486 PHYTOPHAGA. 



the preceding or following ones ; thorax twice as broad as long, testaceous, with three large metallic 

 green spots placed transversely, the surface rather deeply depressed at the sides, coarsely but not very 

 closely punctured; scutellum blackish; elytra finely transversely wrinkled and rugose throughout, 

 the interstices very finely punctured, greenish or purplish-aeneous, the lateral margins narrowly flavous ; 

 underside and legs testaceous, the tarsi slightly darker. 



Hab. Mexico, Yolotepec {Salle). 



Distinguished from T. variabilis by the wrinkled glabrous elytra, and the coarsely 

 punctured thorax. 



3. Trirrhabda trifasciata. 



Testaceous, opaque, finely pubescent ; antennae, three thoracic spots, and the tibiae and tarsi, fuscous ; elytra 

 closely pubescent, very finely punctured, the suture and a sublateral narrow band fuscous. 



Length 3 lines. 



Head nearly impunctate, with a fine central groove ; antennae nearly as long as the body, the third joint twice 

 as long as the second, the fourth joint nearly double the length of the third, the three basal ones testaceous 

 at their apices, the rest fuscous or nearly black ; thorax transverse, rather strongly constricted at the 

 base, the disc with two distinct depressions at the sides, finely and irregularly punctured, a spot at the 

 middle and one at each side, black ; scutellum fuscous ; elytra closely covered with fine grey pubescence 

 which nearly hides the punctuation, a sutural narrow and posteriorly attenuated stripe, as well as an 

 equally narrow stripe (not quite extending to the suture at the apex) near to and parallel with the lateral 

 margin, fuscous ; underside and femora testaceous ; tibiae and tarsi nearly black. 



Hob. Mexico, Cordova (Salle). A single specimen. 



The narrow sutural and lateral elytral stripes, the latter being placed close to the 

 lateral margin, separate T. trifasciata from T. canadensis, Kirby, and allied forms. 



4. Trirrhabda obscuro-vittata. (Tab. XXVII. fig. 22.) 



Obscure testaceous ; antennae, tibiae, and tarsi fuscous ; head with one, the thorax with three black spots, very 

 finely rugose ; elytra opaque, pubescent, greenish or brownish-fuscous, each with three raised testaceous 

 narrow stripes from the base to the apex. 



Length 4 lines. 



Head testaceous, with a central longitudinal groove, the vertex occupied by a large fuscous spot ; mandibles 

 and part of the labrum piceous ; antennae black or fuscous, the basal joint and the base of the following 

 one testaceous, the fourth joint one half longer than the third ; thorax three times as broad as long, 

 distinctly narrowed at the middle, the sides strongly rounded and forming a distinct angle before the 

 middle, the surface very finely rugose and with the usual three blackish marks ; scutellum testaceous, 

 broad, its apex truncate ; elytra nearly parallel, covered with short pubescence, finely coriaceous ; the 

 first joint of the posterior tarsi in the male as long as the three following joints together, rather shorter in 

 the female. 



Hab. Beitish Hondueas, R. Hondo (Blancaneaux) ; Guatemala, Cerro Zunil 

 (Champion); Nicaeagua, Chontales (Belt); Panama, Bugaba (Champion). 



The thorax in this species is distinctly narrowed at the middle. If the testaceous 

 colour of the elytra (which are scarcely visibly punctured) is looked upon as the ground- 

 colour, each elytron has four nearly equally wide longitudinal bands of an obscure 

 fuscous colour, sometimes with a greenish tint ; the fuscous bands become entirely 

 obliterated near the apex ; of the narrow testaceous stripes, the one near the lateral 

 margin is generally raised in the shape of a more or less distinct costa. 



