CHRYSOMELID.E. 359 



985. Chrysomela gemina. 



Chrvsomela gemina et nitens, Brulle, in Webb et Berth. (Col.) 73, 74 

 (1838). 



, Woll.,Cat. Can. Col 403 (1864). 



Habitat Canarienses (Ten., Oom., Palma), in inferioribus interme- 

 diisque sat vulgaris. 



Likewise a Canarian Chrysomela, and perhaps the commonest of 

 the species hitherto detected even whilst not the most widely 

 spread. I have taken it in Teneriffe and Palma ; and it was found 

 in Gomera by the Messrs. Crotch. It attaches itself to various 

 plants. Thus, in Teneriffe, it was captured abundantly by Mr. Gray 

 and myself upon the Lavandula abrotanoides, near the Puerto Oro- 

 tava ; and I subsequently met with a bush of Bystropogon, above 

 Taganana, literally sparkling with it, a fact of which I have seen 

 the exact counterpart at Madeira, in the case of the C. onychina. 

 And near S to Cruz I have observed it congregating around the roots 

 of the Euphorbias. 



The prothorax of the present Chrysomela is usually quite entire ; 

 but sometimes there are faint indications of a longitudinal depression 

 towards either side, which in rare instances is exaggerated so as to 

 become quite conspicuous. Nevertheless the two forms graduate 

 into each other so completely that I am satisfied there is no indi- 

 cation of a second species amongst the large mass of material which 

 I have examined, from various altitudes and three different islands. 

 Yet I have little doubt that M. Brulle's C. gemina and nitens were 

 founded on an extreme example (or examples) of these particular 

 states. Most of the (few) Gomeran and Palman individuals now 

 before me have the sides of their prothorax more evidently impressed 

 than the ordinary Teneriffan ones ; but in one or two the impression 

 is obsolete, whilst occasional specimens even from Teneriffe have it 

 pretty strongly expressed. 



986. Chrysomela onychina. 



Chrysomela Fragariee, Wall, Ins. Mad. 458, tab. ix. f. 7 (1854). 



, Id., Cat. Mad. Col. 135 (1857). 

 onychina, Id., Ann. Nat. Hist. v. 459 (1860). 



Habitat Maderenses (Mad.), in sylvaticis subeditioribus plantas prae- 

 sertim Bystropogonis punctati, Herit., destruens. 



A most remarkable Chrysomela which appears to be peculiar to 

 the damp sylvan districts of Madeira proper, where, however, it is 



