CURCULIONIDjE. 311 



Peculiar to the higher elevations of Madeira proper, where it attains 

 its maximum on the upper limits of the sylvan districts being 

 locally abundant. 



857. Atlantis calcatrix. 



Atlantis calcatrix, Woll, Ins. Mad. 366 (1854). 

 , Id., Cat. Mad. Col 113 (1857). 



Habitat Maderenses (Mad.), in locis similibus ac praecedens sed rarior. 



Likewise peculiar to the sylvan districts of Madeira proper, but 

 evidently much rarer than the A. lamellipes. Indeed of its male sex 

 I have seen hitherto but a single example ; and therefore, since the 

 structure of the tibiae of the male embodies the chief characteristics of 

 the species, it is evident that further material is much needed in order 

 to ascertain positively that the type (now in the British Museum) 

 from which my original diagnosis was drawn out is a normal one of 

 its kind. 



858. Atlantis noctivagans. 



Atlantis noctivagans, Woll, Ins. Mad. 367 (1854). 



lauripotens et australis, Id., ibid. 369, 370 (1854). 



noctivagans, Woll, Cat. Mad. Col 114 (1857). 



Habitat Maderenses (Mad.), folia lauromm in intermediis editiori- 

 busque destruens. 



Like the last two species, attached to the sylvan districts of Ma- 

 deira proper, though (on the average) with a considerably lower 

 range ; for it descends to a comparatively slight elevation, whilst at 

 the same time ascending quite as high as either of them. It appears 

 to subsist on the foliage of the native laurels, a mode of life which 

 we may be pretty sure obtains equally with the lamellipes and cal- 

 catrix. It is an extremely variable insect, presenting many appre- 

 ciable modifications according to the altitude and locality in which 

 it occurs ; and it is just possible indeed (though, I think scarcely 

 probable) that more than a single species may perhaps be included 

 amongst the several slightly different forms which I am now disposed 

 to regard as mere unimportant states of the noctivagans, but two of 

 which I had myself treated originally as distinct. 



859. Atlantis vespertina. 



Laparocerus piceus ?, Schon., Gen. et Spec. Cure. ii. 531 (1834). 

 Atlantis vespertinus, Wott., Ins. Mad. 371, tab. vii. f. 4 (1854). 

 , Id., Cat. Mad. Col 114 (1857). 



Habitat Maderenses (Mad.}, prascipue in locis valde elevatis apertis 

 graminosis sub lapidibus vulgatissima. 



