306 THE BLOWFLIES oF NortH AMERICA 
for both are saprophagous and the adults may be collected over 
carrion or in carrion-baited traps. 
Aldrich indicated, by his arrangement of specimens in the 
National Collection, that he considered both terrae-novae Mac- 
quart and uralensts Villeneuve synonymous with vomitoria (Lin- 
naeus). But males of the European wralensis have the length of 
the head at the antenna 0.78 of the length of the head at the 
vibrissa, 0.89 in the female, the front at the narrowest is 0.38 of 
the head width in the female, widening to 0.44 at the lunule, 
and the outer forceps of the male genitalia are truncate at the 
tips. 
Calliphora uralensis is much more closely related to vomitoria 
than to terrae-novae. There are normally three posterior bristles 
on the middle tibia in vomitoria and in about 20 percent of the 
specimens of uralensis. Specimens of uralensis with tawny or 
reddish hair anterior to the metacephalic suture and with three 
posterior bristles on the middle tibia are difficult to separate from 
vomitoria. It is possible that both wralensis and terrae-novae are 
either recently differentiated species or are but variants of vomi- 
toria. It appears to me that the former is probably the true in- 
terpretation, terrae-novae being further removed from the typi- 
eal vomitoria parent stock than wralensis. 
Calliphora terrae-novae is sometimes found in collections de- 
termined by Hough under the name nigribucca. This name was 
nomen nudum until Shannon validated it by citation in sy- 
nonymy with his variety vomtoria ngribarba. 
Collin’s (1931, 1932) specimens of uralensis from Greenland 
_are probably this species. 
Only the holotype female of Calliphora irazuana Townsend 
remains in the National Collection. Apparently it is terrae- 
novae. A male, identified by Aldrich as trazuana, is vomitoria. 
Another male in the same series and from the same locality is 
terrae-novae. The form differs from typical terrae-novae only in 
having the base of the wing darkened. The type locality for 
irazuana is far south of the normal range for terrae-novae, and 
I hesitate to synonymize it positively without additional material. 
Calliphora germanorum Villeneuve is very close to this species, 
judging from two female specimens from Sweden in the National 
Collection which were determined by Villeneuve. These two 
specimens differ from terrae-novae in having but one ventral 
bristle on the middle tibia, a character which is not entirely 
constant in other species of Calltphora, and in having the meso- 
‘thoracic spiracle with brown hair. 
