the Atlantic Cossonides. 407 



in medio impresso et ibidem profunde sub-biseriatim punc- 



tato ; elytris plus minus rufescentiovibus, densius pubescen- 



tibus, valde profunde punctato-striatis, interstitiis convexis, 



minute punctulatis ; antennis pedibusque rufescentioribus. 



Mas. — Rostro punctulato, ad antennarum insertionem paulo 



rotundato-ampliato ; prothorace versus latera paulo profundius 



densiusque (quam in disco) punctato. 



Fcem. — Rostro graciliore, tereti, polito, rufo-piceo, ad anten- 

 narum insertionem (i. e. mox ante basin ipsarn) paulo ampliato ; 

 prothorace (prossertim versus latera) multo profundius densiusque 

 (quam in disco) punctato. 

 Long. Corp. lin. 1|- — 2|. 



Habitat ins. Palmam, in ramis emortuis Euphorbia 2^iscatoricer 

 Maio exeunte a. d. 1858 a meipso captus. 



The distinctions between the present species and the last one 

 have already been pointed out — the pubescent elytra of the 

 M. 'piihipenn'is (which have their interstices more convex and 

 evidently punctulated, and their striee broader and deeper), in 

 conjunction with its more closely and roughly punctured pro- 

 thorax (especially, however, of the female sex), being quite suf- 

 ficient at once to characterize it. 



As just stated, the M. pubipennis is apparently peculiar to 

 Palma, where I took eight specimens of it from out of the decayed 

 stems of the Euphorbia f'lscatoria, in the Barranco, above Santa 

 Cruz, at the end of May, 1858. That it is no modification of the 

 M. fasiform'is, which is so abundant and universal throughout the 

 other islands of the Canarian Archipelago, seems evident from the 

 fact that that insect remains constant under the various circum- 

 stances and conditions, and in the innumerable localities, in which 

 it is elsewhere found — being, to all appearance, quite independent 

 both of external agencies and altitude. I conclude, therefore, 

 that the very decided characters of sculpture and clothing which 

 distinguish the M. pubipennis are truly specific ones, and such as 

 cannot be referred to local influences of any kind. 



