ENGIIM3. LATRIDIUS. 113 



Oblong, ferruginous, somewhat thickly punctulated : head with an impressed 

 frontal channel : eyes black: neck exposed, punctulated: thorax very short, 

 transverse, slightly emarginated anteriorly, the lateral margins a little rounded 

 and expanded ; the base truncate, with the angles straight, the disc convex 

 anteriorly, obsoletely channelled ; with a broad, deep, transverse fovea near 

 the base : elytra anteriorly rather broader than the thorax, with the shoulders 

 slightly rounded, the disc convex, regularly punctate-striate, the punctures 

 rather large: legs testaceous: antennae ferruginous. 



Var. (S. Lat. crassicornis. Steph. Catal. 94. No. 1003. 



The deep transverse impression at the base of the thorax, with the comparatively 



greater width of the latter to the elytra, and the exposed neck, sufficiently 



characterize this species. 



Abundant beneath the bark of trees, the roots of grass, in dung- 

 hills, cellars, &c., from August to May, throughout the metropolitan 

 district. 



Sp. 7. porcatus. Oblongus, nigro-piceus, antennis pedibusque rufo-testaceis, 

 thorace subcordato, angulis anticis rotundato-ampliatis, elytris nitidis, pro- 

 fundi punctate- striatis. (Long. corp. 1 lin.) 



Lat. porcatus. Herbst. — Steph. Catal. 94. No. 999. 



Oblong, pitchy-black, punctulated : head opaque ; mouth reddish : eyes black, 

 very prominent : thorax subcordate, emarginated, waved anteriorly, the angles 

 rounded and ample, the sides oblique, deeply margined: the disc opaque, 

 convex, with an abbreviated rudimentary channel, and a transverse impression 

 towards the base : elytra as broad again at the base as the thorax, with the 

 shoulders elevated, the sides towards the middle ample, the apex rounded, the 

 disc moderately convex, transversely impressed anteriorly, shining, regularly 

 and deeply punctate-striate : body piceous beneath : legs and antenna? fer- 

 ruginous. 



Var. (i. Lat. ferrugineus. Steph. Catal. 94. No. 1000. 



This variety differs in being entirely of a ferruginous hue : it also occurs of a 

 testaceous or pale colour, with the head more or less obscure :— in some of the 

 piceous examples the suture and margins of the elytra are often ferruginous. 



Kybes has given a long history of the metamorphoses of this species in the second 

 volume of Germars' Magazine, accompanied by figures, whence we learn 

 satisfactorily that the present genus belongs to the Necrophaga ; a point how- 

 ever previously ascertained by De Geers' observations on La. lardarius. 



Also very common throughout the metropolitan district, fre- 

 quenting the same haunts as the last. 



Sp. 8. rugosus. Oblongus, niger, ore antennis pedibusque ferrugineis, thorace 

 late, brevi, antice subangustiore, postice transversim profundi impresso, elytris 

 obsoletius punctato-striatis. (Long. corp. 1 lin.) 



Lat. rugosus. Herbst. Col. v. 6. pi. 44. j£ 3. Cc. ;— teste Gyllenhal 



