Discocephalin£e and Peiitatoniinse. 435 



Galgacus, gen. nov. 



General characters of Dictyotus, but differing from that 

 genus by the much more elongate body ; scutellum only 

 about half the length of the abdomen, abruptly narrowed and 

 angulated at apex ; coriura much shorter than in Dictyotus^ 

 with the apical margin almost straight ; membrane large, 

 the venation reticulate; connexivum broad and moderately 

 directed upwards. 



Galgacus macer. 

 Dictyotus macer, Walk. Cat. Het. i. p. 182. n. 14 (1867). 

 Hah. South Australia. One specimen (Brit. Mus.). 



ArniSCUS, gen. nov. 



Head about as long as the pronotum, the lateral lobes sub- 

 laminate, a little longer than the central lobe, moderately 

 sinuate on lateral margins, convexly rounded at apices j an- 

 tennse with the second joint a little longer than the third, 

 second joint considerably passing the apex of head. Pro- 

 notum with the lateral angles broadly and convexly prominent, 

 their apices obtuse, and slightly raised upwardly and £or- 

 wardly. Scutellum move than half the length of the abdomen. 

 Kostrum reaching the posterior coxa3 ; second and third joints 

 subequal in length. 



ArniSCUS humeralis. 

 Scioeoris humeralis, Dall. List Hem. i. p. 135. n. 13 (1851). 

 Hah. Australia. (Type, Brit. Mus.) 



Genus NiPHE. 



Nt'pTie cephalus. 

 Pentatoma cephalus, Dall. List. Hem. i. p. 245. n. 32 (1861). 

 Pentatoma lateralis, Walk, Cat. Het. ii. p. 301 (1867). 



Genus Tropicorypha. 



Tropicorypha ventralis. 

 Pentatoma ventralis, Dall. List Hem. i. p. 243. n. 25 (1851). 



Tropicorypha rufescens. 

 Agonoscelis? rufescens, Walk. Cat. Het. iii. p. 546 (1868). 



