THE CANADIAN ENTOMOLCJGIST. 



hind tibiae ciliate but with two longer bristles near the middle ; tarsal claws 

 and pulvilli considerably longer in the male than in the female. 



Wings hyaline, becoming somewhat fuscous toward base. Vein M^^j 

 with one to five bristles near base ; the medium cross vein quite distinctly 

 S shaped; there is no appendage at bend of Ri,2; the anterior end of 

 medium cross vein is situate at V3 distance from the bend of R1+2 to radio 

 medial cross vein. 



Abdomen black and polished on the whole of first segment and on 

 posterior margins of the other segments ; the narrow anterior margins of 

 segments 2, 3 and 4 white pollinose ; the median fascia irregularly white 

 ])ollinose on black ground ; sides of segments 2 and 3 sometimes 

 yellowish. A pair of median marginal macrochœtae on segments i and 2, 

 a row of very long marginals on segment 3 ; no discal bristles on segments 

 2 and 3 ; all the segments are thickly covered with rather long fine hairs, 

 which, especially medially, are erect and not proclinate ; fourth segment 

 covered on disc with fine bristles about f/^ length of marginal macrochsetae 

 on segment 3. 



Described from 18 males and 18 females bred in the Division from 

 the Spruce Budworm (Tortrix fiiniiferana Clemens). The localities are 

 as follows : Two males and one female from Maniwaki, Province of 

 Quebec; 16 males and 17 females from Duncans, British Columbia, 

 Canada. The adults issued from both larvîé and pupge, but principally 

 the latter, of the host. Type female from Duncans, B.C , and Ty-}^ co-types 

 deposited with Division of Entomology, Experimental Farms, Ottawa ; 2 

 co-types a male and female from Duncans, B. C, deposited in the United 

 Stales National Museum, Washington, D. C. 



Amobia distincta Towns., and Senotainia trilijieata V. ..^ \V. 

 In a recent attempt by the writer to determine with the aid of 

 Coquillettes "Revision" some Tachinids that have since proved to Seno- 

 tainia trilineata V. & W., considerable difficulty was experienced in 

 deciding whether the species was the above mentioned or Amobia distincta 

 Towns.; moreover reference to the original description did not materially 

 facilitate the determination. From an examination of a l.irge series of 

 both species in the United States National Museum it was found that they 

 are abundantly distinct and that the generic separation is fully justified. 

 The following is a table, which it is hoped may prove useful, of some of 

 the more obvious differences between the tv\'o species : — 



