BY E. W. FERGUSON. 383 



minent, subcostiform. Legs as in typical specimens. Dimen- 

 sions : Q.19 x 8 mm. Type in Macleay Museum. 



Very close to T. ambiguus, of which I regard it as a variety, 

 and not a constant one. Recently I have had, under examina- 

 tion, a series of specimens belonging to the Queensland Museum. 

 On comparing the two types, T. dubius is almost without trace 

 of clothing, and has distinct setigerous granules on the second, 

 fourth, and sixth. T. ambiguus has dense clothing, a feeble row 

 of setae along the position of the second interstice, and none 

 along fourth or sixth. These differences, I believe to be partly 

 the effect of abrasion, and partly due to variation. In the 

 Queensland Museum specimens, one can trace varying degrees of 

 difference in both these details; one specimen before me, greatly 

 abraded, has the second as prominent as the third and costiform, 

 while the fourth is not even setigerous. Males corresponding to 

 the type (9) of T. dubius have the anal excavation as in corres- 

 ponding males of T. ambiguus. 



flab. — Queensland : Gowrie, King's Creek. 



Lataurinus, n.g. 



Type, Talaurinus rugiceps Macleay. 



Head large, broad ; forehead flattened, continued on into 

 rostrum in same direction, strongly setigero-granulate. Rostrum 

 hardly excavate; internal ridges short, very prominent, obliquely 

 set, subtended behind by a V-shaped groove separating rostrum 

 from head; median area briefly carinate in centre. Scrobes wide, 

 arcuate. Eyes ovate, set fairly low down. Prothorax evenly 

 granulate. Elytra foveate. 



The remarkable differences in the rostral structure and the 

 granulate head, seem to entitle this species to, at least, subgeneric 

 rank. It seems hardly possible to refer it, and one or two others 

 here separated, to the same genus as T. typicus ; but these 

 aberrant forms differ so widely, inter se, as to make it impossible 

 to refer them all to a common genus. The present genus seems 

 closest to Peritalaurinus, but, inter alia, differs in the less convex, 

 granulate head, and in the absence of the nodules at the base of 

 the rostrum. From Sclerorrhi?iella, the strongly developed 

 internal ridges, and differently set eyes, should be distinctive. 



