COBAIA.— 1STESTINUS. 483 



black ; thorax more than twice as broad as long, the sides narrowed towards the base, fulvous, with a 

 more or less metallic green spot at each side and at the middle, covered with long yellowish hairs, the 

 surface obsoletely depressed at the sides, very sparingly and obsoletely punctured ; scutellum broadly 

 truncate at the apex, closely covered with thick pubescence; elytra nearly parallel, their epipleurse 

 distinct at the base, but very obsolete and narrow below the middle, the surface closely rugose-punctate 

 throughout and of a purplish or metallic green colour ; tibise not channelled but covered with close 

 pubescence at the sides ; the sides of the breast, the femora, and the tarsi more or less stained with metallic 

 green ; the first joint of the posterior tarsi as long as the two following joints together ; claws bifid. 



Hab. Mexico, Orizaba, Oaxaca, Etla (SalU). 



The antenna? in this insect are much shorter and more robust than in the more 

 typical species, although the proportionate length of the joints is the same ; as the 

 shape of the thorax, general form, and the finely rugose elytra correspond exactly with 

 Coraia, I have thought it best not to separate the present species from that genus. 



NESTINUS. 

 Nestinus, Clark, Ann. & Mag. Nat. Hist. 3rd ser. xvi. p. 324 (1865). 



There seems to me but little difference between this genus and Trirrhabda, Leconte, 

 except in the larger size of Nestinus ; both genera agree in the comparative length of 

 the joints of the antenna?, in the three-spotted thorax, and other particulars. The three 

 species described by Clark (who says that they are all from Mexico, although he only 

 describes one from that country) seem to have been lost, as they are not contained in 

 the British Museum ; there is, however, one species before me which agrees perfectly 

 with that author's description. 



1. Nestinus bimaculatus. (Tab. xxvii. fig. 15.) 



Nestinus bimaculatus, Clark, Ann. & Mag. Nat. Hist. 3rd ser. xvi. p. 325 \ 



Hab. Mexico (coll. Jacoby), Cuernavaca, Puebla (Salle) ; Guatemala 1 . 



This large-sized species may be at once known by the flavo-testaceous colour of the 

 elytra, each of which has a small round metallic blue spot placed near the apex. In one 

 of my specimens the antennae and the tarsi are nearly black ; there is also generally a 

 small black spot placed at the sides of the breast ; I also refer a smaller-sized specimen 

 from Puebla, which does not differ from the others, except in the want of the blue 

 elytral spot, to the present species. 



2. Nestinus auriquadrum. (Tab. XXVII. fig. 14.) 



Testaceous; antennas and tarsi fuscous ; head with one, the thorax with three black spots; elytra rugose- 

 punctate, reddish or greenish-cupreous, their margins broadly testaceous. 



Length 4|-5| lines. 



Head rather indistinctly punctured ; antennae nearly as long as the body, the fourth joint longer than the 

 third ; thorax with the sides rounded before the middle, the surface transversely and shallowly depressed, 

 rather coarsely and irregularly punctured, with three small black spots placed transversely ; scutellum 

 broadly ovate, testaceous ; elytra strongly rugosely punctured, the disc marked with a broad and sub- 

 quadrate metallic cupreous patch, the sides of which are somewhat constricted towards the middle ; the 



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