CANAEIAN COLEOPTERA. 591 



Hahitat in intermediis editioribusque Teneriffae et Palmoe, usque 

 ad 9000' s. m. ascendens. 



In their narrower and more fragile bodies, more oblong and peduncu- 

 lated heads, smaller prothoraces, and longer limbs the present and two 

 following Simii are quite on a different type from the preceding one 

 — having more in common with the Madeiran Mecognatlius chinurnf, 

 which perhaps may be but an extreme modification of Sunius. The 

 S. megacephalus is, on the average, rather the largest of the three, 

 and is generally of an obscure rufo-ferruginous hue — the elytra being 

 immaculate (or sometimes very faintly clouded anteriorly); and its 

 head is always greatly developed. I have observed it hitherto only 

 in Teneriffe and Palma (in the former of which it was found also by 

 Dr. Crotch), where it occurs at intermediate and lofty elevations — 

 ascending to at least 9000 feet above the sea. My Teneriifan speci- 

 mens are from the laurel-woods above Taganana, Souzal, the Agua 

 Mansa, and the Cumbre above it, and from the opposite Cumbre ad- 

 joining the Canadas. 



906. Sunius dimidiatus, n. sp. 



S. praecedenti similis, sed plerumque vix minor angustior, elytris in 

 parte basali Isete et abrupte nigris. — Long. corp. lin. 2-vix 2|. 



Hahitat in Canaria, Teneriffa, Gomera et Hierro, sub lapidibus in 

 inferioribus intermediisque praecipue degens. 



It is barely possible that this Sunius may be but a well-marked 

 variety, or state, of the megacej)lialus ; but I think that it is truly dis- 

 tinct, though immature examples of both (in which the colour is not 

 fully developed) are not always readily separable. On the average, 

 the S. dimidiatus is just perceptibly smaller and narrower than its 

 aUy ; and its elytra have their basal half conspicuously and abruptly 

 black. It appears to have a rather lower range than the mega- 

 cephalus ; for, although it occurs equally at intermediate altitudes, it 

 descends to almost the sea-level. I have taken it in the region of 

 El Monte in Grand Canary, as well as in Teneriffe, Gomera, and 

 Hierro. My Teneriffan examples are from S*" Cruz and the moun- 

 tains above it, the vicinity of the Puerto Orotava, the Agua Mansa, 

 and from the hills between Laguna and Tacaronte. 



907. Sunius pallidulus, n. sp. 



S. prsecedentibus duobus affinis, sed paulo minor, omnino pallidior 

 (elytris pallidis immaculatis, abdominis segmento quinto solum 

 nigro), sensim minus opacus ac minus rugose sculp turatus ; capite 



