32 



also four species of the Tenthredinidce, viz., Hoplocampa 

 plagiata, Klug., Blennocampa melanocepJialus, Fab., Lyda 

 flaviventris, Cam., and Janus femoratus, Klug., and made the 

 following remarks : — 



\. MononycJius pseudacori, F., feeds on Iris Pseuddcorus 

 the yellow iris, flag, or corn flag. 



2. Lina longicollis, Luf., is not at all a common beetle, 

 but occurring locally, and sometimes in profusion on alder 

 or poplar. 



3. Hoplocampa plagiata, Klug., is an exceedingly rare 

 sawfly, there being only three known captures recorded ; one 

 by the Rev. T. A. Marshall, at Boxhill, in 1870; one by 

 myself, a female, at Weybridge, May, 1884; and the present, 

 specimen, also by myself, at Chingford, May, 1885. 



4. Blennocampa melanocephalus, Fab., appears to be gene- 

 rally distributed in England and Scotland, but not common ; 

 this specimen being taken at Chingford, May, 1885. 



5. Lyda flaviventris, Cam., very rare, this being according 

 to Cameron, the finest specimen captured in this country, 

 there being only three recorded captures previously. This 

 specimen was taken at Boxhill, May, 1884, by myself. 



6. Janus femoratus. This is also an uncommon sawfly, 

 and was bred from the almost extreme ends of the sallow, 

 into which the larvae bore, and feed on the pith undergoing 

 their final metamorphosis in the stem. This insect has also been 

 known to attack a young oak, burrowing under the bark, and 

 causing small gall-like excrescences, in which, unlike most of 

 the Tenthreainidce, it changes, instead of dropping into the 

 ground to pupate. 



Mr. T. W. Hall exhibited a remarkable variety of 

 Abraxas grossulariata, and said it was the only variety bred 

 from 343 larvae, 190 of which were infested either with the 

 Ichneumon Cassinaria vidua, Gr., which was considered rare, 

 or the Dipteron Hyctodissa lucorum. Fall. ; specimens of 

 both species, mounted by Mr. Billups, were also exhibited. 



