New Genera and Species of Phytophaga. 255 
Sp. 10. Charistena trilineata. * 
Subelongata, angustata, subcylindrica, dorso subdepressa, rufo- 
fulva, nitida; antennis (basi excepta) scutelloque nigris; 
elytrorum vitta suturali, alterdque laterali, hac ante apicem 
abbreviata, obscure cyaneis; vertice, thoracis lateribus an- 
guste, tibiarum apice tarsisque piceis; thorace rude punc- 
tato, basi non transversim depresso, disci medio obsolete 
longitudinaliter sulcato. 
Long. 14 lin. 
Hab. Yucatan. 
Thorax transversely convex, its sides parallel, slightly rounded ; 
elytra depressed along the suture, lateral and apical edges 
minutely but not closely serrate; apex of abdomen obscure 
fuscous. 
The more depressed form both of thorax and elytra will serve 
to separate this species from Ch. Pilatei. 
Collection of Rev. H. Clark, and my own. 
Genus METAXYCERA. 
Corpus obcuneiforme, dorso depressum. Caput inter oculos 
vix productum ; antennis 11-articulatis, rigidis, subfusiformi- 
bus, apice acutis, modice robustis, corporis dimidio brevi- 
oribus, articulis cylindricis, duobus basalibus brevibus, primo 
paullo incrassato, tertio modice elongato; oculis vix promi- 
nulis; mento oblongo, lateribus medio sinuatis. Thorax 
transversus ; lateribus pone medium fere rectis, antice angus- 
tatis, sinuatis ; angulo antico acuto, seepe dente parvo armato; 
dorso modice transversim convexo ; basi transversim depressa. 
Sculellum truncatum. Slytra thorace latiora, a basi ad 
apicem ampliata; apice obtuso aut rotundato, angulis pos- 
ticis obtusis aut rotundatis; anguste marginata, margine 
serrato; dorso depressa, utraque quadricostata, costa tertia 
minus distincta, interspatiis profunde bifariam punctatis. 
Pedes mediocres, modice robusti; larsorum articulo basali 
parvo; unguiculis contiguis. Abdomen sutura inter segmenta 
duo basalia ventris distincta. 
Type Metaxycera purpurata, Guér. 
This genus is (like the last) nearly allied to Odontota ; but 
although much more different in habit, it is more difficult to find 
good differential characters. It may, however, be separated by 
the slight prominence of the head in front, by the subfusiform 
cylindrical 11-jointed antennze, and the distinct sutural line be- 
