90 MAND1BULATA. — COLKOPTERA. 



Sp. 5. rufipes. Plate xvii. f. 5. — Ovata, atra, nitida, capite thorace pedibusque 



pallide rufis, antennarum clava fused. (Long. corp. if lin.) 

 Tr. rufipes. Fabricius.—Steph. Catal. 89. No. 954. 



Short, ovate, glossy black ; with the head, thorax, and legs pale rufous ; an- 

 tennce the same, with the club fuscous: the head much rounded in front ; 

 the thorax very short, convex, punctate, with the lateral edges margined, the 

 posterior one slightly waved, and bearing a delicate transverse impressed line r 

 scutellum black: elytra glossy black, rather obsoletely punctate-striate, the 

 interstices thickly punctulate : legs shining black beneath : the abdomen is 

 sometimes slightly ferruginous. 



Known from all the preceding by its black body; and from the following by its 

 rufous head. 



Also rare : found near Windsor. 



Sp. 6. ruficollis. Plate xvii. f. 6. — Oblonga, nigra, thorace pedibusque rufis, 



antennis castaneo-ferrugineis. (Long. corp. 2^ lin.) 

 Tr. ruficollis. Be Jean ?—Steph. Catal. 89. No. 955. 



Oblong, black, shining: head broad, black: thorax bright rufous, convex, 

 punctured ; the lateral edges alone margined : scutellum and elytra deep 

 black, glossy; the latter distinctly punctate-striate, with the interstices 

 punctured: body beneath black, with its apex piceous; legs red: antennae 

 rusty-chestnut. 



The black head at once distinguishes this species from its congeners. 



Apparently very rare : as yet I have seen but one example, 

 which is in my own cabinet ; it was taken, I believe, near Windsor. 



Genus CLI. — Tetratoma, Herbst. 



Antenna as long as the thorax, the basal joint large, stout, elongate; the second 

 also robust, short, subglobose; the third long, obconic, slender; the four 

 following very short; the remainder forming an elongate quadriarticulate 

 club, the three first joints of which are cup-shaped, the terminal one large, 

 ovate. Palpi elongate, the last joint obconic, with the apex obliquely trun- 

 cate: head small, deflexed: eyes prominent, reniform: thorax transverse, 

 margined: body oblong, convex: legs moderate, or slightly elongate ; tarsi, 

 four anterior 5-jointed. posterior 4-jointed. 



Tetratoma is readily known by having the club of the antennae 

 composed of four joints, a structure that does not elsewhere obtain 

 in this family : the four anterior tarsi are distinctly pentamerous, 

 and the two posterior ones tetramerous : — the known species sub- 

 sist upon funo-i, or beneath the bark of trees. 



