36 Mr. G. R. Waterhouse on Coleopterous Insects 



Pedonceces puhescens. Ped. oblongo-ovatus, supra inodice convexus ; 

 piceo-niger, pilis brevissimis, adpressis, fuscis, obsitus ; antennis 

 pedibusque piceis ; capite thoraceque creberrime punctulatis ; 

 elytris punctato-gtriatis, striis non pilosis, interstitiis convexis. — 

 Long. Corp. 3J^ lin. 



The thorax is rather broader than long, has the sides slightly- 

 rounded, the anterior margin rather narrower than the posterior, 

 the hinder angles right angles : the elytra are of an oblong form, 

 scarcely broader in the middle than elsewhere, and very little 

 broader than the thorax j the pale brownish minute hairs have a 

 tendency to a linear arrangement, and are confined to the in- 

 terstices of the striae, which under a strong lens have a coriaceous 

 appearance ; the punctures of the strise are by no means deep, 

 and distinctly separated from each other. 



Mr. Darwin found this species under stones on a hill in Chat- 

 ham Island in the month of September. 



Section XYLOPHAGI, LatreUIe. 

 Genus Apate, Fabricius. 



In Mr. Darwin^s collection are three specimens of a species of 

 this genus which are about equal in size to the Apate capucinus 

 of authors, but differ in being of a black or pitchy-black colour, 

 in having the elytra more convex in the transverse direction, with 

 the punctures rather less deep and more distinctly separated; 

 the hinder portion is obliquely truncated, but descends more sud- 

 denly than in A. capucinus , and each elytron is somewhat humped 

 towards the apex : the upper surface of the thorax is covered 

 with small flattened, polished tubercles which are extremely close 

 together ; the fore-part is covered with angular or acutely pointed 

 tubercles of large size, and is produced into two largeish conical 

 protuberances, the points of which are bent downwards and over- 

 hang the head ; these protuberances are not only covered with 

 tubercles, but have numerous pale hairs * : the mesial portion of 

 the head, between the eyes, is smooth and polished ; the anterior 

 part is rough ; the under parts are clothed with whitish hairs. I 

 have an insect in my own collection from a part of the world which 

 is much better known (Colombia), and which is undoubtedly the 

 same species as the Galapagos insect. From the wide range 

 which it has, it is no doubt known and described. 



The specimens above referred to were found by Mr. Darwin 

 in the branches of a dead Mimosa tree in Chatham Island, and 

 that gentleman states in his notes that the whole length of the 

 bough was perforated by them. 



• These protuberances are less developed than in the Jpate cornuta. 



