478 Mr. H. W. Bates on Longicorn Coleoptera. 



the south of Brazil. I do not know whether the latter may not 

 be the form described by Serville as D. caliginosus, his descrip- 

 tion not being sufficiently exact to decide. D. caliginosus, how- 

 ever, is generally considered to be synonymous with D. scrupu- 

 losus of Germar. 



Genus Ozotroctes, nov. gen. 



Head somewhat narrow, antenniferous tubercles raised and 

 oblique. Palpi obliquely truncated at their apices, the labial 

 more strongly so than the maxillary. Thorax obtusely uni- 

 tuberculate on the sides, furnished with two very distinct tuber- 

 cles on the disk. Prosternum simply rounded; mesosternum 

 much narrowed behind, steeply inclined in front. Elytra very 

 slightly truncated at the apex. Legs and tarsi constructed as in 

 Acanthoderes : the male sex, however, is as yet unknown. The 

 antennas are simple, the basal joint pyriform-clavate, shorter 

 than the third ; the second and third joints slightly furrowed 

 above. 



The truncation of the palpi and the attenuation posteriorly 

 of the mesosternum amply distinguish this genus. The shape 

 of the palpi is an anomaly amongst the Lamiaires, the pointed 

 terminal joints being one of the very few characters which di- 

 stinguish the tribe from the Cerambycides. The facies of the 

 insect composing this genus, however, is entirely that of a La- 

 miaire, the shape of the thorax and elytra being almost precisely 

 that of certain abnormal species of Acanthoderes, e. g. A. hebes. 



Ozotroctes punctatissimus, n. sp. 



O. oblongo - ovatus, subdepressus, obscure brunneo - ferrugineus : 

 corpore supra punctis rotundis innumerosis impresso. Long. 

 4* lin. $ . 



Head brown, punctured. Antennae about as long as the 

 body, rufo-piceous, all the joints ringed with a paler shade. 

 Thorax with the dorsal tubercles very distinct, conical, the rest 

 of the surface almost even, punctured. Elytra very slightly 

 truncated at the extreme apex, the centro-basal ridges short, the 

 whole surface covered with punctures of a uniform size, partly 

 arranged in rows. Beneath ashy-brown, shining. Legs dull 

 ferruginous, spotted with a paler shade. 



One individual, beaten from dried twigs in woods near San- 

 tarem. 



[To be continued.] 



