102 MANDIBULATA. — COLEOPTERA. 



The small size of this insect, with its somewhat depressed body, finely punctured 

 thorax and pale elytra distinguish it from its allies. 

 Found near London. 



Genus CLX. — Monotoma, Herbst. 



Antenna shorter than the thorax, rather stout, the basal joint obconic, very 

 large: the second smaller, the seven following very short, granular; the 

 tenth large, globose, with an acute appendage at the tip. Palpi unequal, 

 sub-filiform ; the maxillary with the last joint elongate, attenuated to the 

 apex, truncate: head large, porrect, triangular: eyes globose, prominent: 

 the vertex with an angular prominence: thorax oblong-quadrate, truncate 

 anteriorly, with the angles acuminated, prominent, the lateral margins crenu- 

 lated : body oblong-ovate, depressed ; elytra broader than the thorax at the 

 base ; the apex truncate ; the abdomen exposed at the tip : legs short ; femora 

 clavate. 



Monotoma differs from Rhyzophagus by having the sides of the 

 thorax crenulated; the thorax itself oblong-quadrate, and con- 

 siderably narrower than the base of the elytra, which latter are 

 very distinctly truncate : the palpi are less filiform, and the femora 

 manifestly clavate : the head is not so suddenly narrowed before 

 the eyes, and the body is more depressed: — from the following 

 genera its truncate elytra distinguish it with facility. 



Sp. 1. picipes. Nigra, opaca, subhispida, antennis pedibusque rufo-ferrugineis, 



elytris crenato-striatis, thorace postice bifoveolato. (Long- corp. 1—1^ lin.) 

 Mo. picipes. Herbst.— Steph. Catal. 91. No. 979. 



Dull obscure black: slightly hispid, with the antennae and legs rusty-red, the 

 thorax oblong-quadrate, with its lateral margins finely crenated, the disc 

 slightly convex, rather deeply punctured, with two oblong, rather oblique, 

 foveola; near the base : elytra broader than the thorax, with the apex truncate ; 

 the disc slightly convex crenate-striate, with the interstices transversely rugulose 

 and clothed with very short cinereous hairs. 



Slightly variable in colour : — arising from immaturity. 



Taken beneath the bark of trees ; in putrid wood; also in houses 

 and windows, but not very abundantly. Found in Norfolk, Devon- 

 shire, Battersea-fields, and other parts of the metropolitan district* 

 " Petworth, Sussex, September." — Mr. Westwood. 



Sp. 2. angustata. Angustata piceo-nigra, antennis pedibusque f err ugineis, tho-> 



race postice impresso. (Long. corp. § lin.) 

 Co. angustata. Marsham MSS.—Mo. angustata. Steph. Catal. 92. A r o. 980.. 



