THE CANADIAN ENTOMOLOGIST 



B.C., both from local animals and from cattle imported from 

 Eastern Ontario, in the previous December, were also H. bovis. 

 Two larvae collected at Mount Lehman, B.C., proved to be H„ 

 Uneata. 



As this discovery of H. bovis in Canada was of unusual interest,. 

 I examined the specimens of the collection of the Division of Ento- 

 mology. The genus was represented by four specimens, which 

 appeared to me to be H. bovis, but in order to be certain I submitted 

 them to Prof. G. H. Carpenter, of Dublin, Ireland, who kindly 

 examined them, and states that they are all 77. bovis. These 

 specimens are from the following localities: New Cornwall. 

 (Lunenburg Co.), N.S., 1913; Brockville, Ont., 1913; St. Henri 

 Levis, Que., 1911; and Southern Alberta, 1910. 'Our collections 

 also contain larvae of //. bovis from East End, Sask., 1913, and of 

 II. Uneata from Sarnia, Ont. 



In view of the fact that II. bovis is evidently widely distributed 

 in Canada, occurring, as our records indicate, from the Atlantic 

 to the Pacific, it would appear to be extremely probable that this 

 species occurs with //. Uneata in the United States. The economic 

 importance of the species renders the state of uncertainty of the 

 presence or absence of this species all the more remarkable, and 

 further investigation would be very desirable. The adults of the 

 species have distinctive characters. II. Uneata is smaller than 

 II. bovis, it has black hairs on the head and on each side of the 

 prothorax is a tuft of whitish hairs; the disc of the thorax is almost 

 bare and striped longitudinally. The hairs on the head of II. bovis 

 are yellow and a band of yellow pubescence stretches across the 

 thorax in front. The larva* are readily distinguishable by means 

 of the spiny cuticular armature. Mr. C. W. Johnson reared II. bovis 

 from larvae obtained in June, 1910, at Manchester, Vt. (Psyche, 

 XVII, Dec. 1910, p. 231). 



ON THE PREDACEOUS HABITS OP SCATOPIIAGA: A 

 NEW ENEMY OF MUSCA DOMESTIC A. 



BY C. GORDON HEWITT, D.SC, F.R.S.C., OTTAWA. 



In view of the increasing attention which is now being paid 

 to the character of the prey of certain groups of Diptera, the 

 following notes on the feeding habits of Scatophaga stcrcoraria L. 

 will be of interest, -apart from their economic significance. While 



