the Tencbrionidiw of Australia dDc. 95 



ing in the sand, generally above, but often below, high-water 

 mark." Scytnena differs inter alia from Phaleria in its deciply 

 cniarginate clypcus. As the genera of the Trachyseelinie to 

 which it belongs have been much increased since M. Lacor- 

 daire's volume on the Heteromera was published, the follow- 

 ing table may be useful : — 



Antennse eleven-jointed. 



Antennas longer than the head. 



Prothorax closely applied to the elytra. 



Elytra ciliated at the margins Ecripsls, Pasc. 



Elytra not ciliated at the margins Pluileria, Latr. 



Prothorax not closely applied to the elytra .... Ilijucis, Pasc. 

 Anteuua3 shorter than the head. 

 Anterior tarsi retractile. 



Intermediate and posterior tarsi elongate, tili- 



form Isarida, Pasc. 



Intermediate and posterior tarsi short, stout. . Ammobius,ij\\6x. 

 Anterior tarsi not retractile. 



Antenufe with an abrupt three-jointed club . . Charodes,V\h\tQ. 

 Antennae gradually stouter outwards. 



Ch'peus deeply emargiuate Scymena, Pasc. 



Clvpeus entire anteriorly. 



Last tarsal joint as long as the rest toge- 

 ther Ammidium, Er. 



Last tarsal joint shorter than the rest 

 together. 



Posterior tarsi filifomi, elongate Ejnypsara, Pasc. 



Posterior tarsi short, stout. 



Last joint of maxillary palpi securi- 

 form Sjiharf/eris, Pasc. 



Last joint of maxillary palpi fusiform Anemia*, Casteln. 

 Antennae ten-jointed Trachyscclisf, Latr. 



Byrsax% saccharatus. 



B. oblongo-quadratus, iudumento albcscente tectus ; prothorace 

 utrinque autice explanato, postice eroso, disco supra valde gibboso 

 producto ; elytris grosse tuberculatis. 



Hah. Queensland (Pine Mountain, near IjDswich, in a 

 Boletus) . 



Oblong-quadrate, covered above with a tliiek spongy-look- 



* This genus, founded on an African (Senegal) insect, I have not seen ; 

 its place here may be somewhat doubtful. M. Laeordaire unites it, erro- 

 neously, -n-ith Ammidium (Gen. v. p. 725). A rare European insect {A. 

 sardoa) is referred to it. 



t M. Duval is the only author who has given the correct number of 

 antennal joints in this genus (Gen. Col. d'Eur. iii. p. 288). In reference 

 to his figure (pi. 71. tig. 352 i), I have failed to detect the moniliform 

 structure of the club, and the basal joint is much larger and curved 

 almost at a right angle. It must be recollected, however, that the whole 

 antenna is not larger than the point of a fine needle. 



I Pascoe, Journ. of Ent. i. p. 42. 



