Diptera 81 c 
Scatophaga Fallen. 
The members of this genus are much more common in temperate latitudes 
than in subtropical or tropical, and are, judging from collections I have examined, 
particularly abundant both in individuals and species in the extreme northern 
portions of the western hemisphere. In the present collection there are three 
species represented bj^ thirty-seven specimens. 
The larva3 feed upon decaying vegetable matter and in manure; the flies 
are predaceous, but also feed on the same substances as the larvae. 
In order to make it possible for students of the order to recognize the species 
before me, I give a key for their identification, using characters similar to those 
used in a key to part of the same genus in a paper written for the U. S. Bureau 
of Biological Survey on Pribilof Island Diptera, which at time time of writing 
is ready to go to press. 
Key to Species. 
1. IJia and hind tibiae with a number of strong outstanding bristles in addition to the 
long, soft hairs 2 
Mid and hind tibiie without strong bristles, with only soft hairs (Group unrepresented) 
2. Cross-veins of wings not infuscated; legs almost entirely black (Unrepresented) 
Cross-veins of wings very noticeably infuscated; legs almost entirely, or entirely, yellow- 
ish or reddish 3 
3. Arista long haired at base; antennse entirely reddish yellow; apical ventral abdominal 
segment of male as in PI. X, fig. 35; pteropleura bare tsuilla Fabricius. 
Arista bare 4 
4. Hind femur with several long bristles on antero-dorsal surface of apical half; ptero- 
l)lem'a and hypopleura bare f areata Say . 
Hind femur without such bristles; pteropleura sometimes with a few long hairs on 
centre; upper portion of hypopleura with a few long hairs rubicunda Malloch. 
Scatophaga suilla (Fabricius). 
Musca suilla Fabricius. Ent. Syst., vol. 4, p. 343, 1794. 
One male and one female, Nome, Alaska, August 21, 1916 (F. Johansen). 
A European species previously reported from Alaska. 
I have figured the fifth sternite of suilla and lutaria Fallen to illustrate 
the specific distinction (PI. X, fig. 5, 35 and 35a). Lutaria occurs in Alaska, 
Ohio, and New Hampshire. 
Scatophaga furcata (Say). 
Pyropa furcata Say. Jour. Acad. Nat. Sci. Fhila., vol. 3, p. 98, 1823. 
Thirty-two specimens from the following localities: Nome, Alaska, August 
21-25, 1916, eight specimens (F. Johansen); Barter island, Alaska, July 2, 
1914, twelve specimens, June 8, 1914, twelve specimens (D. Jenness); Collinson 
point, Alaska, June 15, 1914, twelve specimens (F. Johansen); point Pullen, 
Wollaston peninsida, Victoria island, August 18, 1915, one specimen (D. Jenness). 
This very common species occurs throughout North America well into 
the arctics, and is equally common in Europe. 
Scatophaga rubicunda Malloch. 
Scatophaga rubicunda IMalloch, in i)ress. 
This species is represented in the collection by three specimens, one male 
from Cockburn point, Dolphin and Union strait, Northwest Territories, Canadian 
Ar-ctic coast, September 7, 1914, and one male and one female from Bernard 
harbour. Dolphin and Union strait. Northwest Territories, Jtme 17, 1915, and 
June 20, 1916 (F. Johansen). ■ •; •- 
i have previously seen it from Pribilof islands, Bering sea. ■ 
Vol. iii— 4696b— 6 
