563 



beneath hair, sparse ones elsewhere. Spurs to hind tibiae long, 

 wide, unequal, and obtuse. Length 24-27 mm. 



Hab. —South Australia: Ooldea. Type, I. 7823. 



The simple medio-frontal prothoracic horn associates this 

 species with monstrosus, but that species has the prothoracic 

 cavity much less densely clothed (to the naked eye it appears 

 glabrous) and the horns much longer, elytra darker, etc. ; the 

 clothing on the pronotum and scutellum is almost as dense as 

 on the under-surface, it is even fairly dense on the back parts 

 of the horns, but their front parts are glabrous. Six specimens 

 were obtained at lights. 



PSEUDORYCTES GRISEOPILOSUS, n. Sp. 



PI. xxxv., fig. 57. 

 S . Black ; parts of legs somewhat paler, antennae 

 castaneous. Densely clothed with greyish hair, but elytra 

 and apical half of pygidium glabrous. 



Head with fairly numerous punctures; clypeus almost 

 vertical, semicircular, margins strongly elevated, especially 

 the hind one; mentum moderately prominent. Antennae 

 ten-, club three-jointed, its rami unusually large. Prothorax 

 with a wide, deep, median excavation, bounded on each side 

 and in front by a strong, curved, simple horn, the front one 

 projecting over head; with numerous, rather small, partially 

 concealed punctures. Elytra very little wider than widest part 

 of prothorax, sutural and marginal striae deep, the others 

 rather shallow but containing rows of rather large punctures, 

 which become sparse or absent posteriorly. Spurs to hind 

 tibiae moderately long, unequal, and rather sharply pointed. 

 Length, 12 mm. 



Hab. — South Australia: Wirrabara. Type (unique), I. 

 7821. 



The mentum is more swollen than is usual in Cavonus, 

 and less than in Pseudoryctes, and the club of the antennae 

 is larger than usual in either genus (quite as large as on most 

 species of Corynophyllvs) : but as the prothoracic cavity is 

 filled with hair the species has been referred to Pseudoryctes. 



Pseudoryctes nigripennis, n. sp. 

 PI. xxxv., figs. 70, 71. 

 d ■ Bright-castaneous ; elytra and part of head black. 

 Rather densely clothed with reddish hair, but elytra and 

 apical two-thirds of pygidium glabrous. 



Head almost impunctate ; clypeus almost vertical, semi- 

 circular and rather deeply concave; mentum prominent. 

 Antennae ten-, club three- jointed ; rami of club about as long 

 as head is wide. Prothorax with a wide and deep median 



