HELEOMYZID FLIES NORTH OF MEXICO—GILL 549 
Epiphallic process of terminalia with no distinct posteroventral 
projection or elongation. 
Fremate.—Similar to male; tip of abdomen without distinct spines, 
but with long silky hairs. 
Lreneru.—5.5—-6.0 mm. 
DistriBpuTIoN.—Manitoba, Michigan, New York, Quebec; June- 
August. 
Anorostoma lutescens Curran 
FI@urRE 46 
Anorostoma lutescens Curran, 1933, p. 8. 
This species is very similar to Anorostoma jersei Garrett. In fact, 
the type male of A. lutescens Curran agrees with specimens in the 
Garrett collection which are labelled A. gersei var. occidentialis Gar- 
rett. The best means of distinguishing the two species from each 
other appears to be the structure of the male terminalia (refer to 
the key to species of Anorostoma, p. 542). The reddish vittae on 
the mesonotum of A. lutescens Curran and their absence from A. 
jerser. Garrett appear to be a useful supplementary character, and 
perhaps the only means of distinguishing the females from each other. 
Curran’s original description is based on a single male from Boiler 
Bay, Oreg., 18 May 1930, J. Wilcox. The description is adequately 
detailed, except that it gives insufficient information on the structure 
of the male terminalia. 
Disrrinution.—Oregon, Washington; May—July. 
Anorostoma jersei Garrett 
Figures 47, 55 
Anorostoma jerset Garrett, 1924, p. 29.—Curran, 1933, p. 5. 
Anorostoma jerseyae Garrett, Czerny, 1927b, p. 37. 
This species is best distinguished by the structure of the male 
terminalia. ‘The spines at the tip of the female abdomen may be 
of some use (refer to the key to the species of Anorostoma). 
The species was described from a single male taken at Manumuskin, 
N.J., 10 May 1903, by J. M. Aldrich. 
MALE AND FEMALE.—Similar to A. lutescens Curran; cheek-eye ratio 
usually from 0.55 to 0.65, but in some specimens it may reach 0.75. 
Thorax brownish in ground color and may appear so in “wet’’ speci- 
mens, but usually there is a heavy silvery pollinosity over the entire 
thorax; mesonotum with dark spots at bases of bristles, sometimes 
evidence of shaded vitiae, but not reddish vittae as in A. lutescens 
Curran; scutellum usually bare, except for 2 pairs of lateral bristles, 
but I have seen 2 specimens with several scattered lateral setae. 
