1914.] 14 g 



7 (8) Scopus pale above, yellow or brownish yellow. 



(Clypeus irregularly punctured ; apical impressions of 3rd 

 and 4th abdominal segments distinct, normal)... helvola, Linn. 



8 (7) Scopse black or dark blackish fuscous above. 



9 (10) Face largely clothed with pale whitish or white hairs, the clypeus 



on either side of the smooth median line somewhat evenly 

 punctured, much as in varians ; apical impressions of the 3rd 

 and 4th abdominal segments in some aspects very distinct, and 

 not or hardly obliterated even in the middle, not abnormally 

 wide (vere long) mixta, Sen. 



10 (9) Face sometimes almost entirely or altogether clothed with black 

 hairs, below the antennae often with sordid fuscous hairs ; 

 puncturation of clypeus sparser and more irregular ; apical 

 impressions of the 3rd and 4th segments much effaced or in- 

 distinct medially, and abnormally wide (vere long) occupying 

 by far the greater part of the segments, even when these are 



not at all retracted synadelpha, P. 



(ambigua, P.). 



The $ of mixta, as stated above, is not known to me, while in this 

 sex the others are so easily separated that it is unnecessary to tabulate 

 them here. I am greatly indebted to Herr Alfken for calling my 

 attention to the existence of A. mixta in England. 



Park Hill House, 



Paignton : 

 May 10th, 1914. 



HELP-NOTES TOWARDS THE DETERMINATION OF BRI 

 TENTHREDINID&, &c. (32— Continued.). 

 BY THE REV. F. D. MORICE, M.A., F.E.S. 



(Concluded from page 52.) 

 Pictura. similar to that of Tenthredopsis certainly gives useful 

 specific characters in other genera, though, like all colour-characters, 

 it seems to vary occasionally in individual specimens of the same 

 species. Probably we may assume, though we cannot actually prove 

 it, that the same is the case here : and in that case, we have in it a 

 great number of definite and easily observed characters — for dis- 

 tinguishing varieties at least, and probably species. Forms in which 

 it is reduced to a minimum, appealing practically only on the face and 

 scutellum, can be separated easily and with some confidence from 

 forms where it is copious on all parts of the head and thorax. With 



