198 Mr. T. Vernon Wollaston on the 



C. Bonvouloirii by its rather more shining and less alutaceous 

 surface, by its more piceous and anteriorly-expanded prothorax 

 (which has the two intermediate ridges smaller, causing the disk 

 to be cornparatively flattened), and by its more oval and less 

 acuminated elytra, — which are widest about the middle, more 

 densely studded with long erect hairs than is the case in its ally, 

 have their basal costae very much less developed, their striae 

 (which however are somewhat variable) less apparent, and their 

 hinder fascia (the anterior one being usually quite obsolete) 

 straighter and much more obscure. The '' var. /3" may perhaps 

 be specifically distinct ; indeed in its rather more developed 

 costse, and its slightly more elliptic, subalutaceous and less pilose 

 elytra, it is intermediate between the present insect and the last 

 one ; nevertheless the form of its anteriorly-widened prothorax 

 must I think tend to associate it with the C. dilatkoUls rather than 

 with the Bonvouloirii. The typical state is not very uncommon, 

 beneath stones, in the rocky ground immediately outside the 

 Puerto of Orotava, adjoining the cemetery; as also, though more 

 sparingly, on the ascent of the mountains around Santa Cruz : 

 but the " var. /3 " (if indeed it be not specifically distinct) seems 

 to inhabit a somewhat higher region, — Souzal, Las Mercedes and 

 Taganana being the spots in which I have hitherto observed it. 



3. Casapus alticcla, n. sp. (PI. VIII. fig. 2.) 

 C. niger ; prothorace picescenti, antice plus minus distincte 

 dilatato, costis discalibus obsoletis (disco subaequali), late- 

 ralibus sat distinctis, ad basin parce fulvo-squamoso ; elytris 

 ovalibus, basi paulo truncatis, profunde striato-punctatis, 

 pilis elongatis densis ubique et setis densioribus ad basin 

 (praesertim ad humeros) obsitis, costulis 4 basalibus sub- 

 obsoletis, fasciis duabus fractis [sc. antemedia et postmedia, 

 plerumque subaequaliter distinctis] albido-ornatis ; antennis 

 pedibusque subelongatis, sat robustis, rufo-ferrugineis, squa- 

 mosis. 

 Long. corp. lin. vix !| — 2. 



Habitat sub lapidibus in editioribus Teneriffse, usque ad 8000 

 s. m. ascendens. 



Like the C. Bonvouloirii, the present Casapus is confined to lofty 

 elevations, and is apparently peculiar to Teneriffe, — ascending 

 indeed to a still higher altitude than that species, for I have taken 

 it at upwards of 8,000 feet above the sea. It is nevertheless 

 closely allied to the C. dilalicolUs of the lower regions, with which 

 m its shape and clothing it is almost coincident ; and I am far 

 from certain that it is in reality more than a phasis of that insect. 



