108 Mr. P. Cameron 07i some 



Brischke and Zaddach,* in their monograpli of the 

 European Ilylutoma, appear to regard it as a good 

 species, but one of Avhich they had seen no examples. 



Against the view that Stephens! may be a distinct 

 species from Pagana must be stated the fact that the 

 yellow on the thorax and legs is not constant in position 

 or quantity ; so that in the absence of a greater number of 

 specimens to judge from, and of any information about its 

 habits, its specific distinctness must be considered doubtful. 

 But if not a species, I should certainly consider it as a 

 variety or race rather than an aberration. 



Pagana is one of the most widely distributed of sawflies. 

 It is found all over the Palrearctic, also in the Oriental 

 region, while in the Nearctic it occurs as far south as 

 Georgia. 



Mr. Smith (Trans. Ent. Soc. 1874, p. 375) describes a 

 species {H. similis sibi) from Japan, which, according to 

 him, differs only from Pagana in having a yellow spot 

 beneath the wings. If Similis is to be considered a good 

 species, then StepJiensi may well be regarded the same, 

 if it be not identical with Similis. 



The luteous British species of Hxjlotoma may be distin- 

 guished as follows : — 



A. Legs and thorax entirely bluish-black . . . . Pagana, Pz. 



B. Legs more or less luteous. 



a. Pleurre marked with yellow. 



Legs for the greater part bluish-black ; hinder 



tarsi not annulated with black . . . . Stejjhensi, Leach. 



Legs for the greater part yellow ; binder 



tarsi annulated with black . . . . Rosce, L. 



b. Pleura? without yellow. 



Pemora only black at the apex ; anterior 



wings with a fascia below the stigma . . Cyaneo-crocea, Forst. 

 Pemora quite black, wings without a fascia Melanochra, Gmel. 



Nematus nigro-lineatus. Cam. 



Two or three years ago I collected a lot of the leaf- 

 rolling larvce of Nematus crassulus, Dbm., and placed 

 them in a bottle by themselves. In the following spring 

 the imagoes of Crassulus duly ap])eared, and along with 

 them another and very different species, whose appearance 

 in the bottle I could not account for, as I had been very 



* Schr. Ges. Konig. 1862, 108. 



