BT EUSTACE W. FERGUSON. 401 



culate ; clypeal plate more or less sunken, not esserted ; submentum with median 

 forwardly projecting lobe. Scrobes short, straight, ending some distance in 

 front of eyes. Eyes rotundate, rather coarsely faceted. Prothorax shaped much 

 as in Hyborrhi/nchufi; anterior margin produced slightly, without ocular lobes; 

 disc with a row of tubercles on each side of median area; lateral margins tuber- 

 culate. Elytra very broad ; suddenly narrowed to base, which is contained be- 

 tween the projecting ends of the third interstices; apex rounded, not emarginate 

 nor mucronate; disc striate-punctate ; interstices granulate. Venter more or 

 less flattened in d", convex in 9. Legs moderately long; tarsal joints short. 



The present genus is proposed for the reception of two species — Acantholop- 

 hus convexiusculus Macl. and Jlyhorrhynchus crassiitsculus Macl. 



The position of the former of these has been a good deal questioned. Mac- 

 leay described the species as an Accmtholopliiis, but subsequently in describing 

 mcisterm, which is certainly not specifically distinct, he placed it under Hybor- 

 rhynchiis. Lea (Trans. Roy. Soc. S. Aust., 1903, p. 112) in recording the above 

 synonymy, states that the species belongs to the same genus as Cubicorrhynchit-s 

 spinicollis Macl. With this I do not agree, and in revising the genus Acantho- 

 lophtcs I tentatively referred A. convexiusculus to Hyborrhynchus. It seems 

 better now to form a new genus for it and for H. crassiusculus which is con- 

 generic. 



Parahyborrhynchus differs from Hyborrhynchus in its shorter broader form, 

 in the more deeply set clypeal plate, and in the short scrobes. The shape of 

 the rostrum is also somewhat different but the difference is scarcely definable. 

 The two species may be separated thus: 



Supraorbital crests large and conspicuous P. coiu'exinsru/us M.av]. 



Supraorbital crests granuliform ; with a pair of frontal granules, not quite in the 

 same line P- crassiusculus Macl. 



Pabahyborrhtnchus convexiusculus (Macl.) 



Acantholophus convexiusculus Macl., Trans. Ent. Soc. N.S. Wales, i., 1866, 

 p. 330; Lea, Trans. Roy. Soc. S. Aust., 1903, p. 112. 



c?. Small, narrow across prothorax, broad across elytra, strongly convex. 

 Black; rather densely clothed with brown depressed pubescence, with traces of 

 greyish vitta on elytra. 



Head somewhat rugulose above, with a short noduliform ridge somewhat 

 obliquely set on each side of middle, with indications of an almost obsolete median 

 ridge ; supraorbital crests large, trianguliform, rather obtuse, projecting for- 

 wards and upwards and slightly outwards. Rostrum short and wide, rather 

 deeply excavate above, external margins strongly raised in a large obtuse 

 tubercle, sinking to base and apex ; internal ridges low, convergent to base. An- 

 tennae slender; funicle with second joint longer than first, other joints short; 

 club short, not pedunculate. Eyes small, rotundate. 



Prothorax broader than long, the anterior margin slightly produced abo\'e; 

 median area moderately deeply depressed; submedian tubercles 4 in number on 

 each side, small, erect, obtuse; lateral margins with a single, large, outwardly 

 projecting tubercle, slightly in front of middle, and with a small granule near 

 posterior angle. 



Elytra much wider than prothorax, broadly ovate, strongly declivous pos- 

 teriorly; base with strong forward projecting tubercles at ends of first and third 

 interstices; width across the outer of these equal to width of base of prothorax; 

 disc with rows of fairly definite punctures; the interstices granulate, the gi-anules 

 more marked on the posterior portions of the third and fifth interetices, which 

 appear feebly raised; fifth and seventh interstices with small nodules at base. 



