66 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
This species would run to couplet 5 in Kréber’s table of species and 
to baccata in the table of females. It is related to baccata and pavida. 
There are two paratypes, a male and female, in the collection with 
the types. 
PSILOCEPHALA PAVIDA Coguillett. 
Plate 6, fig. 51; plate 7, fig. 77; and plate 8, figs. 84 and 98. 
1893. Psilocephala pavida CoQuiLLEtT, Can. Ent., vol. 25, p. 226. 
Type locality —Los Angeles County, California. 
Type.—Male, No. 10412, U.S.N.M. 
The following notes are made from specimens taken in southern 
California: 
Male.—Length 6 mm. On upper corner of frontal triangle there 
are two small but quite noticeable tufts of black pile. First and 
third antennal joints about equal in length, the first joint swollen 
and with unusually long black bristles. (fig. 84.) Pile of cheeks, 
palpi, and occiput largely black. 
Thorax and scutellum dark, almost blackish gray pollinose, with 
two light-gray, widely separated, vittae; the lateral margins of 
thorax and margin of scutellum light gray; scutellum with four 
marginal bristles. Mesonotum with reclinate yellowish tomentumlike 
pile and erect black pile; pile of scutellum yellowish. Pile of pleura 
and coxae largely whitish. Stem of halteres brown, base of knob 
blackish, the larger part of the knob whitish. The reclinate pile of 
the femora white, the erect pile black, especially noticeable on the 
two front pair. Genitalia black, characteristic in form (fig. 98), 
largely yellowish white pilose. 
Female.—Length 6 to 7mm. From the description much like the 
female of baccata. Pollen of upper two-thirds of frons yellowish gray, 
with numerous short black hairs; the lower part of the frons silvery 
white, two small velvet black spots at the junction of the two colors 
asin baccata. (Fig. 51.) Pile of occiput, cheeks, and palpi white. 
Bristles of antennae shorter than in the male. 
Reclinate yellow pile of the thorax denser, the erect black pile 
shorter than in the male. Pile of pleura white. Pile of femora 
shorter than in the male; four hind tibiae and bases of four hind 
tarsi reddish brown. 
Distribution.—The five males and eight females examined were 
from the following localities: California—Redlands, August and 
September (Cole); East Highlands, October (Cole), [Cole]; Santa 
Clara County (Harkins), [Stanford U.]; Laguna Beach, August 
(Baker), [Pomona College]. 
