154 L0X0PK0S0PUS. 



the insertion of the antennae) are two small transverse tubercles, 

 while behind them (between them and the base of the head) is a 

 medial depression ; the upper surface of the head is fulvous. Thorax 

 transverse, slightly constricted at the base ; the anterior angles 

 (which extend beyond the base of the head) are depressed, subacute, 

 and distinct ; sides submarginate : at the base is a broad and well- 

 defined transverse depression, which extends obliquely upwards in a 

 broad lateral depression towards the anterior angles ; this lateral and 

 basal depression gives a circular and subglobular form to the anterior 

 and medial surface, which is finely and thickly punctate : fulvous, ex- 

 cept the surface immediately in front of the basal depression, which is 

 piccous, this darker colour adumbrating more or less the whole of the 

 raised portion of the disc, — the line of margination and the anterior 

 margin being also narrowly and obscurely fuscous. Seutellum broad, 

 triangular, obscure, below the plane of the elytra, darkly fuscous. 

 Elytra parallel, tolerably robust, coarsely punctate-striate, imperfectly 

 clothed at the apex with fine ashy or fuscous pubescence ; from the 

 humeral angles (which extend beyond the base of the thorax) a line of 

 flavous colouring is produced along the margination, most distinctly at 

 the shoulders ; occasionally the suture also is margined with flavous. 

 Antenna; equal in length to the body ; the first joint distinctly in- 

 crassated at the apex ; the second short, ovate, and much less robust ; 

 the third longer than the first; the fourth and fifth nearly equal, 

 and shorter than the first ; the rest short, with a distinct tendency 

 to dilatation, and subpubescent : the first joint is in colour rufo- 

 fuscous ; the second fuscous ; the third, fourth and fifth flavous, with 

 the apex fuscous ; and the rest dark fuscous. Legs pale flavous, with 

 the anterior tarsi, tibiae, and upper portion of the femora, and also 

 the apex of the posterior femora, fuscous. 



Collected by Mr. Bates at Santarem (Amazon). A single specimen 

 in the collection of the British Museum ; in the collections also of 

 Mr. Bates and the Rev. H. Clark. 



This species is subject to considerable variation in the closeness of 

 the pubescence, and also in the flavous margination of the elytra; in 

 one example before me the thorax is entirely flavous, and the sutirral 

 and marginal band of flavous well-defined and broad. 



4. Loxoprosopus cseruleus. 



L. oblongo-ovatus, robustus, nigro-cyanms, tuiidus ; capite brevi, ad 

 apicem reflexo, impunetato, fufoo-ferrugineo ; thoraee transverso, 

 rectangulari, ad basin distincte transv&rsi depresso, apud angulos 

 anticos etiam obsolete depresso, nitido, fulvo-ferruyineo ; elytris 



