South American Eumolpidfe. 471 



From several similarly coloured species (M. oJUorosjnloia, 

 Marsh., M. godmani, Jac, M. hirsuta, Jac), the present 

 insect differs in the very strongly rugose, almost verrucosa, 

 lateral portion of the elytra, and the shape and position of 

 the elytral green spots ; the first of these or the one 

 placed on the shoulders is not round but elongate and of 

 an oblique sutural direction, and the posterior spot is 

 placed at a greater distance from the apex than is gener- 

 ally the case in the allied species. I received three 

 specimens from the late Mr. Flolir, too late for the publi- 

 cation of the species in the Biologia Centr, Americana. 



Metaxyonychafasciata, Lefev, (Rev. et Mag. de Zool. 1875). 



This species was described by Baly again as 31. pulchcUa 

 (Trans. Ent, Soc. Lond. 1881) ; neither Lefevre nor Baly 

 mentions which sex he was describing. Lefevre had 

 evidently female specimens before him, as he describes the 

 elytra as costate, but does not mention any impressions of 

 the thorax, on account of which Baly looked upon his M. 

 'pulchella as distinct, but this depression is not always 

 equally well marked, or perhaps Lefevre forgot to mention 

 it. I have now both sexes before me, the male from 

 Venezuela ; in this sex, the cost* of the elytra are only 

 slightly visible, and the fulvous band which divides the 

 metallic green patches is slightly widened at the suture. 

 Other differences of importance, making allowance for those 

 of sex, I cannot find. 



Metaxyonycha hatesi, Baly. 



M. formosa, Lef., agrees in every detail with this 

 species. Neither author mentions the sex, nor does 

 Lefevre compare his sj^ecies with that of Baly, which was 

 described two years before his own ; he simply says that it 

 differs from his M. fasciata in the absence of the elytral 

 costse, besides the colour of the tibiae and tarsi, but it does 

 not seem to have struck him that elytral costse are gener- 

 ally peculiar to the female sex in this genus, but not 

 always, which makes it all the more necessary to state 

 which sex the author is describing. 



Ararynlha thoraeica, sp. n. 

 Rufous, the antenna;, tibiio and tarsi black, thorax with purplish 

 gloss, remotely punctured, elytra metallic green or blue, strongly 

 geminate-punctate-striate, the interstices longitudinally costate. 



