JUN 24 1922 
PSYCHE 
VOL. XXIX. JUNE 1922 No. 3 
THE NORTH AMERICAN SPECIES OF CRYPTOLUCILIA 
BRAUER AND BERGENSTAMM (PSE UDOP YRELLI A 
GIRSCHNER) (DIPT ERA, ANT HOMY I DM). 
By J. Bequaert. 
Some time ago I sent to the eminent French dipterist, Dr. 
J. \ illeneuve, a series of specimens of the common blue-green 
anthomyid fly which is passing in this country under the name 
“ Pseudopyrellia cornicina.” Dr. Villeneuve called my attention 
to the fact that these specimens were not true cornicina but 
belonged to a related species, ccesarion (Meigen). On taking the 
matter up with Dr. J. M. Aldrich and Mr. C. W. Johnson, and on 
examining a number of public and private collections, it becomes 
apparent that these two species are generally confused here. 
Aldrich (Cat. North American Dipt., 1905, p. 524), for instance, 
treats cornicina and ccesarion as synonyms. It seems useful 
therefore to point out the main differences between them, so as 
to facilitate their identification by local entomologists. 
As indicated by Stein (Arch. f. Naturg., 83, Abt. A, Heft 1, 
1919, p. 105), the name Cryptolucilia Brauer and Bergenstamm 
(Denkschr. Ak. Wiss. Wien, 60, 1893, pp. 179 and 206; type: 
C. asicitica Brauer and Bergenstamm = Musca ccesarion Meigen 
according to Stein) has priority over Pseudopyrellia Girschner 
(Berlin. Entom. Zeitschr., 38, (1893) 1894, p. 306), since Girsch- 
ner’s paper was not issued until January 1894. 
The species of Cryptolucilia have long been placed among 
Lucilia, which they resemble in color and general appearance. 
They are, however, easily separated from the latter genus by the 
absence of hypopleural bristles and the arrangement 1 : 2 of the 
sternopleural bristles. Cryptolucilia therefore belongs to the 
Anthomydise as defined by Girschner. 
Of the Nearctic anthomyid genera, Pyrellia and M or cilia 
alone have a similar metallic blue-green color. Cryptolucilia can 
