313 
of the Amazon Valley. 
6 . Opliistomis semifulvus, n. sp. 
$ . Minus elongatus,, postice vix attenuatus^ fulvo- 
rufus; elytris (margine basali maculaque humerali ex- 
ceptis) nigris j an tennis vix incrassatis ; thorace crebre 
punctato^ linea dorsali Isevi ; apicibus femorum^ tibiarum 
et tarsorum nigris. 
Long. 44 lin. 
Hah. — Ega. 
7. Opliistomis alhicollis. 
Euryptera alhicollis ^ Pascoe, Journ. Entom. i. 63. 
Elongatus, niger^ thorace (vitta dorsali excepta) macu- 
laque elongata elytrorum testaceo-flavis ; capite testaceo- 
flavo, epistomate nigro-plagiato ; antennis articulis basi, 
coxis femoribusque plus minusve testaceis. 
^ . Gracilis ; antennis longitudine corporis, apicem 
versus vix incrassatis; elytris medio paulo angustatis, 
ante apicem paululum iterum dilatatis. 
$ . Eobustior ; antennis dimidium corporis paulo 
superantibus, medio (haud apicem versus) incrassatis; 
elytris elongatis, parallelogrammicis, ante apicem paulu- 
lum rotundatis. 
Hah, — St. Paulo, Amazons. 
The form of the rostrum, and the terminal ventral seg- 
ment of the male, demonstrate that this species belongs 
to Ophistomis rather than to Euryptera. 
Genus Eurypteea. 
Serville, Encycl. Meth. x. 688 ; Lacord. Gen. viii. 454. 
1. Euryptera atrip ennisj n. sp. 
Curta, postice paululum dilatata, punctata, pubescens, 
subnitida, fulvo-rufa, elytris (macula humerali excepta) 
nigris, tibiis tarsisque posticis fuscis ; antennis robustis, 
medio paulo incrassatis ; capite antice satis elongate et 
angustato, epistomate punctate polite; thorace minus 
dense punctulato; elytris ante apicem paulo rotundato- 
