LoxorKosorus. 153 



horizontal fovea ; on either side of and helow the point of intersection 

 are two distinct and prominent tubercles : the upper surface of the head 

 is granulated and fulvo-ferrugineous, with a dark-fuscous hand above 

 the base of the antennae and between the eyes. Thorax transverse, 

 rectangular, having the anterior and basal angles distinctly denned ; 

 the sides are parallel and straight ; a broad but slight postmedial 

 depression extends obliquely on either side in the direction of the 

 humeral angles ; the surface is distinctly punctate, fulvous, with two 

 medial clouded markings of fuscous. Scutellum small, triangidar, 

 fuscous. Elytra robust, strongly punctate-striate, clothed at the 

 base, and also at the sides and along the suture, with a slight ashy 

 pubescence ; in colour dark fuscous, the suture being (by reason of 

 the pubescence) narrowly fulvous, and the sides also being marked 

 by a fulvous line, which at the shoulder is distinct and broadly de- 

 fined, but becomes obsolete as it approaches the extremity. Antenna 

 much longer than the body, filiform ; the first joint narrow at the base 

 and dilated towards the apex ; the second short, ovate, not broader 

 than the base of the first ; the third, fourth, fifth and sixth very long, 

 attenuate, somewhat dilated at the apex ; in colour dark fuscous, 

 with the base of the second, third, fourth and fifth fulvous. Legs 

 ferrugineous, with the anterior tibiae and part of the tarsi, and also 

 the apex of the posterior femora, dark fuscous. 



From the district of the Eiver Amazon. 



3. Loxoprosopus humeralis. B.M. 



L. oblongo-ovatus, peircdlelus, sat robustus, fulvusj capite brcvi, 

 sulproducto, super basin antennarum bituberculato; thorace trans- 

 verso, angiitis anticis distinctis, ad basin et ad latent late depresso, 

 punctato, fulvo, ad medium piceo ; elytris parallelis, punctato- 

 striatis, ad basin sparsim pubescentibns, fuscis, ad latcra flavo- 

 lineatisj antennis fMformibus, art. 1-bflavo-ftiscis, 6-11 fuscis; 

 pedibus fuscis, femoribus ad basin flavis, tibiis tarsisque posticis 

 rufo-flavis. 



Long. corp. 2 lin., lat. 1 lin. 



Oblong-ovate, parallel, finely pubescent, fuscous black, occasionally 

 fulvous. Head short, transverse, and, when viewed laterally, reflected 

 in front backwards at an acute angle to the base ; the anterior and 

 lower portion of the head (which is somewhat produced) is almost 

 impunctate, black, shining; from the labrum a triangular marking ex- 

 tends to the insertion of the antennas ; the antennae are approximate, 

 and on the angle caused by the abrupt reflection ; eyes distant, situate 

 at the base of the head, and not extending laterally as far as the line 

 of the margin of the thorax ; between the eyes (and immediately above 



