80 [April, 



HOLCOCNEME, KoTlOW. 



All the species of Holcocneme are large and rather striking 

 insects, with a "'facies" of their own which when once appreciated is 

 easily recognised. Though near to Croesus, they could hardly be con- 

 founded with that genus. Their hind-legs are much less dilated (see 

 fig. 10), and they have not the peculiar parti-coloured tibisB (white at 

 base and black at apex) which are universal in the latter genus. 

 At least, this is so with the three species known to me as British, 

 which are easily distinguished as follows : — 



TABLE FOE, BRITISH HOLCOCNEME SPECIES. 



1. Clypeus slightly emarginate only. Pronotum, tegulfe, legs for the most part, 



and usually the base of the abdomen , red lucida, Pz. 



— Clypeus sharply excised. Prothorax, tegulae, and abdomen quite black 2. 



2. Hind calcar half as long as the metatarsus (fig. 10c) crassa, Fall. 



— Hind calcar short, only one-third as long as the metatarsus... 



coeruleocarpa, Htg. 



Erichsoni, described by Cameron as British, is also a Holcocneme, 

 but T never saw it. Here (in Surrey) I take lucida very frequently, 

 crassa, seldom. Coeruleocarpa I have never found, but it has been 

 sent to me occasionally for determination. 



HELP-NOTES TOWARDS THE DETERMINATION OF BRITISH 

 TENTHREDINIDM, &c. (13). 



EY THE EEV. T. D. MORICE, M.A., F.E.S. 

 NEMATIDES {continued); PONTANIA, NEMATUS. 

 Of the Nematid genera which we have still to consider, four 

 {Pontania, Nematus, Fteronus, Amam^onematus) have the clypeus emar- 

 ginate and the claws bifid ; one {PacJiynematus) has the clypeus 

 emarginate, but the claws with subapical tooth ; while two {Lygceone- 

 matus and PristipJiora) differ from all the preceding in that they have 

 a clypeus which is not emarginate but truncate. Apart from these 

 characters, each genus has a certain " facies " of its own, which with 

 practice one may learn to recognise ; but any one desiring to avoid 

 mistakes in his determinations is advised to commence always by 

 looking first to the clypeus, and secondly to the claws. 



PoNTANIA, Jur. 



This genus contains a number of small species, most of which, if 

 not all,* are gall-makers. Their saws ( ? )— considering the size of 

 the insects— are large and strong, with sheaths which viewed laterally 



* There appears to be some doubt whether. P. bipartita makes galls. 



