80 Mr. G. R. Waterhouse on Coleopterous Insects 



is scarcely perceptible ; these notches are tolerably distinct in the 

 large specimens ; in other respects they all agree. 



Stomion Helopoides. Stom. fusco-piceus, antennis pedibusque fusces- 



centibus ; corpore ovato, convexo ; capita sat crebre punctate ; 



elytris seriatim punctatig, interstitiis planis punctis minutis ad- 



spersis. — Long. corp. 3 — 3^ lin. ; lat. Ij lin. 



The punctures forming the striae on the elytra of this species 

 are less distinct^ and those on the interstices are more distinct 

 than in the St. galapagoensis ; the interstices moreover are flat, 

 or sometimes^ the one or two nearest the suture are very slightly 

 convex. The thorax is transverse, evenly rounded at the sides, 

 and of equal width before and behind, or very nearly so j the an- 

 gles are slightly obtuse ; the upper surface is pretty thickly co- 

 vered with smallish punctures ; the under surface is smooth at the 

 sides, but presents small rugae and a few punctures near the base 

 of the legs. The punctures which are arranged in rows on the 

 elytra are by no means strong, and are distinctly separated ; and 

 the smaller punctures on the interstices are moderately numerous. 

 The abdomen is finely punctured. 



Two specimens in Mr. Darwin's collection agree with this de- 

 scription; there is a third individual which agrees in other respects, 

 but is rather larger and almost of a black colour, and has the legs 

 of a pitchy hue. 



Stomion Icevigatus. Stom. ater nitidus, antennis, palpis, pedibusque 



piceis ; corpore valde convexo, oblongo-ovato ; capita punctulato ; 



thorace punctis minutissimis impressis ; elytris Isevibus. — Long. 



Corp. 4 lin. ; lat. Ijlin. 



Both the antennae and legs are rather shorter and a trifle thicker 

 in proportion in this species than in others of the genus here 

 described ; the form of the body is more oblong, and the thorax 

 is not sensibly broader behind than in front ; the head moreover 

 is larger. The insect is very glossy, and to the naked eye its 

 thorax and elytra appear to be perfectly smooth. The head is 

 distinctly and thickly punctured : the thorax is but little broader 

 than long, has the sides nearly parallel and very indistinctly 

 rounded; its upper surface is very convex and rather thickly 

 punctured, but the punctures are extremely minute : the elytra 

 are very convex and but little broader than the thorax ; sometimes 

 they exhibit excessively minute punctures arranged in strise, and 

 there are a few punctures in the interstices ; it requires however a 

 tolerably powerful lens to perceive these punctures : the thoracic 

 segments are punctured beneath, and so is the mentum ; the ab- 

 domen is smooth, or most indistinctly punctured. 



Family Tageniid^e (Tagenites, Solier). 

 Ammophorus galapagoensis. Amm. ater, nitidus, antennis pedibus- 



