HELEOMYZID FLIES NORTH OF MEXICO—GILL 531 
The yellow to reddish orange color of the entire body and the row 
of very stout posteroventral spines on the hind femur distinguish 
this species. 
I have examined the type male (No. 25314) and another male in 
the U.S. National Museum. One other male was found in the col- 
lection of Marshall R. Wheeler. 
Matzr.—Front, vertex, and antennae reddish orange, arista brown, 
remainder of head yellow; fronto-orbital plates and ocellar triangle 
with silvery gray pollinosity; anterior fronto-orbital bristle about 
% to % the height of the posterior bristle; oral vibrissae strong, 1 or 2 
rows of buccal setae; cheek-eye ratio from 0.7 to 0.85; eye slightly 
elliptical. 
Remainder of body more or less yellowish orange; mesonotum with 
slight grayish pollinosity; dorsocentrals and prescutellars distinct, but 
weaker than the other bristles of the mesonotum; chaetotaxy of pleura 
as in generic description; middle femur with about 3 irregular rows 
of short bristles on anterior and anteroventral sides; middle tibia 
without bristles, other than the dorsal preapical and several ventral 
apical bristles; hind femur much thickened, with about 4 to 6 bristles 
in distal half on anterodorsal side; a row of 11 or 12 conspicuous stout 
spines along posteroventral side of hind femur; wings hyaline with 
brownish tinge; abdomen with fifth tergite shieldlike, so that the small 
terminalia are hidden beneath. 
Lenetu.—About 6.0 mm. 
DistrisuTion.—Wisconsin, Virginia, New York; September- 
October. 
Lutomyia aldrichi Sabrosky 
Lutomyia aldricht Sabrosky, 1949, p. 4. 
Sabrosky’s original description is adequate for this species. 
DistriBpuTIon.—Sabrosky gives the following: 
Holotype, male, allotype, and three paratypes (two males and one female), 
Rocky Flat, sixteen miles northwest of Naches, altitude about 3,800 feet, Yakima 
County, Washington, collected November 14, 1946 (Harold E. Broadbooks), 
in nest of Hutamias amoenus affinis; four paratypes (three males and one female), 
collected November 13, 1947, otherwise same data. Type, allotype, and two 
male paratypes in the University of Michigan Museum of Zoology, two paratypes 
(male and female) in the United States National Museum, three paratypes (two 
males and one female) in the George Steyskal collection. 
Lutomyia distincta Garrett 
Lutomyia distincta Garrett, 1924, p. 30.—Czerny, 1927b, p. 40.—Sabrosky, 1949, 
p. 6. 
This species was described by Garrett from a single female collected 
at Rushmer, Windermere, British Columbia, 15 Nov. 1922. There 
