356 THE BLOWFLIES OF NortH AMERICA 
Male. Head height 10.0; head width 11.0; length at antenna 
6.5 and at vibrissa 6.0; bueca 0.33 eye height; parafaciale op- 
posite second antennal segment 1.5 in width; distance between 
vibrissae 2.2; front at narrowest 0.07 of head width, 0.15 at 
vertex, and 0.47 at lunule; eye height 7.4; carina high and 
sharp; third antennal segment 1.5 times as long:as second. 
Thorax with two postacrostichal bristles. ; 
Legs with middle tibia with two or three anterodorsal bristles, 
one (rarely two) ventral bristles, three posterior bristles, and 
one posterodorsal bristle; hind tibia with two anteroventral 
bristles slightly beyond middle, and anterodorsal and postero- 
dorsal rows of bristles. 
Genital segments (pl. 31, E and F) as illustrated. 
Female. Like male except head height 11.4; head width 10.6; 
length at antenna 7.2 and at vibrissa 6.4; bucca 0.57 eye height; 
parafaciale opposite second antennal segment 2.6 in width; dis- 
tance between vibrissae 2.2; front at narrowest (at vertex), 0.41 
of head width and 0.62 at lunule; eye height 6.6; third antennal 
segment 1.8 times as long as second. 
Length. 7-9 mm. 
I have seen fifteen male and female specimens of satanica: 
the six specimens in the type series, collected at Los Gatos 
Canyon, Mt. Diablo Ridge, Calif. (June 6-8, 1907, Bradley) ; 
three, Sacramento, Calif. (May 24, 1930, Keifer); two, Giant 
Forest, Calif. (July 28, 1929, Oman and Anderson) ; one, Eureka, 
Calif. (July 18, 1935, Beamer); one, Humboldt Co., Calif. 
(June 19, Barber); and one, Forks, Wash. (July 238, 1933, 
Wilcox). 
The Sacramento specimens differ slightly from the type 
series. The bucea is obviously wider and the width of the front 
in both sexes is narrower. I am unable to find other characters 
to substantiate an opinion that they might represent a different 
species. The male genitalia appear exactly like those of males 
in the type series. 
MELANODEXIOPSIS, NEW GENUS 
Male and female. Species belonging to this genus differ from 
those of Melanodexia in the shape of the facial carina. In 
Melanodexia this is short, sharp, obvious in profile, and extends 
only to about the middle of the short third antennal segment. 
In Melanodexiopsis the carina is apparent only at the lunule and 
between the basal antennal segments; it is low and rounded and 
does not divide the clypeus into two distinct parts. Species of 
