484 PHYTOPHAGA. 



underside and femora testaceous j the knees, the apices of the tibiae, and the tarsi dark fuscous or 

 pieeous. 



Eab. Mexico, Puebla, Orizaba, Cuernavaca (SalU), Tehuacan (Edge). 



Many specimens were received of this species, which, I believe, is not uncommon in 

 collections; it is apparently undescribed. JV. auriquadrum agrees in structural 

 characters with K bimaculatus, and may be recognized by the broad testaceous margins 

 of the elytra surrounding the bright metallic cupreous or greenish disc on all sides. 

 The male has the last abdominal segment concave-emarginate at the middle ; in the 

 female the same part is simple but thickened at the sides. 



3. Nestinus flavo-marginatus. 



Nestinus Jlavomarginatus, Jac. P. Z. S. 1879, p. 789 . 



Hah. Mexico 1 {coll. Jacoby). 



Closely allied to N. auriquadrum, but distinguished by the narrow testaceous elytral 

 margin, and by the reddish-purple colour of the disc of the elytra, which is not inter- 

 rupted by the testaceous basal margin as in the allied species, but extends quite to the 

 base. The scutellum in N. flavo-marginatus is nearly black, and a narrow pieeous 

 margin limits the metallic colour of the elytra at the shoulders; the elytra are also 

 rather more strongly rugose, the rugosities being more closely placed than in N. auri- 

 quadrum. There are three specimens of N. flavo-marginatus contained in my collection ; 

 they are labelled Mexico, without precise locality. 



4. Nestinus viridis. 



Monoxia viridis, Jac. P. Z. S. 1879, p. 787 1 *. 



Eab. Guatemala, Zapote (Champion). 



I find, now that I have been able, through the kindness of Dr. Horn, to examine 

 typical species of the genus Monoxia, that the insect described by me as belonging to 

 that genus differs totally from it and seems to me to be more properly placed in 

 Nestinus. The dark green colour of the upper surface will at once assist in its recogni- 

 tion ; the fulvous antennae and similarly coloured and shining scutellum are further 

 characteristic of N. viridis. 



** Tibiae scarcely or not at all sulcate ; claws sometimes simple (Monoxia). 



TRIRRHABDA. 



Trirhabda, Leconte, Proc. Acad. Phil. 1865, p. 219. 

 Trirrhabda, Gemm. & Har. Cat. xii. p. 3575. 



This genus was separated by Leconte from Galeruca, or rather Galerucella, on 

 account of the narrow elytral epipleurse, which do not extend to the tip, and the 



* The generic name of this insect is erroneously given as Monotia. 



