Broun. — Notes on Coleoptera jrom the Chatham Islands. 149 



simple at the extremity, the base is broader than that of the thorax, tJiey 

 are slightly but widely giniiate before the middle femora ; the broad grooves 

 are opaque, with irregular punctures, so that the finely punctured interstices, 

 which are slightly shining, appear somewhat costiform ; the broad marginal 

 channels are indistinctly sculptured, there is no perceptible granulation ; 

 near each side, at the base, there is a broad impression, which, however, 

 may not be a constant character. 



The broadly expanded sides distinguish this species. 



Length, 5|- lines ; breadth, 2| lines. 



Pitt's Island. 



My specimen was presented to me over twenty years ago by the late 

 F. P. Pascoe, who, no doubt, had described it under the name I have attached 

 to it ; its description, however, I have not seen. 



Descriptions of Coleoptera from the Chatham Islands, by Dr. D. 



Sharp, copied from the " Entomologists' Magazine " for April, 



1903. 



Group Heleid^e. 

 Cilibe subcostata. 



Nigra vel picea, minus depressa, fortiter sculpturata, opaca, elytris 

 evidenter subsulcatis. 



Long., 1.3J mm. 



This is distinguished from all the other species by the peculiar sculpture 

 of the elytra, which, however, is only an exaggeration of what we find in 

 some other forms. The front angles of the thorax are much produced, 

 and the sides are much explanate, their margins a little sinuate ; the hind 

 angles much produced backwards and markedly acute ; the punctuation 

 at the sides is very dense, on the disc it is scanty, but the surface is not in 

 the least shining. The elytra are rather short, and have a vague costation, 

 the very slightly elevated ribs are separated by coarse punctures ; this 

 sculpture sets off and makes evident the ribs. 



Professor Schauinsland found a small series of this species. It is nearest 

 allied to C. pascoet, Bates, of Pitt's Island, a species which was also met 

 with there by the German traveller. C. pascoei is, however, rather more 

 elongate and less convex in form, and with the sculpture of the elytra 

 different, there being merely traces of the longitudinal ribs. Professor 

 Schauinsland's specimens are intensely black, being considerably darker in 

 colour than Mr. Bates's type. I have dissected the sexes of C. subcostata, 

 and do not find any external marks to distinguish them. 



Group Cryptorhynchid.t:. 

 Aldonus chathamensis. 



Ferrugineus vel piceus, setis erectis numerosis superne vestitus, hand 

 squamosus, rude sculpturatus ; subtus setosus, inter setas squamis perpaucis 

 munitus. 



Long., 7|-13 mm. 



Distinguished from A. hylobioides and all the other species ascribed to 

 the genus by the absence of scales from the surface. The rostrum is longer 

 than it is in A. hylobioides ; it bears fine erect hairs, but in consequence 

 of the absence of scales its coarse sculpture can be distinctly seen. Thorax 

 very rough, with tubercular sculpture, with fine, short, erect hairs, and with 



