1609. 1 71 



HELP-NOTES TOWARDS THE DETERMINATION OF BRITISH 



TENTHREDINID^, &c. (24). 



SELANDRIADES (concluded) EMPHYTUS and TAXONVS. 



J^Y THE REV. F. D MORICE, M.A., F.E.S. 



Emphytus, Klug. 



The characters distino;uishing our numerous species of Emphytus 

 are generally pretty easy to define and recognise. One which in this 

 genus is particularly useful is the different position in different 

 species of the areal nerve (Thomson's " vena transversa ordinaria "), 

 for which see my figures in No. 2 of these papers, Ent. Mo. Mag., 

 Feb., 1903. The antenna also are helpful, presenting differences 

 not unlike those noticed above in Poecilosoma. 



I have found, however, a good deal of trouble in dealing with 

 certain questions of synonymy, and have sadly missed Herr Konow's 

 help in clearing up these puzzles. From correspondence with him in 

 the past, and from scattered passages in his published writings, I 

 know in several cases what names he thought should be substituted for 

 those hitherto generally employed. But I can sometimes only guess 

 at the grounds on which he based his views ; and I think he 

 never published or prepared for publication any definite Eevision of 

 the Genus as a whole. I have, therefore, had to find for myself such 

 solutions as I could of problems, which, were he living, I should have 

 referred to him, and I must claim indulgence from my readers 

 accordingly. 



SYNOPTIC TABLE bF BRITISH EMPHYTUS, Spp. 



1. Fore-wing with a dark cloud over the radial cell, and with the areal nerve inter- 



stitial. Abdomen broad : the propodeura and the 5th segment banded right 

 across the dorsum with white ; the last dorsal $ segment, and the last two 

 or three dorsal ? segments, also streaked with white. Antennae (apparently 

 only in the ? ) with part of the 4th joint testaceous, and all the joints 



beyond it entirely so togatus, Pz. 



(= succinctus, Kl., &c.) . 



— Wings unclouded. Areal nerve in fore-wing not interstitial. Abdomen and 



antennae coloured otherwise than as above 2. 



2. Areal nerve in fore-wing received on medius at a point much nearer to the basal 



nerve than to the 1st medial nerve 3. 



— Areal nerve received just half way between the basal nerve and the 1st medial 



nerve 13- 



3. Abdomen black, except segment 5. This is either white entirely, or at least 



shows traces of a white transverse band 4. 



— Abdomen coloured otherwise 6. 



