nOMAMMATTJS. 119 



under a high power) with fine ferrugineous pile. Scutellum trian- 

 gular, impunctate, fuscous. Elytra hroad, rohust (considerably 

 broader than the thorax), with punctures arranged in the form 

 of striae ; a broad antemedial depression extends transversely and 

 obliquely upwards towards the humeral angles, giving an appearance 

 of prominence to the scutellary angles ; the surface glabrous, except 

 at the sides and apex, which are subpubescent. Antennas sufficiently 

 long and robust, filiform ; the third and fourth joints slightly attenu- 

 ated ; first to fifth flavous, sixth to eighth black, ninth and tenth fla- 

 vous, eleventh black. Legs flavous, the anterior tarsi and posterior 

 femora being fuscous. 



I captured a single example of this insect at Tejuca (near Rio 

 Janeiro) in January 1857. 



2. Homammatus nitidus. (Tab. IV. fig. 8.) 



H. ovatus, robustus, glaber, rufus ; capite parvo, depresso, impunc- 

 tato, nigro ; thorace transverso, pcene quadrato, ad basin depresso, 

 impunctato, nigro ; elytris latis, levissime punctatis, antemediis 

 transverse (et oblique humeros versus) depressis, impubescentibus, 

 rvfis ; antennis robustis, subincrassatis, nigro-fuseis ; pedibus 

 anterioribus piceis, posticis rufis. 



Long. corp. 2\ lin., lat. 1-1^ lin. 



Ovate, broad, glabrous, of a bright red colour. Head short, trans- 

 verse, produced and attenuated anteriorly ; eyes very large (in com- 

 parison with the breadth of the head), situated close to the basal 

 line, and extending laterally not so far as the anterior angles of the 

 thorax : below the insertion of the antennae is a longitudinal medial 

 carination, and two others (one on either side of it) obliquely trans- 

 verse ; above the base of the antennae is a distinct V-shaped carina- 

 tion, extending obliquely upwards nearly to the base of the head ; on 

 either side of this, the margin of the eyes is bounded by a minute 

 and regular fovea, which extends parallel to their inner and upper 

 circumference : the surface is black and impubescent, at the base 

 punctate. Thorax transverse (almost quadrate) ; the anterior angles 

 depressed and subtruncate ; the sides marginate ; at the base is 

 a slight transverse depression, which gives to the anterior part of 

 the thorax a sub cylindrical form; surface impunctate, bright gla- 

 brous, black. Scutellum small, triangular, rufous. Elytra much 

 broader than the thorax, robust, subdepressed ; under a high magni- 

 fying power very finely punctate, the punctures being arranged in 

 the form of stria? : an antemedial transverse depression is continued 

 upwards and obliquely towards the inner part of the shoulder, 

 causing the base (near to the scutellary angles) to appear raised and 



