ELATERID.E. LUDIUS. 263 



Genus CCXXIV. — Perimecus, Dilkvyn. 



Antenna; rather long,, pilose; the basal joint slightly bent and thickened, and 

 subclavate; the second and third very small, nodose; the remainder com- 

 pressed, obtusely serrated, the terminal joint being longest and obtuse. 

 Mouth porrect : head rounded ; forehead depressed : eyes small : thorax nar- 

 rowed anteriorly, moderately convex, with the posterior angles rather pro- 

 minent, acute, carinated: elyh-a very long, gradually attenuated from the 

 base to the apex, slightly convex: femora small, compressed; tibia short, 

 simple ; tarsi with entire joints. 



Perimecus is to be distinguished from Elater by having the 

 second and third joints of the antennae short, and the terminal one 

 elongate and slender ; the elytra also are very long, and the body 

 is considerably attenuated posteriorly. 



Sp. 1. fulvipes. Nigro-piceus, pubescens, antennis fusco-testaceis, pedibus fer-* 



rugineis, elytris tenue striato-punctatis. (Long. corp. 6 — 10 lin.) 

 El. fulvipes. Herbst.—N. G. fulvipes. Steph. Catal. 124. A r o. 1262. 



Pitchy-black, pubescent, punctate; the punctures on the head and thorax 

 largest : elytra regularly but somewhat faintly striate, the striae composed of 

 distinct impressions, the interstices very sparingly punctured : body beneath 

 rufo-piceous : legs ferruginous: antenna? fuscescent. 



Extremely variable in size and slightly so in colour, the latter probably result- 

 ing from the more or less mature state of the insect : — one of my gigantic 

 specimens of the female has the thorax very rugose, punctate, and somewhat 

 obscure. 



Found in rotten wood, and beneath the bark of decayed trees, 

 in woods and hedges, and rather abundantly within the metro- 

 politan district; also near Edinburgh. " Black- Hall Wood." — 

 T. C. Hei/sham, Esq. " Epping." — Mr. Doubleday. " Very 

 common at Bottisham; the larvae destructive to trees." — Rev. L. 

 Jenyns. " Near York." — W. C. Hewitson, Esq. " Among grass 

 in woods, and sometimes buried in the timber of decaying oaks 

 (near Swansea).' 1 — L. W. Dillzvyn, Esq. 



Genus CCXXV. — Ludius, Latreillc. 



Antennae rather long, acutely serrated, compressed, the basal joint somewhat 

 robust; the second and third very small, subglobose; the fourth to the 

 tenth subtrigonal, the inner angle considerably produced, gradually dirai- 

 Mandibulata. Vol. III. 31st Dec. 1830. t 



