British Species of Allot rincs. 53 



On the British Species of Allotrinae, with descriptions 

 of other new species of Parasitic Cynipidae. By 

 P. Cameron. Communicated by John Boyd, Esq. 



{Received November 22nd, r888.) 



Neither in this country nor abroad have the Parasitic 

 'Cynipidae attracted much attention, and thus our knowledge 

 of the species is comparatively limited. That the group is 

 numerous in species there can be no doubt, but their correct 

 determination is a work of some difficulty, chiefly owing to 

 the shortness of the descriptions of Hartig, who is the 

 entomologist who first studied the species to any extent. 

 Until his types have been examined by the aid of the works 

 of Thomson and other writers, there must be always some 

 doubt regarding many of them. The Allotrin?e will probably 

 be found to be more difficult of specific discrimination than 

 any other section of Parasitic Cynipidae, from the absence 

 of much difference in sculpture or great variation in structure, 

 while also they are very numerous in species, and mainly 

 distinguished by differences in colour, in the form of 

 the antennae and in the alar neuration. As a sub-family 

 they are to be known by the broad radial cellule, the areolet 

 not being situated opposite its base : the first and second 

 cubital cellules are never complete and the cubitus (when 

 indicated) issues from the middle of the transverse basal 

 nervure ; the abdomen has the second segment the largest ; 

 the body (including the scutellum) is impunctate, and the 

 hind tibiae have only one spur. One of the most recent 

 writers on the subject (Mr. W. H. Ashmead, Trans. Am. 

 Ent. Sac, XIII., p. 64) includes yEgilips Hal. in the 

 Allotrincs ; but the entire structure of that genus comes so 

 near the Figitince and especially AnacJiaris, that I cannot 



