yu Psyche tjune 



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 PyreUia and Morellia 

 the curve of the distal section of the fourth vein is broad and 

 gentle. 



1. Cryptolucilia caesarion (Meigcn) (=^=Mw..sm ccesarion 

 Meigen, Syst. Beschreib. Europ. zweifl. Ins., 5, 182G, 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- 

 nicina" 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 corriicina^' as having been bred in abundance 

 from cow manure. Howard figures the early stages. 



Among the very large number of Cryptolucilia' 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. 



