144 
2. Abdomen distinctly yellowish on the sides or at the apex 3. 
Abdomen and thorax wholly blackish, sides of the former some- 
times tinged with reddish; base of wings yellow; length, 12 to 
17 mm. Toronto, Canada; White Mountains and Franconia, 
X. H.; Vermont; New Bedford, Mass.; Oswego, X. Y.; Colo- 
rado: Montana; British Columbia; Washington; Oregon, and 
California. (Ausser. Zweif. Insekten, Vol. II, p. 285; 1830: 
Tachina. Echinomyia picea Desvoidy, Essai sur les Myodaires, 
p. 44; 1830. Echinomyia lapihui Desvoidy, loc. eit. Tachina 
degenera Walker, List of Dipterous Insects, Part IV, p. 732; 
1849. Jurinia nitida van der Wulp, Notes from the Leyden 
Museum, Vol. IV, p. 82; 1882. Echinomyia Jugubris van der 
Wulp, Tijdschrift voor Entomologie, Vol. XXVI, p. 20; 1883.) 
a I yens Wied. 
3. Second segment of abdomen bearing at most four marginal macro- 
chsetae 4. 
Second segment of abdomen bearing at least ten marginal inacro- 
chaetae on the dorsum, abdomen wholly yellow, middle of dorsum 
of second and third segments covered with black macroclneta?; 
length, 14 mm. Colorado and Washington. (Trans. Amer. Ent. 
Soc., Vol. XIII, p. 297; October, 1880 : Dcjcania.) . .hystricosaWill. 
4. First segment of abdomen on the sides largely or wholly yellow, the 
fourth yellow at least on the front corners 5. 
First segment wholly black, or at most with the hind angles nar- 
rowly yellow; front tarsi of female broadly dilated; abdomen 
black, the apex broadly, or the sides of the last three segments 
and apex of the last, or only the sides of the second and third 
segments, yellow; length, 10 to 13 mm. Canada; White Moun- 
tains and Franconia, X. H.; Xew Bedford, Mass.; Buena Vista, 
X. J., and Xorth Carolina. (List of Dipterous Insects, Part IV, 
p. 722; 1849: Tachina.) florum Walk. 
5. Palpi only halt as long as the proboscis beyond the basal articula- 
tion, front of male one and one half times as wide as either eye, 
head at base of antenna 1 , much longer thau at the vibrissa', front 
projecting in front of the eyes one and one-half times the hori- 
zontal diameter of the latter; abdomen of male yellow, middle of 
first segment, a dorsal spot, and genitalia black; length, 12 mm. 
Los Angeles County, Cal. (Bulletin Soc. Ent. France, p. cxli; 
1887 : Fabricia.) ' infumata Bigot. 
Palpi almost as long as the proboscis, front of male two-thirds as 
wide as either eye, head at base of antenna? not longer than at 
the vibrissa?, front projecting in front of the eyes less than the 
horizontal diameter of the latter; abdomen yellow, usually 
marked with a black dorsal vitta or row of spots; length, 10 to 
14 mm. Franconia, X. H. ; Xorth Carolina; Colo., and Cali- 
fornia. (Trans. Amer. Ent, Soc, Vol. XIX, p. 94; April, 1892. 
Tachina sp., Brauer and Bergenstamm in litt.) .dakotensis Town. 
