SUBFAMILY CALLIPHORINAE ~ 339 
2 to 6 in the proportion 100:75:165:50:11. Abdomen with 
fourth segment with strong erect scattered discal bristles. Legs 
with middle tibia having two ventral bristles. Otherwise similar 
to male except for normal sexual differences. 
Length. 8-14 mm. 
Distribution. WHolaretic. Northern Europe and Asia. North 
America along the Arctic Cirele, increasingly less abundant 
southward. The species is common only in the far north; most 
of the specimens I have seen are from Alaska and Greenland, 
collected during the latter part of July and in August. 
Biology, habits, and immature stages. The details of the 
biology of this species have not been worked out so far as I am 
aware. It is most often collected on decaying fish along shores 
and is undoubtedly saprophagous. 
Cynomya hirta Hough 
Cynomyia hirta Hough, Ent. News 9:166, 1898; Cole, Calif. 
Acad. Sci. Proe., ser. 4, 11(14) :172, 1921; Walton, No. 
Amer. Fauna 46(2) :228, 1923; Shannon, Insecutor Inscitiae 
Menstruus 11:115, 1923. (Type, male from St. Paul’s Is- 
land, Alaska, in the Field Museum, Chicago.) 
A large species with the general aspect of mortuoruwm but the 
abdomen more yellowish green and the body hair longer and 
thinner. | 
Male and female. Similar to mortuorum in general aspect, the 
legs with long fine hair and the faciofrontal profile protuberant, 
but bucca only 0.30 eye height, parafaciale slightly wider in rela- 
tion to distance between vibrissae, front at vertex and lunule 
0.33 head width, third antennal segment only three times as 
long as second, and the body hair long, thin, erect, and abundant. 
Length. 15-18 mm. 
Distribution. Nearctic: Alaska, George Island and St. Paul 
Island. 
The type series now contains two specimens, one male and 
one female. Another specimen, a male from St. George Island, 
is marked ‘‘ Holotype,’’ although it was not collected until July 
4, 1914 (Hough died in 1903). The male collected on St. Paul 
Island, Alaska, must be the holotype. 
