. 324; 1794: Musca. The 
following synonymy is by Schiner in Faun. Austriaca, Vol. I, p. 
454: Winthemia cinerea Desvoidy, Ann. Soc. Entomol. France, 
p. 270; 1847. The following is by the writer: Exorista leu- 
canice Kirkpatrick, Ohio Agricultural Report for 1860, p. 757; 
1861. The following is given in Osten Sacken's Catalogue: 
Exorista ostensacl'enii Kirkpatrick, loc. cit. Senometopia m Hi- 
tar is Walsh, Trans. 111. State Agric. Soc, Vol. IV, p. 367; Sep- 
tember, 1861. The following is by the writer : Exorista cecropice 
Riley MS., from the proposed type specimen. Tachina deile- 
philce Osten Sacken, Canadian Entomologist, Vol. XIX,]). 164; 
September, 1887. Exorista infesta Williston, in Fourteenth 
Report State Ent. Illinois, p. 6o; 1885. Chcetolyga rufonotata 
Bigot, Ann. Soc. Entomol. France, p. 257; 1888. Chcetolyga 
rufopicta Bigot, loc. cit., p. 259. Exorista ciliata Townsend, 
Trans. Anier. Ent. Soc, Vol. XVIII, p. 363 ; Dec, 1891. Exorista 
platysamice Townsend, loc. cit., Vol. XIX, p. 288; Dec, 1892. 
Exorista datanee Townsend, loc. cit. Chcetolyga deilephilce O. S., 
Brauer and Bergenstamm in litt.) qiiadripustulata Fabr. 
Genus MUSCOPTERYX Town. 
Muscopteryx Townsend, Canadian Entomologist, Vol. XXIV, p. 170; July, 1892. 
Our species is black, including the palpi; three postsutural and three 
sternopleural macrocha3ta3 ; length, 9 mm. Missouri. (Loc. cit, p. 171.) 
vhcetosula Town. 
