36(3 Mr. T. Vernon Wollasion on 



in Fiierteventura and Lanzarote, where not so much as a fir-tree 

 exists, of course it cannot be expected to occur. 



Genus Hexarthrum. (PI. 18, fig. 2.) 

 Woll., Annals of Nat. Mist. (Ser. 3), v. 4-1-8 (1860). 



The weevil for which I established the present genus in the 

 " Annals of Natural History" for June, 1860, was described by 

 myself in the December number of 1858 as the Rhijncolus capitu- 

 linn ; and it was through not having my original type of the latter 

 to compare with it that I inadvertently characterized it afresh, 

 giving it i\\c name oi '■^ Hexarthrum compressum." Since, there- 

 fore, I overlooked the structural peculiarity of the genus in ray 

 first Paper and re-described the species in my second, it follows 

 that the title under which the insect must stand is Hexarthrum 

 capituhim, the specific name o{ compressum having been superseded 

 by the other. 



In its 6-jointed funiculus (18, 2a), Hexarthrum diflers from all 

 the other genera of the Cossoiiides here enumerated, with the ex- 

 ception of the anomalous OnychoUps, which may possibly be re- 

 garded as a somew'hat doubtful member of the present sub-family ; 

 whilst in its excessively short, broad, triangular rostrum, de- 

 pressed eyes, and its thick, abbreviated antenna?, it is still further 

 characterized. In everything, however, but the number of the 

 joints of its funiculus it is identical with th.e true RhijncoU, — its 

 funiculus-articulations being closely compacted together, and with 

 the second of them not longer than the third ; whilst in the almost 

 unexpanded antepenultimate joint of its feet it is ecpially on the 

 Rhrjiicolus-tyiie ; nevertheless, the character above alluded to will 

 at once distinguish it from that group. 



2. Hexarthrum capituhim, Woll. (Pi. 18, fig 2.) 



Rhijnculus cajntubim, Woll., An. of Nat. Hist. (Ser. 3), ii. 4-10(1 858). 

 Hexarthrmncomjjrcssum, Id., An. of Nat. Hist. (Ser. 3), v. 449 (1 860). 



Habitat Maderam australem, in ligno antiquo a D.D. Park et 

 Bewicke repertum. 



Apparently very rare, or at any riite extremely local, and ob- 

 served hitherto only in the south of Madeira, where a single speci- 

 men of it (described by myself as the " Rhyncolus capitulum") was 

 first detected by Mr. M. Park. Several examples, however, have 

 been found more recently by Mr. Bewicke amongst old wood, in 

 company with the Mesoxemis Bewickianus, in a small shed, or out- 

 house, at the Praia Formosa, near Funchal. 



