from the Galapagos Islands. 27 



again into an obtuse angle. Clypeus broader tban long, con- 

 tracted and slightly recurved at the apex, which is indistinctly 

 emarginated. Thorax convex, with the sides rather boldly rounded; 

 the posterior margin also rounded, but forming a segment of a 

 larger circle ; the fore-part emarginated ; anterior angles slightly 

 acute, posterior obtusely rounded ; the sui'face above with distinct 

 punctures, but these remote from each other — most numerous on 

 the fore-part ; there is moreover a fovea on each side about mid- 

 way between the anterior and posterior angles, and a little re- 

 moved from the lateral margins. Scutellum triangular, slightly 

 rounded at the tip. Elytra convex, much broader than the thorax, 

 and broadest at the posterior third ; the humeral angles obtusely 

 rounded, the hinder part very obtusely rounded ; they have a few 

 exceedingly minute scattered punctures, some indistinct little 

 rugse, and one or two longitudinal larger impressions. The 

 sutural stria is composed of a subinterrupted series of distinct 

 punctures. The body beneath is well-clothed with yellow hairs, 

 and so are the legs : the terminal segment of the abdomen, like 

 the elytra, has exceedingly minute scattered punctures; it is 

 convex, rounded at the extremity, and its transverse diameter is 

 about three times greater than the antero-posterior ; the penul- 

 timate segment above is tolerably well-clothed with yellow hairs 

 (the last has but few hairs), presents a distinct longitudinal fur- 

 row in the middle, and this furrow is bounded on either side by 

 a slightly elevated ridge. The legs are short and stout, and the 

 anterior tibise have three tooth-like processes on the outer side. 

 The insect is very glossy and of a bright chestnut-brown colour. 



Section HETEROMERA. 



Family Tentyriid^. 



Genus Stomion^ (nov. gen.). 



Clypeus truncated in front, its lateral boundaries indicated by 



two slightly impressed longitudinal grooves. 

 Labrum prominent, transverse, and slightly emarginated in front. 

 Mandibles projecting beyond the clypeus when closed, covered at 



the apex by the labrum, but with the sides exposed when the 



head is viewed from above ; they are bidentate at the apex. 

 Mentum broad and transverse and very nearly semicircular, the 



rounded part being in front. 

 Maxillary palpi moderate ; the terminal joint triangular, at least 



as long as broad : labial palpi short. 



* ^rofitov, a little mouth ; having allusion to a peculiar conformation of 

 the mouth of this and some allied genera, viz. that of having the mouth closed 

 beneath by a large mentum, by the sides of which there does not exist the 

 usual emarginations for the maxillae, which are therefore hidden. 



