374 



not reaching the base of prothorax, gradually widening to 

 apex, joint 3 shorter than 4-5 combined, 5-8 obconic, 9-11 oval. 

 Prothorax 4*5 x 9 mm. (length measured in middle), widest at 

 base, arcuate-emarginate at apex, bisinuate at base; anterior 

 angles very widely rounded, sides arcuately diverging to base, 

 posterior angles very acute and produced; explanate margins 

 wide, concave in front, not separated or differentiated from 

 disc; the latter very minutely, not closely punctate, with a 

 faint depressed medial line. Scutellum large, triangular, dis- 

 tinctly punctate. Elytra as wide as prothorax at base and 

 about three and a quarter times as long, parallel, subcylindric, 

 becoming more convex apically; lateral margin very narrow, 

 but of uniform width throughout; humeral angle obtuse and 

 clearly denned, extreme border nitid and reflexed ; seriate- 

 punctate, with eighteen rows of punctures, rather larger and 

 more distant than in P. planus, Bless., the rows tending to 

 become confused and obliterated at base, and obsolete at apex ; 

 intervals flat on the middle, the alternate intervals beginning 

 with the ninth variably and slightly convex, a depression on 

 each side at the base, and (in one example) depressed behind 

 the scutellum ; prosfernum carinate and together with the sides 

 of metasternum slightly granulose. Abdomen istriolate; tibice 

 coarsely punctate. Dimensions — 18-21 x 8*5-9*5 mm. 



Hah. — Queensland: Marmor (H. W. Brown). 



Mr. Brown took a number of this species at Marmor. It 

 belongs to sect. ii. of my table/ 2 ) and should be placed near 

 elongatus, Macl., which differs markedly in having all its alter- 

 nate intervals sharply costate and the seriate punctures very 

 large. Type in author's collection. 



PTEROHELiEUS OPACUS, n. Sp. 



Elongate, subparallel, convex; opaque-black above, nitid 

 beneath ; antennae and tarsi red, the latter and,, the tibiae 

 clothed with bright-red tomen turn. 



Head very wide across the middle ; epistoma widely 

 arcuate, and continuous with the rounded and strongly-raised 

 canthus; depressed below the level of the forehead and separ- 

 ated from it by an arcuate suture; surface strongly punctate; 

 eyes separated by a distance equal to the diameter of one; 

 antennae rather long and stout, extending to the base of 

 prothorax, joint 3 shorter than 4-5 combined, cylindric, 4-8 

 obconic, 9-10 nearly round, 11 oblong ovate. Prothorax 

 5*5x9 mm., widest at base, arcuate-emarginate at apex; an- 

 terior angles widely rounded, bisinuate at base, posterior angles 

 widely acute, scarcely produced, sides arcuately diverging to 



(2)Proc. Linn. Soc, N.S.W., 1910, p. 125. 



