CANARIAN COLEOPTERA. 255 



very deeply punctate-striated, with the excavated portion at their 



apex bounded on either side by a large obtuse tooth, two acuter ones 



behind it, and two or three still smaller, obscurer, and more or less 



subconfluent ones towards the apex ; in addition to which there is a 



minute and sharp one in front, on each side of the suture. In some 



examples, however, which are perhaps the females, these teeth are 



altogether smaller and more confused. It seems to be confined to 



the rotten wood of the Pinus canariensis, beneath the loose bark of 



which it is locally abundant, in the intermediate elevations of Tene- 



riffe and Palma. In such situations I have taken it at the Agua Mansa 



of the former, and in the Barranco above S'* Cruz of the latter. 



I am far from certain, however, that the present Tomicus is in 



reality distinct from the Madeii'an T. erosxis ; from which it appears 



mainlj to differ in its larger size and relatively broader outline ; in 



its pro thorax being rather more deeply punctured behind and just 



perceptibly narrower in front ; in its elytra being xisually more pi- 



ceous or nifescent, and with the large punctures of their striae a trifie 



more distant inter se ; and in its tibiae being perhaps a little less spi- 



nulose externally. 



412. Tomicus Saxesenii. 



Bostrichus Saxesenii, Ratz., die Forst-Insect. i. 167 (1837). 

 Tomicus Dohmii, Wall., Ins. Mad. 290 (1854). 

 , Id., Cat. Mad. Col. 96 (1857). 



Habitat Teneriffam et Pahnam, rarissimus. 



The T. Saxesenii, which in Madeira seems to be confined principally 

 to the laurel-woods of a high elevation, where it is often extremely 

 abundant, would appear (so far as I have observed hitherto) to be 

 very rare in these islands ; and it is somewhat remarkable that the 

 few examples of it which I have met with were beneath the bark of 

 the Pinus canariensis. Under such circumstances I have taken it, 

 very sparingly, in Teneriffe, and in the Barranco above S*^ Cruz in 

 Palma. 



Genus 173. XYLOTERUS. 

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



Although I have but a single example (and that, I beheve, a female 

 one) to judge from, I nevertheless refer the insect described below to 

 Xyloterus, since in the exact proportions of its quadriarticulate funi- 

 culus, as well as in the shape of its compressed and extremely solid 

 club, it agrees precisely vpith (at all events the corresponding sex of) 

 that genus. Its feet, too, have their antepenultimate joint nearly 

 simple, whilst its tibiae (which are a good deal widened) have their 



