Australian and Tasmanian Cryptocephalidcs. 337 



g. Eleventh joint (or part of it) of 

 antennae darker than tenth, 

 at least in male. 

 h. Elytra with sharply defined 

 black markings, at least in 

 male. 

 i. Apex of elytra entirely dark 



in male Ca. luctuosus, Chp. 



i.i. Apex of elytra not entirely 



dark in male Ga. quadrivittat\(s, Chj). 



h.h. Elytra without distinct mark- 

 ings Ca. notJtus, n. sp. 



g.g. Eleventh joint of antennae no 

 darker than tenth. 

 /(.. At least the five terminal joints 



of antennae dark in male . . Pr. hifasciata^ Snd. 

 /(./(.. Antennae (except sometimes 

 for parts of the basal joints) 

 entirely pallid. 

 i. Scutellum acutely costate . . Ca. riigicollis, Gray.* 

 i.i. Scutellum rather feebly ridged Pr. cognata, Snd. 

 F.F. Prothoracic margins entire. f 

 G. Upper surface of uniform 

 colour and brightly me- 

 tallic.J 

 li. Elytra with distinct longitudi- 

 nal ridges, antennae (except 

 first and eleventh joints) 



pallid Cr. metallicus, n. sp. 



h.h. Elytra without distinct ridges, 

 antenna; dark. 

 i. Elytra densely and irregularly 

 punctate, the punctures fre- 



* The S23ecies usually regarded as Cr. ruhiginosus, Boi. 



"f In a few species they could not strictly speaking be called 

 entire, but at most there are but' two feeble notches ; the upper 

 surface in most of the species is highly polished, but in a few it is 

 subopaque. 



X Although the upper siirface is more or less uniform there are 

 sometimes various metallic shades of colour, but in none of the 

 specimens is the upper surface diluted with red. Cr. scabrosiis, 

 Oliv., and allied species (which are black or blue with a metallic 

 gloss) are excluded, and somewhat doubtfully. Cr. Jacksoni, Guer. 

 is included. 



