268 THE CANADIAN ENTOMOLOGIST. 



the female ; hypopygium of male prominent, the unchitinized portions 

 reddish tinged. Length, 9 mm. 



Described from one male and one female received from Dr. C. 

 Gordon Hewitt, Division of Entomology, C. E. ¥., Ottawa, Canada. 

 Specimens bred by Mr. Arthur Gibson from larvse of Hyphoraia parthenos 

 Harris, received from Mr. H. Dawson, Hymers, Ontario, Canada. Type, 

 the female, No. 13,387 of the United States National Museum collection. 

 Male co-type in collection of Division of Entomology, Department of 

 Agriculture, Dominion of Canada." This species, which is very distinct, 

 resembles Lydina areas Walk, in colour characters, but it is not so highly 

 polished. 



Schizoiachina Walk, and Acrofiarista Town. 



From a lot of the needles of Finns rigida Mill, infested by larvae of 

 the Tineid ParalecJiia pinifoliella Chamb., collected by Mr. W. F. Fiske 

 near Lowell, Mass., there issued, with some interesting hymenopterous 

 parasites, a number of specimens of a small Tachinid. By the table to 

 genera in Mr. Ccquillett's " Revision," these specimens were determined 

 as Sc/iizotac/iina, but on comparison with a male specimen of S. convecta 

 Walk., in the collection of the Boston Society of Natural History, they 

 were found to differ from the latter species in having the vein M1+2 niissing 

 beyond the bend. The specimen of convecta had M^^g distinct to the tip. 

 Mr. Coquillett kindly examined the specimens in the United States 

 National Museum collection, and found nine specimens which had been 

 placed in the convecta series, having M1+2 obsolete beyond the bend. Since 

 then I have examined these and find that they agree with my specimens. 

 In all I have examined twenty-eight specimens of the form described 

 below and six of the form which I identify as cojivecta. The species may 

 be separated as follows : 



Vein Mi+2 distinct to the margin of the wing S. convecta Walker. 



Vein Mi+2 missing beyond the bend S. vitinervis, n. sp. 



Schizotachina vitinervis, n. sp. (Fig. i, wing ; 2, head.) 

 Black, less frequently partly or largely reddish, head and thorax 

 bluish-gray pollinose, abdomen polished, only the narrow bases of the 

 segments white pollinose ; legs somewhat polished, thinly dusted with 

 grayish pollen ; palpi yellow ; third antennal segment in male divided 

 longitudinally, in the female more or less broadened and flattened ; vein 

 Mi + 2 entirely wanting beyond the bend. 



Head at least twice as broad as long, front in the male broad, at 

 narrowest part at least one and one-half times as wide as the eye; frontal 



