24 On New Genera and Species of Heteromera. 



below. Prothorax subquadrate, wider than long, buf little 

 convex ; apex slightly sinuously emarginate ; front angles not 

 prominent ; sides very moderately rounded, a little incurved 

 before tlie hind angles, which are small, subacute, and out- 

 wardly directed ; lateral edges a little sinuous, unequally 

 thickened, and channelled within ; base feebly bisinuate, rather 

 thickly margined. Scutellum rather large, curvilinearly tri- 

 angular. Elytra elongate-oval, widest behind the middle, 

 and somewhat attenuate at apex, moderately convex, gradually 

 declivous behind ; base emarginate, scarcely wider than base 

 of prothorax, without trace of a thickened margin ; shoulders 

 a little oblique : epipleivral fold entire (though naiTow and 

 becoming vertical) behind. Metasternum short : inter coxal 

 process wide, rounded at apex : jprosternal process broad, 

 strongly tricarinate, the middle carina enclosed by the two 

 outer ; end broadly truncated. Mesosternum subhorizontal, 

 broadly concave in front, deeply and obliquely impressed at 

 each side above. Legs rather slender : tibice a little thickened 

 outwardly, obsoletely spurred : tarsi tomentose beneath ; first 

 joint of the posterior of nearly equal length to the last. 



This is the third known genus of the Gcelometopides^ having 

 at the same time both cheek- and throat-fmrows. From the 

 other two {Hypaulax and Chileone) this may at once be 

 distinguished by the elongate-ovate and less convex form, the 

 square prothorax, and the total absence of a thickened margin 

 to the base of the elytra. 



Astathmetus alienusy n. sp. 



Elongate-ovate, attenuate behind. Black, subopaque. 

 Throat-furrow a little arched : head (except the epistoma) and 

 prothorax indistinctly punctulate : elytra less opaque than the 

 prothorax ; on each elytron nine punctured striae, the striae very 

 fine ; the punctures narrow, oblong, well impressed, those on the 

 sutural row smallest, and becoming gradually larger and 

 stronger towards the sides ; a short scutellar row of four or 

 five punctures ; intervals smooth, impunctate, flat on the disk, 

 a little undulate at the sides : legs and underside shining black, 

 minutely punctulate ; flanks of prothorax smooth, impunctate ; 

 antennse and palpi pitchy, outer joints of the former dusky. 



Length 1 1 lines ; width of elytra behind the middle 4^ lines. 



Hob. Colombia. One example. 



[To be continued.] 



