the Australian Longicornia. 559 



covered with golden hairs ; inner spine at the apex of the elytra 

 much smaller than the outer one, the rest as in Cerarnbyx serious, 

 Newm. (Hammaticherus turbinaticornis, Germ.) 



Cerambyx, Linn., is now restricted to those Longicorns of 

 which Cerambyx cerdo, Linn., is the type. Many authors sub- 

 stitute for it Hammaticherus (Meg,, Dej.), but the Hammaticherus, 

 Serv., must be confined to H, bellator and its allies, {Ploccederus, 

 Dej.). 



Genus Obrium. 

 1. Obrium cilialum. 

 O. castaneum, nitidum, albo-setosum ; elytris, lateribus ex- 



ceptis, stramineis ; antennis ferrugineis, setosis. 

 Sydney. 



Glossy chesnut-brown (except the elytra), with long, slender, 

 white hairs ; head with a deep transverse impression above the 

 epistome ; eyes rather large, black ; antennae longer than the body, 

 ferruginous, with long setose hairs, a small spine at the apex of 

 the third joint ; prothorax slightly punctured with few hairs, the 

 disc irregular, with a rounded callosity on each side ; scutellum 

 rounded behind ; elytra elongate, parallel, with deeply impressed 

 crowded punctures, from each of which issues one of the seta- 

 ceous hairs, of a pale straw-colour, with the two basal thirds of 

 the sides only brown ; body beneath dark chesnut, polished, paler 

 on the abdomen ; in the female the four basal segments of the 

 abdomen have on each of their sides an ovate cavity, filled with 

 closely-set yellowish hairs. 



Length 3| lines. 



In our Obrium cantharinum and its congeners, as well as in 

 Stenhomalus, Deilus, dec, the third abdominal segment of the 

 female is curiously contracted, and densely clothed with long 

 hairs. In Obrium ibidionoides there is a transverse, ovate, hairy 

 cavity at the base of each segment, except the last. In the species 

 described above we see a third modification of this remarkable 

 structure. It is probable, however, that this and other species 

 now referred to Obrium will eventually be separated from that 

 genus, if these and other characters should prove to be of more 

 than specific importance. 



Genus Piialota. 

 Caput subverticale' ; fronte turgida : mandibulis parvis. Oculi 



Q Q 2 



