246 TOMICID^E. 



The only example of this insect which has yet been brought to 

 light I captured (during the summer of 1850) in the chestnut-woods 

 at S ta Anna, in the north of Madeira proper ; and as the specimen 

 was far from a perfect one, further material is greatly needed in order 

 to ascertain more fully the true characters of the species. 



689. Liparthrum nigrescens. 



Liparthrum bituberculatum, Wott., Cat. Can. C. [nee Ins.MJ] 265 (1864) . 

 nigrescens, Id., Append, huj. op. 44. 



Habitat Canarienses (Ten.), in intermediis et prsesertim editiori- 

 bus rarissimum. 



A Canarian insect which has been observed hitherto only in the 

 intermediate and loftier altitudes of Teneriffe, where moreover it 

 would seem to be scarce. I have taken it at the Agua Garcia and 

 on the Cumbre above the Agua Mansa (in the region of the Reta- 

 mas); and several Teneriffan examples are now before me which 

 were captured by the Messrs. Crotch. In my Canarian Catalogue 

 I referred it to the Madeiran L. bituberculatum ; but in the Appendix 

 to this volume I have stated that additional material has since con- 

 vinced me that it is truly distinct from that species. 



690. Liparthrum bituberculatum. 



Leiparthrum bituberculatum, Wott., Ins. Mad. 297, tab. vi. f. 3 (1854). 

 , Id., Cat. Mad. Col. 97 (1857). 



Habitat Maderenses (Mad.), in sylvaticis intermediis prsesertim cas- 

 tanetis sat vulgare. 



Rather common in the intermediate altitudes of Madeira proper, 

 both in the chestnut-woods and (amongst the laurels) in the strictly 

 sylvan districts. The examples from the latter are perhaps, on the 

 average, more typical than those from the former, being usually a 

 trifle larger and darker. 



691. Liparthrum curtum. 



Leiparthrum curtum, WolL, Ins. Mad. 298 (1854). 



, Id., Cat. Mad. Col 97 (1857). 



Liparthrum , Id., Cat. Can. Col 266 (1864). 



Habitat Maderenses (Mad.), et Canarienses (ins. omnes), in interme- 

 diis et praecipue inferioribus hinc inde vulgare. 



One of the most widely spread of all the wood-boring Coleoptera 

 within these Atlantic islands, where it is nearly universal, occurring 





