NEW BRITISH SPECIES, ETC., IN 1863. 67 



42. Helophorus arvernicus (Rey), Mulsant, Supplement 



to the Palpicornes, published in his " Coleopteres 

 Securipalpes" in 1846; G. R. Crotch, Zool. 8611 

 (1833) '' arvonicusr 

 Mr. Crotch says tliat all tlie specimens he has seen (in 

 England, I presume) of H. ^' pumilis,'" Er. (pumiUo), be- 

 long to this species, and that the true II. ^'pumilis'' (pii- 

 milio) is a much shorter and broader insect. He adds, 

 also, that the present species may be recognized from our 

 other indigenous species by the sub-carinate interstices of its 

 elytra. 



Mr. Waterhouse informs me that he now believes the 

 insect entered in his Catalogue as H. pumiUo, Er., is //. ar- 

 vernicus, Muls., the original description of \Yhich species he 

 was, until very recently, unable to consult. 



43. Philhydrus maritimus, Thomson, Ofvers. af Vet. 



Ac. Forh. 1853, 51, 2 ; Skand. Col. ii. 96, 2. 

 I have taken this species in brackish water at Gravesend. 

 It is very like P. testaceus, Fab., but is rather more shiny, 

 a hide narrower, and more oblong, the punctuation not quite 

 so close, and a trine more distinct ; the palpi are entirely 

 testaceous (not having the penultimate joint pitchy), and the 

 club of the antenn?s not so black ; the head also is only 

 slightly infuscate in the middle, whilst in testaceus it is 

 decidedly black, with the sides of the clypeus testaceous. 

 According to Thomson's description (loc. cit.) the femora 

 appear to differ in colour in the two species, being black 

 with the extreme apex pale in testaceus, and blackish with 

 the upper side of the apex testaceous in viaritimus, but these 

 last-mentioned minute differences of colour can scarcely be 

 relied upon as constant, and the insects could only present 

 the proper tone when alive. 



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