SuBFAMILY POLLENIINAE ~—855 
of eye height; parafaciale 2.2 in width opposite lunule; distance 
between vibrissae 1.6; front at vertex 0.30 head width, 0.50 
at lunule; vibrissae 2.4 above oral margin; antennal segments 
orange to brown, second and third segments in proportion 
1.5:2.4, the third reaching nearly two-thirds the distance to 
the vibrissae; palpus black, 3.5 in length; frontal bristles in 
two rows, the outer row composed of weaker bristles; one pro- 
elinate and one reclinate frontoorbital bristle. 
Thorax shining black, with little or no silvery or gray pollen; 
preacrostichal bristle one; postacrostichal bristle one; scutellum 
with one discal bristle. 
Legs with middle tibia with one ventral bristle at apical 
third, one posterior bristle at apical third, and one to three 
posterodorsal bristles, one always near middle and usually one 
at apical third; hind tibia with one or two anteroventral bristles, 
one always at apical third and one sometimes near middle. 
Wing heavily infuscated basally; apical cell closed in wing- 
margin, rarely short petiolate. 
Male. With head proportions similar to those of satanica 
Shannon, otherwise as in female except for normal sexual differ- 
ences; genital segments (pl. 31, D) as illustrated. 
Length. 7-8 mm. 
The National Museum has two female specimens which I con- 
sider to be this species. Both are in poor condition; one specimen 
(Humboldt Co., Calif., June 9, Barber) determined as this spe- 
cies by Aldrich has the abdomen broken off and poorly replaced. 
The other specimen (Monterey Co., Calif., no other data) is 
abraded. I have seen the Williston type of tristis; there is little 
doubt that it is the male of glabricula. There is also a female 
Specimen of this species in the general collection of Kansas Uni- 
versity labelled ‘‘Kern County.’’ This specimen is probably a 
paratype of Williston’s tristis, for several of his type specimens 
were from that locality. 
Bigot described the species in the genus Nitellia, and Brauer 
(1899, p. 27) later placed it in Pollenia. Aldrich saw the Bigot 
type at Newmarket; I accept his determination of the species. 
Melanodexia satanica Shannon 
Melanodexia satanica Shannon, Ent. Soe. Wash. Proc. 28(6) :138, 
1926. (Type, male from Fresno County, Calif., no. 28893, 
U. S. National Museum. ) 
With the general aspect of glabricula, but with two postacros- 
tichal bristles. 
