from the Galapagos Islands. 29 



however, shows that the present insects are in affinity remote 

 from the Helops group, and indeed belong to the TentyriicUe. 



In having a distinct scutellum, the eyes transverse and not 

 covered by the lateral ridge of the head, the mentum truncated, 

 and the tibise simple, the genus Stomion approaches to Anatolica, 

 and yet the general form of the species of Stomion is very differ- 

 ent to that of the species of Anatolica ; the more slender antennae 

 with the terminal joints incrassated, and the absence of emargi- 

 nation to the mentum, would alone, however, serve to distinguish 

 Stomion from Anatolica. Perhaps Eschscholtz's genus Eurymeto- 

 pon is more nearly allied to our present genus ; the species of 

 Eurymetopon are represented by Eschscholtz, however, as having 

 the head broad, the thorax nearly as broad as the elytra, the eye 

 small, and the tibise very short, all of which characters will not well 

 apply to Stomion. The approach, on the other hand, is evinced, 

 as it would appear, in the structure of the antennae and the 

 truncated form of the clypeus. 



Stomion galapagoensis. Stom. ater, obscurus, antennis palpisque 

 piceis, pedibus piceo-nigris ; corpore ovate, convexo ; capita tho- 

 raceque crebre punctulatis ; elytris seriatim punctatis, interstitiis 

 convexis, punctis minutissimis adspersis. — Long. corp. 5J lin. ; 

 lat. 2f lin. 



The body is very convex, of a broad ovate form, and dull black 

 colour ; the head is flat above or slightly concave in the middle 

 and thickly punctured ; the thorax is broader than long, and nar- 

 rower before than behind, slightly emarginated in front, where 

 the angles are somewhat acute ; evenly and gently rounded at the 

 sides, and indistinctly sinuated behind ; the posterior angles are 

 right angles ; the upper surface is distinctly convex, and very 

 thickly and rather finely punctured; an impressed line runs parallel 

 with, and close to the posterior and lateral margins, and is also 

 continued on the anterior margin, but is interrupted in the mid- 

 dle. The scutellum is small and transverse ; the elytra are very 

 convex ; at the base they are scarcely broader than the thorax, 

 but in the middle they are considerably wider, and at the apex 

 they are pointed ; they have series of punctures forming the or- 

 dinary striae, but these punctures are by no means strong ; the 

 interstices are convex and covered with very minute scattered 

 punctures. The mentum is distinctly punctured, and the thoracic 

 segments are strongly punctured in the middle beneath : the ab- 

 dominal segments have fine scattered punctures. 



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

 scription ; there are others of a much smaller size, being about 

 four lines in length, and in which the notch on each side of the 

 fore-part of the head, marking the outer boundaiy of the clypeus, 



