90 
Psyche 
[June 
be distinguished from these by the contour of the fourth longi- 
tudinal vein, which in its apical part is bluntly angular and a 
little sinuate beyond the bend, whereas in Pyrellia and Morellia 
the curve of the distal section of the fourth vein is broad and 
gentle. 
1. Cryptolucilia caesarion (Meigen) ( =Musca ccesarion 
Meigen, Syst. Beschreib. Europ. zweifl. Ins., 5, 1826, p. 57). 
Thorax with a pair of acrosticals before the transverse suture, 
usually placed rather irregularly in an oblique line; three pos- 
terior dorsocentrals. Front of the male about one-sixth the 
width of the head; in the female comparatively wide, measuring 
over one-third of the total width of the head. 
This is a common and widely distributed North American 
species and, as stated above, is labeled “ Pseudopyrellia cor- 
nicing’ in American collections. The figures given by Hough 
(Biol. Bull., 1, 1899, p. 27, fig. 9) for cornicina undoubtedly refer 
to this species. I have seen specimens from the following 
States: Maine, New Hampshire, Vermont, Massachusetts, 
Connecticut, Rhode Island, New York, New Jersey, Pennsylvania, 
Maryland, Virginia, North Carolina, Nebraska, Texas, South 
Dakota, Arizona, California, and Washington; also from 
Canada (Ontario, Quebec.) In addition, Dr. Aldrich possesses 
specimens from Kansas, Idaho, Nevada, and New Mexico. 
The brilliant blue larva lives in cow manure and the adult 
flies are commonly found on fresh cow dung. This is evidently 
the species which was reported by Howard (Proc. Washington 
Ac. Sci., 2, 1900, p. 579), Brues (Psyche, 9, 1902, p. 354), and 
F. C. Pratt (Canad. Entom., 44, 1912, p. 181) under the name 
“ Pseudopyrellia cornicina ” as having been bred in abundance 
from cow manure. Howard figures the early stages. 
Among the very large number of Cryptolucilice from North 
America examined, I have found only one in which the anterior 
acrosticals were lacking, but as this specimen possessed three 
posterior dorsocentrals, I believe it is an abnormal example of 
C. ccesarion. 
