8 The Cane Grubs of Australia. 



(13) Pronotal angles subacute ; males without a projection on the head = (14). 

 Pronotal angles broadly rounded . . . . . . • . . . . . = (15). 



(14) Ninth dorsal abdominal segment with a distinct median groove 



= Repsimus oeneus. 

 Ninth dorsal abdominal segment with a faint median groove at base only 



= Anoploqnathus boisduvali. 



(15) Cremaster fromi dorsal aspect divided as two small semi-acute projections 



= Isodon puncticollis. 



Cremaster from dorsal aspect more or less divided but not showing two small 

 projections . . . . . . . . . . . . . . . . = (16). 



(10) First dorsal abdominal segment depressed below the metanotum, the seventh 

 not raised like the sixtli, the ninth with a median carina ; pronotum in the 

 male on two planes . . . . . . . . . . = Horonotus optatus. 



First dorsal abdominal segment not depressed below the metanotiim, the seventh 

 raised like the sixth, the ninth without a median carina ; pronotum in the inale 

 convex, not on two planes . . . . . . . . . . . . = (17). 



(17) Legs longer, the intermediate tarsi nearly attaining apex of elytra, the posterior 

 tarsi attaining the ninth abdominal segment 



= Semanopterus depressiusculus. 



Legs shorter, the intermediate tarsi not nearly attaining apex of elytra, the posterior 

 tarsi attaining the fifth abdominal segment . . = Dasygiiathus australis. 



ANOPLOGNATHUS Sp. No. 686. 

 See table of species. Body more or less wholly white. 



ISODON PUNCTICOLLIS Macleay. 



Distinctly smaller than Dasygnathus australis, Stage III. being more 

 nearly equal in size to Stage II. of that species. Head of a lighter colour ; 

 pubescence throughout generally finer. In most specimens examined, the 

 mandibles bore no small tooth just laterad of the retinaculum, but this 

 character was found in one specimen; thus the character is variable, at 

 least in this species, though it has not been found so in any other case. 



Stage III. — Width of head, 4 mm. 

 Stage II. — Width of head, 8 nnn. 

 Stage I. — Width of head, 1-75 mm. 



DASYGNATHUS AUSTRALIS Boisd. 



The supposed Stage II. larva on which the description is based in 

 Bulletin No. 2, is evidently a different species, possibly a Stage III. larva 

 of Isodon pwiicticollis. 



Stage ///.—Width of head, 6-10 mm. 

 Stage //.—Width of head, 8-50 mm. 



LEPIDIOTA Sp. No. 45. 



There may be as many as eight seta' on the first anteunal joint, and 

 three on the second, the first of these long, the second and third short 

 (albohirta may have a second short seta) ; there are about three irregular 

 rows of setae anteriorly of the anal path, which has up to sixteen 

 delimiting setae on either side. 



Stage //.—Width of head, 6-25 mm. 



