publication of " Jurinean " Genera of Hymenoptera. 379 



— Holcocneme Knw. may therefore still be used for the 

 group which includes lucida Pzr. and crassa Fallen. 



Croesus Leach, with Type septentrionalis L. [cited by 

 Rohwer US. Dp. Agr. (Ent.) Tech. Ser. 20. 77, 97, 99 

 (1911)] must therefore sink as synonymous with Nematus 

 Jrn. — * Nematus Knw. is a different genus, and has accord- 

 ingly been renamed by Rohwer Nematinus, with Type 

 ahdominalis Pzr, 



[The second Nematus of the Erlangen List is capreae. 

 In Systema Naturae (ed. 10) we find Linne describing a 

 larva as cap-eae, saying that he did not know the imago ; 

 in the 12th edition Linne repeats his description and adds 

 a reference to Tenthredo salicis Fn. Suec. 1752. This 

 Tenthredo salicis we now find is the well-known and 

 very remarkably coloured larva of a very common 

 Pteronidea, which has been admirably figured, together 

 with its imago, by Goedart, and these figures, and 

 also others representing the same species in other 

 works, are referred to in the synonymy of the Fauna. 

 Now, reverting to the 10th edition, we find an imago 

 described as salicis, evidently the imago of the same species, 

 and here again Goedart's and the other figures are referred 

 to ; the imago is no doubt the species universally known as 

 T. salicis L., this is attached to Salix, and has the character 

 mentioned by Linne of a black stigma, which is exceptional 

 in Pteronidea. We infer from these facts that capreae L. 

 is a synonym of salicis L., and that the Pachynematus re- 

 ferred by many authors to '^capreae L. {—trisignatus Forst.), 

 chiefly on the authority of a figure in Panzer, is a different 

 species. Panzer's figure (65"8), from its very short an- 

 tennae and other characters, appears to represent, not 

 a Pachynematus Knw., nor a Pteronidea Rwr., but 

 an Amauronematus Knw. (perhaps A. vittatus Lep.). 

 The mistake appears to have been partly due to 

 the omission by Linne (in ed. 12) to repeat his remark 

 as to the black stigma. Fabricius and Gmelin, under 

 capreae, describe an imago with pale stigma, parti- 

 coloured mesonotum, and other characters which agree 

 with Panzer's figure, but are quite inconsistent with 

 Linne's own account of salicis. Also, the true salicis is 

 attached to Salix, but Fabricius and Gmelin add a state- 

 ment that this larva devastates the Red Currant (ap- 

 parently confusing it with ribesii, or some such species. 



