328 



seventh interstice are certainly smaller in the variety than in the 

 typicai form, but in the fernales of both they are often much alike, 

 Some spécimens of the variety are stouter than any I hâve seen of 

 the typicai form. The tubercles of the prosternum are much the 

 same in both foriiis and are sHghtly variable in both and the tipof the 

 rostrum in also slightly variable and in the same way in both forms. 



Var. obsoletus, n. var. 



Two spécimens before me appear to represent another variety in 

 which the extrême form of dégradation of elytral tubercles of costae 

 occurs. One is from Western Australia but the other is without a 

 locality label. 



Their third fifth and seventh elytral costae are just perceptibly 

 raised, the two conjoined suturai tubercles are small but fairly 

 distinct, the third interstice has a very small tubercle close to the 

 conjoined ones and none elsewhere, except one marking its junction 

 with the seventh, the latter has a few small tubercles, the fifth 

 interstice has only one small tubercle and which is situated just 

 beyond its middle; ail thèse tubercles though small are fairly acute. 

 The elytral punctures are almost regular. The prothoracic impres- 

 sion is clearly defined and almost parallel-sided from base to apex, 

 and on one of the spécimens contains a very feeble médian carina. 

 The rugosities of the prothorax are less pronounced than in the 

 normal form. 



The scales are dense and of a pale fawn colour, and in addition 

 there are short stout semidecumbent setœ on the upper surface, 

 but on the lower surface (except parts of the sterna) and legs 

 the setcfi are longer and much thinner. — Length 20-21 mill. 



Var. carinatus n. var. 



Two spécimens (sexes) from N. W. Australia probably represent 

 another extrême. 



The third interstice is carinated, smooth, shining and quite 

 regular to near the middle, where there is a semi-detached tubercle, 

 then there are three at equal lengths from each other (the third 

 just before the suturai ones, thèse being rather acute) and towards 

 the apex an acute tubercle or spine marking the junction of the 

 third of seventh interstices, the fifth interstice has about eight 

 small tubercles, and the seventh from seven to eleven (1), thèse 

 becoming more acute posteriorly. The tubercles, although not 



(1) On both spécimens they vary in number ou each side. 



