372 STUDIES IN AUSTRALIAN ENTOMOLOGY, XV., 



at humeral angles; apex sinuate and with margin interrupted by 

 an internal plica on each side; interstices convex, without a basal 

 striole on first or second, third irapunctate. Prosternum leevigate, 

 bordered between cox?e; episterna finely shagreened. Mesosteryial 

 episterna densely punctate. Metasternum on each side, and 

 episterna densely punctate. Ventral segments not transversely 

 sulcate, densely punctate, except in middle between ambulatorial 

 set£e. Legs short : femora short; anterior tibiae with apex wide, 

 rounded and spinose externally; tarsi short, glabrous on upper 

 surface, onychium glabrous beneath, ungues simple; anterior tarsi 

 with first joint about as long as three succeeding joints together, 

 strongly produced at apex internally in an elongate spiniform 

 process, joints 2-4 successively shorter, second with apex sharply 

 produced internally; posterior tarsi slender, first joint about as 

 long as three succeeding joints together, these successively shorter, 

 fourth very small; posterior trochanters with a setigerous puncture 

 near base. 



The position of this genus is evidently near Stomonaxus, which 

 is unknown to me in nature; it differs from Motschulsky's 

 description of the genus Stomonaxus by mandibles short, first 

 joint of antennse longer than third; I believe, too, that the form 

 of the prothorax (shaped somewhat like that of ^j)hnidius, 

 lateral basal impressions feebly marked, base wide and obtusely 

 angled) is altogether different from the form of the prothorax in 

 Stomo7iaxus. 



COSMODISCUS RUBRIPICTUS, n.sp, 



Piceous-black; prothorax with border testaceous; elytra with 

 ferruginous pattern (ferruginous pattern reaching the fourth inter- 

 stice at base, spreading over the three outer interstices on the 

 middle of the sides, sending off a wide oblique uneven fasciaform 

 branch inwards on each elytron to join the corresponding branch 

 of the other elytron at the suture about apical third), lateral 

 channel testaceous backwards to apical sinuosity, inflexed margin 

 ferruginous, infuscate opposite metepisterna; coxea, middle of 

 metasternum, mesosternum, prothorax, and under parts of head 



