24 MANDIBULATA. COLEQPTERA. 



Ham and Plaistow marshes, common." — A. Cooper, Esq. " In 

 putrid birds (near Swansea)." — L. W. Dilhvyn, Esq. 



Sp. 5. dispar. Fusca obscura, capite tlioraceque pubescens, hoc subemarginato 



tuberculato, elytris trilineatis, pilosis. (Long. corp. 4g lin.) 

 Si. dispar. Illiger. — Oi. dispar. Steph. Catal. 76. No. 811. 



Rather less than the last ; obscure fuscous : head and thorax as in the preceding, 

 but more densely pubescent; elytra of the same form, but throughout clothed 

 with depressed cinereous pubescence, with three elevated lines, of which the 

 exterior are scarcely arcuated ; and the ordinary tubercle more elevated and 

 larger than in Oi. sinuata. 



The male has the apex of the elytra obtusely truncate: the female has it slightly 

 emarginate. 



The pubescent elytra (exclusively of other characters) at once discriminate this 

 species from the preceding. 



Gyllenhal refers the Silpha opaca of Marsham to this species ; in which par- 

 ticular he has lately been followed by Mr. Dillwyn, but incorrectly; the 

 Marshamian insect, which is in my possession, being evidently the female of 

 the preceding species. 



Rare : four or five specimens have been captured, I believe, in 

 Norfolk. 



Genus CXXV. — Silpha Auctorum. 



Antenna as long as the thorax, gradually increasing from the base to the apex, 

 forming a quadriarticulate club, composed of nearly equal joints, the ter- 

 minal one being rather the largest, and conic obtuse : head small, inflexed : 

 eyes rather prominent : thorax semicircular, generally truncate anteriorly ; 

 elytra entire, generally carinated, with a deep marginal canal : body oval, 

 slightly convex : legs moderate, rather short ; anterior tarsi dilated in the 

 males. 



The gradually thickened antennae witha quadriarticulate capitulum 

 of nearly equal joints, with the slightly convex body, generally di- 

 vested of pubescence above, usually truncate anterior margin of the 

 thorax, and less rugose surface, are the principal external marks of 

 distinction between this and the preceding genus ; and from Phos- 

 phuga it is sufficiently distinguished by the quadriarticulate clava 

 of the antennae. 



A. With the thorax emarginated anteriorly. 



Sp. 1. quadripunctata. Ovata, nigra glabra, thoracis limbo clytrisquc pallidis, 



puncto baseos medioquc nigris. (Long. corp. 6 — 7 lin.) 

 Si. 4-punctata. Linnc — Don. ii. pi. 86.fi 2. Steph. Catal. 76. No. S12. 



