8^ [April. 



prothorax flattened, transversely quadrate, a little narrowed posteriorly, the 

 sides parallel at the base, the anterior angles dilated into an oblique, laterally 

 projecting, triangular tooth, the hind angles shai-ply rectangular, the basal 

 f oveae lai'ge, rounded, deep. Elytra very long, wider than the prothorax, rapidly 

 narrowing from about the basal third, the spine at tlie outer apical angle 

 elongate, the inner angle angiilate, the sutural stria extending to about the 

 apical half. Length (excl. spine) 10^, breadth 3 mm. ( $ ?). 



Hah.: ? Colombia [ex coll. Bowring). 



One specimen, certainly from Tropical America, acquired with 

 I. singularis by the Museum in 1871. Distinguishable from I. singu- 

 laris by the laterally projecting, dentiform, non-deflexed anterior 

 angles of the prothorax, and the more elongate elytra, with longer 

 apical spines. 



3. — Ischyotnius chevrolati, n. sp. 



Ischyomius singularis, Champ., B. C.-Ani., Coleopt., IV, I, p. 259, 

 pi. 11, figs. 17 & 17 fl, 6, r (1886). 



Castaneous or ruf o-testaceous ; prothorax slightly narrowed posteriorly, 

 with rather stout, strongly reflexed lateral margins, which are sinuate behind 

 the middle, the anterior angles rounded, without trace of angulation above, the 

 hind angles acutely rectangular, the basal foveae large and deep ; the puncturing 

 of the upper surface coarse, scattered, and irregular, becoming more diffuse on 

 the prothorax and fine towards the apex ; the spine at the outer apical angle of 

 the elytra long in ?, shorter in ^, the sutural stria extending to about the 

 apical third. Length 7-11, breadth 2-34 mm. ( (J $ ). 



Hah. : Panama, Chiriqui. 



A common insect in withered banana leaves in Chiriqui. 



4. — Ischyomius bicolor, n. sp. 



Elongate, fusiform, shining ; castaneous, the head (the mouth-parts 

 excepted), antennae, and prothorax black, the tibiae more or less infuscate. 

 Head sparsely, irregularly, the vertex closely, punctate, the transverse inter- 

 ocxilar groove almost smooth ; eyes large ; antennae with joints 4-10 more or 

 less serrate. Prothorax transverse, somewhat convex, sharply margined, the 

 sides parallel at the base, sub-angularly dilated at a little beyond the middle, 

 and arcuate thence to the deflexed, obtuse, anterior angles, the hind angles acute 

 and rectangular, the base sinuate ; sparsely, rather coarsely, irregularly punc- 

 tate, the basal foveae large, rounded, and very deep. Elytra long, about as 

 wide as the broadest part of the prothorax, rapidly narrowing from about the 

 basal third, somewhat broadly margined at the sides, the apices obliquely 

 truncate, the outer apical angle obtuse, the inner one sharply rectangular ; 

 sparsely, rather coarsely, irregularly punctate, the abbreviated sutural stria 

 deeply impressed towards the apex, the hiuneri depressed within. Ventral 



