HELEOMYZID FLIES NORTH OF MEXICO—GILL io 
sylvania, New Hampshire, Massachusetts, Maine, Quebec, New Bruns- 
wick, Nova Scotia; March—August. 
Remarks.—I have 1 male from Alaska and 1 from British Columbia 
which appear to be S. tincta (Walker), except that the anterior dor- 
socentrals and humeral bristles are not weakened. However, the 
terminalia agree with other specimens of S. tincta (Walker) and I 
would include the specimens in this species. 
Mr. C. W. Sabrosky (personal communication) examined the type 
of Actora ferruginea Walker and suspected it to be synonymous with 
Helomyza tincta Walker. Mr. H. Oldroyd (personal communication) 
of the British Museum of Natural History has compared the types 
of each and expressed the opinion that “they are probably conspecific.”’ 
Czerny’s (1924) use of Scoliocentra tincta (Walker) has placed this 
name in general use, and it is therefore being retained here, although 
ferruginea Walker has page precedence. 
Scoliocentra fraterna Loew 
Ficures 72 
Scoliocentra fraterna Loew, 1863, p. 27 (Centuria 3, 51).—Czerny, 1924, p. 141. 
Amoebaleria fraterna var. hyalina Garrett, 1925a, p. 4.—Czerny, 1930, p. 449. 
Mauz.—-Head similar to S. tincta (Walker), except buccal setae in 2 
or 3 irregular rows, fewer and shorter setae than in S. tincta (Walker). 
Thorax uniformly ash gray; prosternals, humeri, and scutellum 
usually becoming yellowish; evidence of 3 longitudinal vittae on 
mesonotum; chaetotaxy as in S. tincta (Walker), except that all 
bristles of mesonotum are well developed; 1 pair of prosternal bristles. 
Legs and wings as in S. tincta (Walker). 
Abdomen variable as to coloration (see Biology, below) ; pilosity less 
than in S. tincta (Walker). 
FrEMALE.—Similar to male except for terminalia. 
Lenetu.—5.0-6.0 mm. 
DistriputTion.—Alaska, Yukon Territory, Northwest Territories, 
British Columbia, Alberta, Colorado, Minnesota, New York, ‘“Hudson 
Bay,” Quebec, Laborador, Greenland; April—August. 
Brotoay.—lI have seen specimens from St. Paul Island, Alaska, (Gin 
the collection of the California Academy of Sciences) which appeared 
to be S. fraterna Loew, but the general body coloration was darker, 
the legs and abdomen being a rusty brown rather than the usual 
reddish yellow. The male terminalia, however, showed no distin- 
guishing features from the typical S. fraterna Loew. Garrett (1925) 
recognized the variation in coloration and named the variety hyalina 
to apply to those forms with the reddish yellow abdomen. I do not 
care to make subspecific designations at this time; further collecting, 
