46 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
shining black callosity of the frons quite convex and reaching to the 
ocellar tubercle (fig. 58); ocellar tubercle and vertex gray pollinose. 
A few short black hairs on the upper third of the frons and just 
above the antennae. 
Thorax and legs as in the male, the pile on the dorsum of the 
thorax shorter, the reclinate yellow pile more noticeable. Halteres 
blackish brown. Spot at end of cell first M-2 very faint. Abdomen 
shining blackish brown, the first segment largely gray pollinose, a 
silvery spot on the posterior angles of second and fifth segments; 
posterior margin of second and third segments white, above the white 
on the second segment a narrow border of silvery pollen. 
Type locality Chiricahua Mountains, Arizona, May 30 (H.G. 
Hubbard). 
Type.—Male, Cat. No. 25932, U.S.N.M. 
The types are rather imperfect specimens. There are two female 
paratypes in the collection of the California Academy of Sciences, 
taken June 20, 1916, in Mormon Canyon, Arizona. In both of these, 
as in the types, the third antennal joint is missing. The unusual 
yellow color of the first two antennai joints will easily distinguish 
the species. 
PSILOCEPHALA JOHNSONI Coauillett. 
1893. Psilocephala johnsoni Coquituert, Can. Ent., vol. 25, p. 228. 
The type isa unique female, in C. W. Johnson’s collection. A 
female loaned for study by Mr. Johnson seems to be scarcely distin- 
guishable from P. notata Wied. It is reported from St. Augustine 
and Ormond, Florida, in Aldrich’s catalogue. 
Type locality.—“ Florida.” 
PSILOCEPHALA UNIVITTATA Bellardi. 
1861. Psilocephala univittata BeLLarpt, Saggio di Ditter. Messic., vol. 2, p. 90. 
I have translated the original description, which is fairly complete, 
and from which the following notes are given: 
Female.—Front bare, black, shining, on sides at base whitish gray pollinose; 
antennae black; occiput gray, gray pollinose; thorax black, longitudinally obsolete 
gray quadrivittate; halteres black. 
Abdomen long, almost bare, black, shining; fifth segment obsolete gray pollinose. 
Femora black; tibiae and tarsi brown. Wings yellowish hyaline; veins faintly 
margined brown. Length 9 mm. 
These are the most important parts of the description. 
Type locality.—Puebla, Mexico. 
Type.—Said to be in the collections of Saussure, Bigot, and 
Bellardi. The Bigot collection is now owned by J. F. Collin, New- 
market, England, and Bellardi’s is in Turin, Italy. 
Distribution.—Williston records this species in the Biologia Centrali 
America (vol. 1, p. 297) from specimens taken at Xucumanatlan, 
