of the Amazons Valley. 85 
allied to Colydiun, but to differ in its perfectly smooth prothorax ; 
in habit it resembles Sosylus ewxilis. 
Trenytha sosyloides. (Pl. V. fig. 4.) 
I, elongata, castanea, nitida ; elytris modice carinatis, interstitiis biseriatim 
punctatis. 
Hab. Ega. 
Elongate, narrow, reddish chestnut, shining; head slightly exserted, 
subquadrate, a slightly impressed triangular mark in front; eyes large, 
lateral, nearly round; antennz ferruginous, longer than the head, the 
basal joint incrassate, concealed at its insertion, the second only a little 
larger than the third, the remainder to the eighth gradually becoming 
shorter, the last three forming a club, which is about one-third of the 
total length of the antenna; prothorax elongate, subcylindrical, the 
sides straight, slightly and gradually contracting towards the base, 
truncate anteriorly, moderately punctured; scutellum rounded poste- 
riorly ; elytra broader than the prothorax at the base, the sides parallel, 
the posterior third sloping towards the apex, each with four (including 
the sutural) slightly elevated but rather broad lines, which are irregu- 
larly punctured, the interstices with two rows of punctures; legs pale 
ferruginous; tibize subtrigonate, shortly spurred at the extremity; tarsi 
_ slender, the basal joint a little longer than the succeeding one, claw- 
joint shorter than the three basal joints together; body beneath dark 
chestnut, rather remotely punctured; first segment of the abdomen 
scarcely larger than the second, its interfemoral process very narrow, 
dividing the posterior coxee. Length 13 line. 
OcHOLISSA. 
Caput retractum, subtriangulare, antice rotundatum, ocwlis prominulis. 
Antenne 11-articulate, basi tects, clava triarticulata. Palpi crassi, 
breves, labiales obtusi, mazrillares oblique truncati. Prothorax qua- 
dratus, levis. Hlytra parallela, levia. Tibie subtrigonatee, breviter 
calcarate. Tarsi graciles, articulis tribus primis brevibus. Corpus elon- 
gato-ovatum, subdepressum., 
Nearly allied to Aulonium, from which it differs in the smooth 
prothorax, slender, simple tibize, and shorter tarsi. Other species of 
this genus have been detected by Mr. Wallace in New Guinea, and 
are found also in Batchian, Mysol, Sula, dec. 
Ocholissa leta. (Pl. V. fig. 1.) 
O. castaneo-fusca, nitida; elytris tertia antica maculisque magnis duabus 
apicalibus flavis; antennis pedibusque ferrugineis. 
Hab. Ega. ‘ 
Dark chestnut-brown, shining; head somewhat triangular, rounded 
anteriorly, finely punctured ; eyes distant, prominent, close to the pro- 
