THE CANADIAN ENTOMOLOGIST 



355 



larval cells in a row, along the 

 petiole, produces a symmetrical 

 swelling quite unlike the irregu- 

 larly nodular deformity of the 

 Potentilla gall. While a cross 

 section of this latter species, 

 at any level, will show several 

 larval cells in the stem pith, 

 just inside the ring of wood, 

 only one will of necessity be cut 

 in a similar section from the 

 strawberry gall. 



As the infected leaves 

 wither prematurely, it is 

 difificult to find the mature 

 galls, although the young 

 specimens are quite notice- 

 able. The producers were 

 secured by transplanting 

 host plants so that they 

 could be kept under ob- 

 servation. The galls were removed after the leaves had withered, 

 and were kept on earth, out of doors, during the winter. The 

 producers emerged from May 12-14. 



Fig. 30. Galls of Diaslrophus fragaria' Beutm. Upper 



figure, an immature gall; lower figure, gall from 



which the producers emerged. (Natural size.) 



DESCRIPTIONS OF NEW SPECIES OF IPID^' 

 (COLEOPTERA).* 



BY J. M. SWAINE, ENTOMOLOGICAL BRANCH, DEPARTMENT OF 

 AGRICULTURE, OTTAWA. 



IpS knausi, n. sp. — A large elongate species, length 5.8 mm., 

 width 2.1 mm. ; the sides parallel, thickly clothed with long light hairs 

 in front, on the sides and behind. Allied to emarginatus Lee, but 

 distinct in the punctuation of the discal interspaces of the elytra, 

 and the characters of the declivity. 



Description of the male: The head has the front densely 



''Contribution Irom the Entomological Branch, Department of Apiculture* 



Ottawa. 

 November, 1915. 



