134 TRICHOPTERYGIDA. 
Thorax widest before the base. 
Thorax and elytra with erect sete. 
Size small; antenne yellow. . . . . . . « «© + «© © «© © minor. 
Size larger; antenne black. . . . . «©. . ee ee © ©) grandicollis. 
Thorax and elytra without erect setz. 
Elytra much narrower than the thorax . . . . . . . . + . amgustipennis. 
Elytra scarcely narrower than the thorax . . . . . . . . . excelsa. 
Thorax not wider than the elytra. 
Entirely castaneous . . . . . 1. 1 we ee ee ew we ee Bidilatata. 
Head and thorax black, the elytra rufous. 
Abdomen castaneous (without erect sete) . . . . . . . . . © Orevior. 
Entirely black. 
Antenne flavescent . 2. 2. 2 1 1 ew ee ee ee ee eee grit. 
Antenne black . . 2... 1. 1. 1 ee ee ee eee ee CNG. 
Thorax narrower than the elytra. 
Body very short and shining . . . 2... ee. we we eee. trea. 
Body elongate, pubescent . . . 2... 1 we ee ee ee ee Ube. 
1. Trichopteryx godmani. (Tab. III. fig. 20.) 
Trichopteryx godmanni, Matth. Trans. Am. Ent. Soc. xi. p. 1281. 
Convexissima et latissima, nigra, nitidissima, pilis brevibus argenteis vestita; capite modico, oculis sat parvis ; 
pronoto permagno, latissimo, valde dilatato, ad basin latiore, angulis posticis latis valde productis, disco 
nitidissimo, tuberculis minutis, ordinibus irregularibus dispositis, confertim ornato, interstitiis leviter sed 
confertim reticulatis, lateribus modice rotundatis, leviter marginatis, marginibus atque angulis posterioribus 
dilutioribus; elytris fuscescentibus, brevioribus, postice valde attenuatis, lateribus fere rectis, ordinibus 
transversis sinuatis confertim levissime asperatis ; pedibus lete flavis; antennis flavescentibus. Long. corp. 
}2-1 line=1-87-2 millim. 
Head rather small and pointed in front, very convex, shining, and almost smooth ; eyes moderate; antenne 
moderate, obscure yellow. Thorax very large and very convex, much dilated posteriorly, widest at the 
base, with the sides rounded and slightly margined; closely covered with minute tubercles in irregular 
rows, With the interstices closely and finely reticulated ; basal margin sinuated, with the angles pale, broad, 
and much produced. Scutellum rather large, triangular, closely and finely asperated. Elytra fuscescent, 
rather short, rather narrower than and nearly as long as the head and thorax, much attenuated posteriorly, 
with the sides nearly straight, closely and finely asperate in nearly straight transverse rows; apex broad, 
slightly rounded, paler, with the extreme edge white. Abdomen considerably exserted, with the apex 
obtuse and bidentate. Legs robust, bright yellow, with the anterior tibiae and the basal joints of the tarsi 
dilated. 
Hab. GuateMaLa, Balheu in Vera Paz (Champion '). 
Three specimens. Differs from all other species of the genus in its very large size, 
convex and broad shape, and also in sculpture. This is the largest and finest species 
of Trichopteryx yet discovered. 
2. Trichopteryx grossa. 
Acratrichis grossa, Motsch. Bull. Mose. xli. part 2, p. 177°. 
Trichopteryx grossa, Matth. Trans. Am. Ent. Soc. xi. p. 128’. ’ 
Latissima, convexissima, nigra, nitida, pilis griseis parce vestita, setis validis nigris erectis utrinque armata ; 
