238 



TOMICIDJE. 



it. And although it has so many characters in common with the T. 

 Saxeseni that at first sight it might almost be regarded as a pale 

 variety of that species, I nevertheless am quite satisfied that it is 

 totally distinct ; and I believe moreover that it is not even a Euro- 

 pean insect, but one which has been established accidently in the 

 stores of Funchal (perhaps from South America) through the medium 

 of commerce. Indeed if a Brazilian type which is now in my pos- 

 session can be relied upon, and which was given me (with a very old 

 label appended to it) by the late Mr. Melly of Liverpool, there can 

 be no doubt that the Madeiran Tomicus is the BostncJius ferrugineus 

 of Eabricius ; nevertheless as I can scarcely act on this conclusion 

 without further evidence (the Fabrician diagnosis being, of course, 

 utterly worthless), I will not suppress the name of perforans until 

 it has been settled positively that Mr. Melly' s specimen is rightly 

 identified*. 



The T. perforans is not only much paler, but also a trifle larger, 

 broader and less pubescent than the Saxeseni ; its prothorax is longer 

 and more developed, and very much more polished behind where 

 there is no trace of the alutaceous sculpture which is always so con- 

 spicuous under a high magnifying-power in that insect, and where 

 likewise the punctules are still more remote ; and its elytra have the 

 asperities towards their apex (which is itself less bent downwards at 

 the extreme point) larger and fewer in number, and the punctures 

 of their interstices more distant. 



Genus 212. XYLOTERUS. 

 Erichson, in Wiegm. Archiv, ii. 60 (1836). 



670. Xyloterus longicollis. 



Xyloterus longicollis, Wott. t Cat. Can. Col. 256 (1864). 

 Habitat Canarienses (Fuert.}, rarissimus ; semel tantum captus. 



The only specimen of this insect which I have seen was capturec 

 by myself in Fuerteventura, of the Canarian Group, beneath the 

 refuse of a camels' stable in the Eio Palmas. It is probable however 

 that its presence in that particular situation was merely accidental. 



Genus 213. CRYPHALUS. 



Erichson, in Weigm. Archiv, ii. 61 (1836). 





* If this should prove to be the case (as I cannot but think extremely pro- 

 bable), may not Fabricius's " Varietas nigra, vix distincta " refer to the European 

 T. Saxesenit 



