30 Mr. G. R. Waterhouse on Coleopterous Insects 
is scarcely perceptible ; these notches are tolerably distinet in the 
large specimens ; in other respects they all agree. 
Stomion Helopoides. Stom. fusco-piceus, antennis pedibusque fusces- 
centibus ; corpore ovate, convexo; capite sat crebre punctato; 
elytris seriatim punctatis, interstitiis planis punctis minutis ad- 
spersis.—Long. corp. 3—3H lin.; lat. 14 lin. 
The punctures forming the striz 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; 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 rugze 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 levigatus. Stom. ater nitidus, antennis, palpis, pedibusque 
piceis ; corpore valde convexo, oblongo-oyato ; capite punctulato ; 
thorace punctis minutissimis impressis ; elytris levibus.—Long. 
corp. 4 lin. ; lat. 13 lin. 
Both the antenne 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 striae, 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 Tacenrip# (Tacenrres, Solier). 
Ammophorus galapagoensis. Amm. ater, nitidus, antennis pedibus- 
ie 
