TETRAG0N0TES. 57 



margins of the eyes ; eyes tolerably large and prominent, situated 

 near the base of the head ; the surface is deeply punctate, and 

 black. Thorax broader than the head, elongate, subparallel; the 

 anterior angles are depressed and distinct; the sides are finely 

 but evenly marginate, with a lateral angulated projection, ante- 

 medial, and broadly defined ; the surface of the thorax is more 

 equate than in T. elegans; the sides are broadly depressed, and thero 

 is an absence of any abrupt elevations on the anterior disc ; the 

 surface is deeply punctate throughout, and black. Scutellum trian- 

 gular, rounded at the apex, impunctate, black. Elytra broader than 

 the thorax, subelongate, punctate-striate, and (when seen under a 

 high power) clothed with a very fine squamose pubescence. Antenna 

 robust, filiform, rufo-piceous. Legs piceous, the base of the femora 

 being flavous, and the posterior tibia? testaceous. 



T. atra is almost identical in the details of its structure with T. 

 elegans, except in the formation of the surface of its thorax ; there is 

 here such a complete difference, that I have not hesitated in deciding 

 them to be two distinct species. Constancia ; taken by Mr. Gray and 

 myself, January 1857. 



3. Tetragonotes calceata. 



T. oblongo-ovata, subparattela, subpubescens, Jlavo-ferruginea ; 

 capite elongatulo, ad medium {infra antennarum basin) longitu- 

 dinaliter carinato, supra oblique carinato ; thorace elongato, an- 

 gidis anterioribus subacutis, ad latera marginato et (ad medium) 

 dentato, punctato, nigro ; elytris subparallelis, punctato-striatis, 

 Jlavo-pubescentibus, flavo-ferrugineis, ad humeros, latera, sutu- 

 ram, et macula longitudinali media inter strias 5 et 7, nigris ; 

 antennis Jiliformibus, fuscis; pedibus nigris. 



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



Oblong-ovate, subparallel, slightly depressed, finely pubescent, 

 flavo-ferrugineous. Head broadly subelongated; from the upper part 

 of the labrum a longitudinal medial carination extends upwards 

 to the base of the antenna?, from whence it diverges on either side in 

 an oblique direction, terminating at the inner margin of the eyes ; 

 the surface finely punctate. Thorax elongate, not much broader than 

 the head; the anterior angles subacute and depressed; the sides 

 marginate, depressed, and produced antemedially into an obsolete 

 tooth ; at the base transversely depressed ; the antemedial centre of 

 the disc is elevated into two obsolete and glabrous tubercles ; the 

 surface is coarsely and irregularly pimctate, black. Scutellum tri- 

 angular, fuscous. Elytra subparallel, broader than the thorax, finely 

 punctate-striate, the punctures being frequent, and the strias almost 



