526 Mr. T. Vernon Wollaston on the 



the first abdominal segment and greatly abbreviated meta- 

 sternum of Amaurorrhinus and the allied groups. 



29. PENTATEMNUS (Wollaston, Trans. Ent. Soc. Lond. 

 2nd ser. v. 385. 1861). In its obsolete scutellum and eyes 

 (the latter of which are very minute and indistinct, being 

 composed of only about six small lenses), and its dark 

 piceous hue, and the fact of its funiculus being 5 -articulate, 

 Pentatemnus agrees with Ama.urorrhinus ; but it differs 

 from it essentially in most of its other details, as well as in its 

 subfossorial mode of life. Thus, not only is its body (in- 

 stead of being bald) sparingly studded with elongate silken 

 hairs, but its elytra and under-surface are curiously and 

 thickly asperated with obliquely-impinged punctures, its 

 rostrum and antennae (the former of which is more strictly 

 parallel, and the latter are more medially inserted) are 

 much shorter and thicker, its legs are considerably more 

 incrassated, and its third tarsal joint is simple. Its tibial 

 hooks too are very much more developed, the four hinder 

 ones being exceedingly powerful, and rather expanded, and 

 compressed, at their base, causing the tibias to seem as 

 though slightly rounded-outwards at their external angle. 

 The Pentatemni are sand-infesting, and somewhat fossorial, 

 in their habits (as indeed their pilose bodies, obsolete eyes, 

 and strongly-developed legs and tibial hooks would par- 

 tially imply), residing around the roots of shrubby plants 

 which stud the arid tracts of loose, drifting sand in certain 

 islands of the Canarian and Cape- Verde archipelagos, 

 where they often descend to a considerable depth beneath 

 the surface. In such situations I have met with them in 

 Lanzarote, Fuerteventura and Grand Canary of the for- 

 mer, and in Sao Vicente of the latter. 



30. HALORHYNCHUS (nov . gen.). The insect for which 

 the present genus has been proposed is from the collection 

 of Mr. Pascoe, by whom it was received from Freemantle 

 in Western Australia ; and it is perhaps the most impor- 

 tant of all the forms which he has communicated to me, 

 as establishing most completely the manifest relationship 

 which exists (of which, despite the opinion of Lacordaire, 

 I have never myself entertained the slightest doubt) be- 

 tween the Pent artlir ides and that singular department of 

 aberrant, fossorial Cossonids, to receive which I have 

 established the subfamily Onycholipides. Indeed so much 

 has it in common with Onycholips (with which it also 



