320 



Lyb^ba amplicornis, Lea (nov/ Dietliusa). 



The types of this species are males. Two females from 

 the Victorian Alps appear to belong to the species. They 

 differ from the types in being slightly larger, rostrum thinner 

 and fully the length of prothorax, with smaller and less 

 crowded punctures, antennae inserted rather more distant 

 from apex of rostrum, two apical joints of funicle and the 

 club distinctly narrower (although of larger size than usual), 

 four front tibiae each more dilated at apex, with a narrow 

 tooth or spine commiencing at the upper apex and slightly 

 diverging from the oblique line of apex (much as in the 

 females of M. -fioridus and D. hlackhurni) ; second segment 

 of abdomen at its greatest length in middle, where the length 

 is about once and one-half that of the third segment, and 

 with each side less conspicuously embracing the side of the 

 third. 



Lyb^ba squamivaeia, Lea (now Diet hnsa). 



When describing this species I was mistaken as to the 

 sexes ; the specimens noted as probably being males are really 

 females; in addition to the differences of the front tibiae the 

 males dift'er from the females in having the rostrum slightly 

 shorter, with the antennae inserted rather closer to the apex, 

 and the metasternum and basal segment of abdomen with a 

 wide shallow depression common to both. 



Neomelanterius subtxjberculatus, Lea. 



The type of this species is a male; a female (from Com- 

 boyne in New South Wales) differs in having the rostrum 

 considerably longer (when at rest the tip is actually upon the 

 base of the abdomen instead of near it), the apical half shin- 

 ing, with sm.aller and less crowded punctures, and basal half 

 more feebly carinated. The antennae, instead of being in- 

 serted at about one-third from apex of rostrum, are inserted 

 almost in the exact middle. 



A female, from the Cairns district, apparently belongs 

 to the species, but has the elytra castaneous, and their punc- 

 tures larger and more clearly defined than on the type, or 

 than on the Comboyne female. 



Mechistocerus similis, n. sp. 



d ■ Black; antennae and tarsi red. Densely clothed. 



Head with coarse partially-concealed punctures. Ocular 

 fovea subtriangular. Rostrum long and thin; basal third 

 with concealed punctures and three narrow ridges, elsewhere 

 shining and with minute punctures. Scape inserted one-third 

 from apex of rostrum; second joint of funicle distinctly 



