268 Mr.J.S8. Baly on new Genera and Species of Hispide. 
productis, humeris in spinam acutam lateraliter modice extensis ; 
utroque quadricostato ; spina humerali, vitta lata submarginali ab 
humero ad longe pone medium extensa, apice subdilatata, macula 
prope angulum posticum fasciaque subapicali inter angulos ex- 
tensa rufo-purpureis, eneo tinctis, angulo postico metallico- 
purpureo. 
Long. 4 lin. 
Hab. Cayenne. 
This species may at once be distinguished from the rest of its 
congeners by the form of the thorax, the sides of which, straight 
for a very short distance at the base, are thence obliquely 
narrowed to the apex, being but slightly sinuate behind the 
apex; its anterior angles produced into an acute tooth; surface 
depressed and indistinctly excavated transversely behind the 
middle, rugose-punctate ; centre of disk in front nearly impunc- 
tate, impressed with the usual longitudinal groove. Base of 
epistome produced into a transverse ridge. Face furnished, 
between the insertion of the antenne, with an acute ridge, 
Genus MicrorHoPAaLa. 
Corpus ovatum, modice convexum. Caput exsertum, inter ocu- 
los vix productum ; epistomate clevato, rugoso; antennis validis, 
subinerassatis, articulis 5 ultimis clavam elongatam formantibus, 
7° duobus preecedentibus eequali aut longiore, 8t--11™™ inter se 
coalescentibus, lineis suturalibus fere obsoletis; mento elongato. 
Thorax subconicus, subeylindricus, derso depressus. Seutel/am fere 
transversum, apice obtuso. /ytra thorace latiora, leniter ovalia, 
apice rotundata, angulo postico obsoleto; dorso medice convexa, pro- 
funde punctato-striata. Pedes robusti, mediocres, simplices, tarsorum 
anticorum articulo basali parvo, sequentibus angustiore ; unguiculis 
contiguis. 
Type, Microrhopala vittata, Faby. North America. 
Microrhopala is so closely allied to Odontota that itis difficult 
to separate it from that genus; and possibly ultimately it will 
merge into one of its numerous subdivisions ; for the present, the 
ovate body will serve to separate it. 
Microrhopala vittata, Faby. 
H. vittata, Fabr. Syst. Eleuth. ii. p. 64. n. 31; Oliv. Ent. vi. 770. n. 20, pl. 2. 
fig. 20 a, b. 
M. clongato-ovata, conyexa, nigro- aut rufo-fusca ; antennis pedibus- 
que nigris; elytris punctato-striatis, interstitiis alternis subcos- 
tatis, obscure fusco-eeneis, utroque vitta lata fulva. 
Long. 3 lin, 
* Var. a: thorace lete rufo; elytris cyaneis, vitta angustata margine- 
