SARCOPHAGA AND ALLIES 169 



broadly excised in a U-shape, bordered along the in- 

 ner edge with a close row of short bristles. 



Legs black; middle femur with a fairly well de- 

 veloped comb below on the hind side; middle tibia 

 with two bristles on the outer front edge; hind tibia 

 with rather sparse villosity, longest on the mesial side. 



Wings subhyaline, no costal spines; third seg- 

 ment of costa much longer than the fifth; first vein 

 bare; second hairy about halfway to crossvein. 



Female. Front .327 of head (average of three, 

 — .320, .329, .333); the usual orbital bristles; outer 

 verticals well developed; bucca fully one-third the 

 eyeheight; no apical bristles on scutellum; genital 

 segment black, with oval aperture surroimded by 

 dense bristles; middle femur not with comb; middle 

 tibia with three bristles on outer front side ; hind tibia 

 not villous. 



Length 8-10 mm. 



Eleven males and three females. One male and 

 one female from East Eddington, Me. (Hough col- 

 lection) ; 5 males Melrose Highlands, Mass. (H. E. 

 Smith) ; two males N. Saugus, Mass. (H. E. Smith) ; 

 one male Lunenburg, Mass., paratype) collected by 

 R. T. Webster, sent me by R. R. Parker; one male 

 and one female reared from MaJacosoma disstria in 

 Ontario by Prof. Lawrence Caesar ; one male Friday 

 Harbor, Wash., collected by the author; one female 

 Southport Creek, B. C, R. P. Currie collector (Xat. 

 Mus. ) . 



Holotype. — JNIale, in collection of Mass. Agri- 

 cultural College. Paratypes in National Museum, 

 etc. 



Mr. Parker publishes a note by Prof. Caesar on 

 this species, from which it appears to be a parasite of 

 importance upon the Forest Tent Caterpillar. 



