CANARIAN COLEOPTERA. 403 



Gray, another by myself, and the third (more recently) by Dr. Crotch. 

 It may readily be known from the C. ohsoleta by its much more 

 brilliant, unaliitaceous, and bright-brassy surface ; by its larger and 

 squarer prothorax being perhaps a trifle more evidently punctulated, 

 and very much more deeply impressed on either side (the impres- 

 sion, moreover, running from the extreme base to almost the anterior 

 margin); by its elytral punctures being smaller and rather more 

 numerous ; and by its wings (although minute and narrow) being 

 somewhat less narrowed than is there the case, and Hkewise infus- 

 eated more decidedly throughout their entire apical portion (whereas 

 the wings of the C. ohsoleta are more often maculated with a cloudy 

 spot in the middle only). 



616. Chrysomela gemina. 



C.ovalis, nitidissima, vel oeneo-cuprea, vel viridi-euprea, vel senea, vel 

 viridi-senea ; capite parce punctulato ; prothorace fere impunctato 

 (oculo fortissimo armato punctulis subtilissimis plus minus perspi- 

 cuis adsperso), utrinque (punctis perpaucis notato) vel integro vel 

 jiostice versus latera obsoletissime (plus minus perspicue) impresso ; 

 elytris parce subseriatim punctatis, seriebus alternis inter se paulo 

 approximatis ; antennis pcdibusque picescentioribus. 



Variat in ins. Palma elytrorum punctis paulo majoribus. — Long.corp. 

 Hn. 3-5. 



Chrysomela gemina et nitens, BruUe, in Webh et Berth. {Col.') 73, 74 

 (1838). 



Habitat in Teneriffa et Palma, hinc inde vulgaris. 



Judging from the diagnoses, and taking into account the very 

 scanty material of Messrs. Webb and Berthelot which M. Brulle 

 appears in nearly all instances to have described from, I have little 

 doubt that the C. gemina and nitens of the latter were founded on 

 extreme individuals of this variable Chrysomela ; for although he 

 speaks of the former of them as having the thorax entire, and the 

 other as furnished with " un demibourrelet sur les cotes du corselet," 

 it seems to me, after the inspection of 213 examples, collected in 

 many locahties widely separated from each other, that the majority 

 of them might be said to have the prothorax *' entire," though there 

 is a tendency in a certain number to possess a slight longitudinal de- 

 pression on either side behind, which in rare instances becomes rather 

 decidedly expressed. And I tliink it is more than probable, there- 

 fore, that M. Brulle may have di-awn up his diagnoses from a large 

 •arid small individual, in which these differences chanced to be more 

 than usually appreciable, and in which also the colour was respectively 

 ceneous and coppery. 



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