498 PHYTOPHAGA. 



In the rather long series obtained of this insect the only variation at all noticeable is 

 the almost entirely dark fuscous colour of the elytra in some specimens. If M. semi- 

 fasciata is taken as an example, it will be seen that the simple or appendiculate claws 

 are attributable to sexual differences, and that this applies probably to those species 

 separated by Leconte into two sections according to this structure. This insect was 

 only met with on the Pacific coast at Champerico. 



SCHEMATIZA. 



Schematiza (Chevr.), Blanchard, Hist, des Ins. ii. p. 190 (1845) ; Clark, Trans. Ent. Soc. Lond. 

 1864, p. 259. 



In most instances, a species of the genus Schematiza is easily recognized by the 

 flattened and dilated intermediate joints of the antennae, and the general shape of the 

 body, which strongly resembles that of some species of " Lycidae." Certain species, 

 however, are now known in which the peculiar structure of the antennae, as well as 

 the general shape, is so modified as to create great doubt as to their proper position ; 

 these modified forms might equally well be placed in Galerucella, having some of the 

 characters of that genus and of Schematiza. Amongst the Central-American species 

 here described for the first time, there are some in which the shape of the thorax 

 is partly or entirely typical of Schematiza, while the antennae are formed as in 

 Galerucella. I prefer placing these doubtful forms in genera with which they seem to 

 have the greatest affinity, rather than make new and unsatisfactory ones for their 

 reception. 



1. Schematiza collaris. (Tab. XXVIII. fig. 15.) 



Elongate, black, scarcely pubescent ; clypeus testaceous ; thorax light fulvous, with a central black band, finely 

 pubescent ; elytra black, finely rugose. 



Length 3-4 lines. 



Head finely rugose, the vertex black, the clypeus testaceous ; antennae rather robust, the third joint the longest, 

 the following joints of nearly equal length ; thorax more than twice as broad as long, the sides almost 

 evenly rounded and without angle, the posterior margin slightly sinuate at the sides, the posterior and 

 anterior angles acute but not produced, the surface with a more or less deep longitudinal depression at 

 each side (causing the basal portion to appear transversely raised), covered with rather long and close 

 yellowish pubescence which nearly obscures the finely rugose punctuation, in colour pale reddish-fulvous, 

 interrupted at the middle by a more or less black longitudinal band from the base to the apex ; scutellum 

 broad, black, finely rugose ; elytra nearly parallel ( S ) or slightly widened ( $ ), black, the extreme 

 margin narrowly raised, the entire surface finely and closely rugose, sparingly clothed with very short, 

 scarcely visible pubescence ; epipleurse rather broad, extending to the apex ; tibiae unarmed ; the first 

 joint of the posterior tarsi scarcely so long as the following two joints together ; the entire underside and 

 the legs rather shining, scarcely pubescent. 



Hah. Mexico, Puebla, Cordova {Salle), Oaxaca (Hbge); Guatemala, San Geronimo, 

 Senahu (Champion). 



The antennae in S. collaris are closely approached, and show only a slight dilatation 



