550 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 118 
Legs yellowish with silvery pollinosity. Abdomen yellowish brown to 
blackish in ground color, usually with a silvery pollinosity. 
Lenetu.—4.5—6.0 mm. 
DisrripuTion.—Alaska, Washington, Oregon?, California, Utah, 
Arizona, Colorado, New Mexico, Nebraska, Michigan?, New Jersey; 
May-—August. (The questionable localities are based on determina- 
tions of female specimens.) 
Anorostoma hinei Garrett 
Anorostoma hinet Garrett, 1925b, p. 4.—Czerny, 1930, p. 446.—Curran, 1933, p. 8. 
I examined the holotype female and three female paratypes in the 
Garrett collection. They were collected at Katmai, Alaska, July 
1917, by J. S. Hine. 
I cannot distinguish this species from Anorostoma jersei Garrett. 
Because the females of several related species in this complex are poorly 
known and perhaps not distinguishable from one another, it is difficult 
to establish the correct status of A. hinei Garrett. Further effort to 
collect male specimens from the type locality seems desirable. 
Anorostoma coloradense Garrett 
Ficures 45, 54 
Anorostoma coloradensis Garrett, 1924, p. 28. 
Anorostoma coloradiniense Garrett, Czerny, 1927b, p. 37. 
Anorostoma marginata Loew, Curran, 1933, p. 6. 
Curran (1933) stated that this species was synonymous with 
A. marginatum Loew, but as mentioned previously, the types of the 
two species are quite distinct. This species is very common in collec- 
tions, but is easily confused with others unless the male terminalia 
are carefully examined. 
The tip of the female abdomen has spines which are weaker than 
those of A. jersei Garrett and which may help to distinguish it. 
MALE AND FEMALE.—Upper back of head and vertex with grayish 
pollinosity, front yellowish orange, aristae dark brown, remainder 
of head pale yellow; area between antenna and eye may be somewhat 
darkened, but this darkness is not a constant character; oral vibrissae 
moderately strong with a single row of buccal setae; eye horizontally 
oval; cheek-eye ratio from 0.55 to 0.7. 
Mesonotum brown to blackish in ground color, with a grayish to 
golden pollinosity; scutellum yellowish; setae between the dorso- 
centrals variable, usually 3 to 5 irregular rows; bristles of mesonotum 
may arise from dark spots, but the setae usually do not; pleura yellow 
to yellowish brown with a grayish-yellow pollinosity; the upper part 
of the mesopleuron may be concolorous with the remainder of the 
pleura or it may be slightly or distinctly darkened. 
