of the Amazon Valley. 47 



mesosternum being plane instead of tumid, and also in the style 

 of coloration, although agreeing in general form as well as in the 

 shape of the tarsi. The genus Trypanidim is unknown in the 

 Amazons region. 



Atrypanius conspersus, Germar. 



Lamia conspersa, Germar, Ins. Spec. nov. p. 474. 



A. ellipticus, griseus, carneo nigroque conspersus : capite carneo-fulvo, 



fronte grisea : elytris plaga irregulari pone medium alteraque api- 



cali griseis nigro maculatis, apice breviter oblique truncatis. 



Long. 4-6 lin. S $ . 



The species has a wide range, being found near Rio Janeiro, 

 on the Upper Amazons, and in Mexico. I see no diflference in 

 specimens which I have compared from all these widely distant 

 countries. 



Genus Probatius (Dej. Cat.), Thomson. 

 Thomson, Classif. des Cerambyc. p. 16. 



Body elliptical. Antennse scarcely one and a half times the 

 length of the body, furnished with short stiff hairs, some of 

 which are arranged in whorls around the tips of the joints. 

 Thorax shghtly convex, its outline curvilinearly widening from 

 the front to the tips of the lateral spines, which are placed near 

 the hind angles : ovipositor not produced in the females ; ter- 

 minal dorsal plate truncate and bidentate in both sexes ; corre- 

 sponding ventral plate obtuse, and, in the females, slightly 

 notched. Elytra setose, even, briefly truncated and generally 

 spined at the apex. Legs moderate ; thighs clavate ; tarsi short ; 

 basal joint of the hind foot about as long as the two following 

 taken together. 



This is one of the best-defined and most homogeneous genera 

 in the host of variable forms constituting the group Leiopodinse. 

 The character drawn from the apical abdominal segment is 

 seen to be constant here, bringing together species agreeing 

 in facies and many other points, but greatly diversified in colours 

 and markings. 



1. Probatius Chryseis, n. sp. 

 P, ellipticus : capite thoraceque auratis : elytris viridibus sericeis, 



nigro setosis, apice mucronatis ; abdomine testaceo-rufo. Long. 



5-6 lin. 6 2 . 



Head and thorax shagreened, of a rich golden colour shading 

 into green with the play of light, naked. Antennse black, setose ; 

 thoracic spines large, acute, pointing obliquely rearwards, and 

 placed very near to the hind angles. Elytra of a breadth nearly 

 equal to three-fourths their length, thence narrowing to the 

 apex, which, in each elytron, is prolonged into an Acute spine ; 



