the British Atomarice. 11 



the microscope) of being terminated at either extremity by a raised 

 costa. It is one of the rarer species, at any rate towards the 

 south : my specimens are from the north of England ; and it is 

 recorded in Mr. Murray's catalogue to occur in the Dalmeny 

 woods, near Edinburgh. 



Sp. 19. Atomaria Hislopi, n. sp. 

 A. Oblongo-ovalis, antice et postice subacuminata, nigra, nitidis- 

 sima, subglabra, parce subtiliterque punctata ; prothorace 

 amplo, valdeconvexo, postice latiusculo immarginato et fovei 

 medid transversd profundi impresso, ad latera subtilissime 

 marginato atque vix rotundato ; elytris minus distincte et 

 parcius punctulatis, concoloribus ; antennis pedibusque fer- 

 rugineis. 

 Long. Corp. lin. 1. 



A. Oblong-ovate, exceedingly shining, convex, nearly glabrous 

 (being very sparingly beset with a short, decumbent, and cine- 

 reous pubescence), and black. Prothorax large, slightly dilated 

 in the middle (though, nevertheless, wide posteriorly), exceedingly 

 convex, and with a deep (though somewhat short) transverse cen- 

 tral fovea behind ; perfectly immarginate along its posterior edge 

 (which is subsinuated, — that portion moreover which is imme- 

 diately behind the fovea being a good deal raised), though very 

 delicately margined at its sides, — which are but very slightly 

 rounded. Elytra convex, and rather more finely and sparingly 

 punctured than the prothorax ; broadest about the middle (being 

 narrowed and rounded off at the shoulders), and rather attenuated 

 posteriorly ; immaculate. Antennce and legs ferruginous ; with 

 the femora of the latter infuscated towards their base. 



A large, robust, and well-marked Atomaria, somewhat resem- 

 bling, at first sight, the A. turgida of Erichson. It is, however, 

 abundantly distinct, specifically, from that insect ; from which it 

 may be at once known, not only by its superior bulk and more 

 acuminated outline (both before and behind), but likewise by its 

 uniformly black, brighter, subglabrous and less punctured surface, 

 and by its more ample prothorax, — which is immarginate (though 

 deeply impressed in the centre) behind. In its general habit it has 

 more in common, I think, with the A. nigripennis than with any 

 other of our British species ; nevertheless its much larger bulk, 

 and the sinuated hinder margin of its prothorax, would remove it 

 into the vicinity of the A. analis and turgida. In its posteriorly 

 immarginate prothorax it recedes from most of the Atomarice with 

 which I am acquainted. 



