128 THE CANADIAN ENTOMOLOGIST 



Sapromyza pernotata, sp. n. 



Male. — Similar to fraterna in colour and markings. 



Differs in structure of the male hypopygium from fraterna, the thoracic 

 chaetotaxy being the same. The eighth tergite has the lateral extension with 

 a short process the apex of which is produced in the form of a slightly forwardly 

 directed sharp thorn at its anterior angle, while in fraterna this tergite has a 

 broader process which has a backwardly directed, curved sharp thorn at apex 

 anteriorly. The small furcate process mesad of the above process is differently 

 shaped in the two species. In fraterna there are two subequal thorns, while in 

 pernotata on is much larger than the other. 



Length 4 mm. 



Type and one male paratype. — Cedar Lake, 111., August 4, 1906, in a 

 tamarack bog. 



Type in collection of Illinois State Natural History Survey. 



Sapromyza imitatrix, sp. n. 



This and the next species belong to the same group as bispina Loew, which 

 contains species with the following characters: Entire body and legs yellowish 

 testaceous, wings unmarked, the cross-veins usually darker than the others, 

 but the adjoining membrane not infuscated; arista with short hairs; thorax 

 with 4 pairs of strong dorsocentrals and well-developed acrostichals; hind tibia 

 of male with soft erect hairs on antero- or postero-ventral surface or on both; 

 and the apical abdominal sternite with two long slender processes. 



Male. — Differs from bispina in having the processes of apical sternite 

 almost uniform in width, rounded at apices; the hind femur with long, fine hairs 

 on entire length of both antero- and postero-ventral surfaces, and the hind 

 tibia with long, fine hairs from base to well beyond middle on postero-ventral 

 surface, while the antero-ventral surface is bare. 



Female. — Differs from bispina in having the prosternum bare, and the 

 hind femur with a long setulose hair near apex on postero-ventral surface. 



Length 4-4.5 mm. 



Type.- — Male, and one male paratype, Clementon, N.J.,May 30, 1895'. 

 Allotype, Anglesea, N. J., July 19, 1891. Paratypes, one male, Riverton, N. J., 

 July 7; one female, DaCosta, N. J., June 4, (C. W. Johnson). 



Type in collection of C. W. Johnson. 



Sapromyza fratercula, sp. n. 



Male. — ^Differs from imitatrix in having the hind femur with very few 

 sparse hairs on postero-ventral surface, and those on antero-ventral longer 

 and stronger on apical half and almost absent on basal; the hind tibia with 

 fewer hairs on postero-ventral surface and some at base on antero-ventral ; the 

 eighth tergite with a slight ridge on lateral extension posteriorly; and the small, 

 median thorn at base of the large, slender forwardly directed hypopygial pro- 

 cess furcate instead of simple. 



Length 5 mm. 



Type and two male parat>pes, Powderville, Mont., June 15, 191(), (R. 

 Kellogg and M. Hanna). Type in collection of U. S. Bureau of Biological 

 Survey. 



