272 [December, 



Many collectors may probably find it in their boxes mixed with 

 vagus, which it very closely resembles. But it may be picked out at 

 once by simply examining the hind metatarsi, these being always 

 yellow in vagus, bnt dark rnddy brown (like the apex of the tibia) 

 both in (^ (^ and ? ? of larvatus. A more important though less 

 obvious character is the structure of the clypeus in larvatus. Its apex 

 in the centre projects into a distinct though blunt tubercidation or 

 " tooth," and this is accompanied by two other much smaller denticu- 

 lations, one on each side of it ; so that the whole apex may be called 

 tridentate. Other more difficult characters are mentioned by Wesmael, 

 but the above suffice to distinguish the species. 



Larvatus is a good deal smaller than normal vagus ; and I 

 remember consulting Mr. Saunders on this account, as to my first 

 capture of the former insect, and asking if he did not think it must 

 be something distinct. He did not, however, encourage the idea ; and 

 not being then acquainted with larvatus, nor with Wesmael's descrip- 

 tion of it, I simply placed the specimen in my collection as a vagus 

 without looking for other differences, and acted similarly as to the later 

 captures. 



The fj , which was luiknown to Wesmael, has excisions like those 

 of vagus under the antennae ; but from the small size of the insect 

 these are easily overlooked, and I must confess with some shame that 

 I sent Herr Kohl several of my ^ ^, both British and foreign, as 

 small ? ? of vagus. I may add that I have taken larvatus^ and ? 

 several times at Innsbruck and Bozen in the Tyrol, and once in North 

 Grermany (Bremen) . 



The species is not mentioned by Thomson, so it is probably not 

 a Scandinavian form. How far north it goes in this coimtry I cannot 

 say, but it wovald be interesting to know. It seems to be well knoTXTi 

 in Central Europe, and is duly tabulated in Dr. Schmiedeknecht's 

 recent work Hijnienoptera Mittel-Euro2Ja's. 



Crabeo (Clytocheysus) planiprons, Thoms. 



This is one of the several fomis which used to be confounded 

 under the old name cephalotes in our List. (See Ent. Mo. Mag., 1906, 

 p. 173. I need not repeat Mr. Saunders's full description, there given, 

 of its characters). 



I took a single $ in Augxist, 1894, at Hillmorton in Northampton- 

 shire. The specimen till now has been mixed with cavifrons in my 

 collection, but was fortimately detected by Herr Kohl. I have never 

 again found it in England, bvit often in Switzerland. 



Brunswick, Woking : 



November, 1910, 



