THRASYGCEUS. 



10:5 



antennae are at their insertion approximate, and immediately below 

 and between the inner margin of the eyes. 



Head small, transverse, not produced in front, inclined at right 

 angles to the plane of the elytra. 



Thorax broader than the head, and relatively broader than in the 

 adjoining groups, transverse, slightly constricted in front ; the ante- 

 rior angles considerably depressed ; the surface subequate ; the sides 

 rectilinear and marginate ; the basal line sinuate. 



Scutellum triangular, impunctate. 



Elytra broad, robust, subdepressed, punctate-striate ; in some 

 species finely pubescent, and variegated in colour. 



Legs : anterior femora sufficiently robust, slightly dilated anteme- 

 dially. The tibice are straight (inflected at the immediate base), 

 longitudinally ribbed or marginate, slightly dilated towards the apex. 

 The tarsus (Tab. IV. fig. 3 d) is short ; the first joint subelongate, 

 triangular, of breadth equal to that of the tibia ; the second shorter, 

 broader ; the third broader still, transversely bilobed, margined with 

 rigid pubescence ; the apical joint is elongate, slightly incurved, 

 and incrassated towards the apex. The terminal claw is bifid, each 

 member consisting of a double claw of equal length. The posterior 

 femora are very broadly incrassated, ovate, gradually attenuated to- 

 wards the apex ; at the base broadly truncate — the junction of the 

 femur to the metathorax being at an angle of this truncation. The 

 tibice (Tab. IV. fig. 3 g) are short and straight ; the surface is not 

 cylindrical, but trilateral — the posterior surface being, near the apex, 

 subsinuate in outline ; the apical socket, hi which the tarsus is in- 

 serted, is elongate and truncate. Of the tarsi (Tab. IV. fig. 3 h) 

 the basal joint is elongate, and widened towards the apex, obliquely 

 truncate ; the second of the same form, but shorter ; the third sub- 

 cylindrical. 



This genus is allied to Ewpeges in the form of its thorax, as well 

 as of the posterior femora and the maxillary palpi. Its totally dif- 

 ferent facies however (less ovate and less parallel), the thorax rela- 

 tively smaller, and the elytra more robust, besides some difference 

 in the form of the posterior tibia, compel us to feel that it ought to 

 constitute a separate, although a closely allied genus. 



1. Thrasygceus eximius. (Tab. IV. fig. 3.) 



T. oblongo-ovalis, latus, sat robustus ; capite hand produeto, brevi, 

 antice glabro, ad basin grarmlato, nigro ; thorace transverso, 

 antice constricto etiamque depresso, angidis anterioribus subacutis, 

 ad basin transverse depresso, subpubescenti, punctulato ; ehjiris 

 robustis, punctatis (baud striatis), pubescentibus, nigris, maculis 

 quatuor magnis (duabusque minutis ad scutellum) pallide Jtavis ; 



