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ADEPHAQA. 



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slightest importance or constancy can be discovered 



virgule 



compared, no difference of the 



between them ; there can therefore be no utility in retaining mexicana even as a variety 

 of the North-American species. In all, the colour of the sides of the thorax and elytra 

 is a brilliant brassy green, tending sometimes to bluish, with the pale apical 

 broad, dilated, and rounded at its upper extremity, deeply sinuated on its inner edge, 

 and extending broadly to the suture; and the punctuation of the elytra is obsolete a 

 little beyond the middle, leaving the apical part smooth and almost without traces of 

 punctures or granules. 



The var. cyanides is remarkable for the rich violet-blue colour of the sides of the 



thorax and elytra and the much narrowed virgule, which ends in a point generally just 

 before the sutural angle. It appears not to have been met with by M. Salle, and would 



almost merit specific distinction if there did not occur specimens somewhat intermediate 



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in other parts of Mexico. 



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2. Tetracha chevrolati. 



Tetracha Chevrolatii, Chaud. Bull. Mosc. I860, iv. p. 334 \ 



Hab. Mexico \ Merida in Yucatan {Salle). 



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According to a verbal communication from M. Salle, this species is met with only in 



the neighbourhood of Merida, Yucatan. It is a decidedly broader insect than T. caro- 



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Una, with elytra finely and sparsely punctured and granulated towards the apex, and the 

 apical virgule more dilated and rounded at its upper end. The unique example in the 

 Salle collection, a female, is nearly black above, with the sides narrowly brassy green. 



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3. Tetracha sobrina. 



Megacephala sobrina, Dej. Spec. Gen. Col. v. p. 202. 



Yar. Megacephala genieulata, Chevrol. Col. Mex. i. fasc. 2 (1834) 



Var. Tetracha ignea, Bates, P. Z. S. 1878, p. 587. 











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Hab. Costa Eica (Rogers) ; Panama, Obispo (Salvin\ Matachin (Schunke) ; South 

 Ameeica, Colombia, Venezuela. 



Var. genieulata. Mexico, Eio Papaloapan, Tnxtla, Playa Vicente (SalU). 

 Var. ignea. Costa Eica (Rogers) ; Panama, Chiriqui (Mibte). 



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Distinguished from T. Carolina and T. mexicana by the elytra being punctured and 

 perate, with imbricated, though scattered, granules to the apex. The var. genieulata 



and in the width of the apical 



resembles T. Carolina the most in form 



colours 



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The typical sobrina from Colombia and Panama is generally rather 



form, and the posterior black triangular spot of the disk of the elytra ascends furth 



ds the base. The var. ignea is of a much richer red-copper hue 



dorsal 



the 



posterior black spot ascends much further towards the shoulder, and the 



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pical virgule is always much narrower. A variety connecting ignea with sobrina was met 





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