418 REVISION OF THE GENUS SEIROTRANA, ETC., 



— Boisduval specially mentions one case (' Faune de l'Oceanie ' 

 p.6l) — such cases are extremely rare; and some remaining mark, 

 usually the thoracic vitta, remains to mark the species. C. aus- 

 trails, however, is a common form, with a definite habitat (South 

 Queensland), constant in colour and form. I have examined 

 a considerable number of both species, and note the following 

 distinguishing characteristics : — 



C. australis Boisd. — Antennce finer, third joint longer than 

 fourth. Head : frontal punctures fewer and more irregular. 

 Prothorax without lateral yellow band; disc with four (or more) 

 large foveate depressions; median part of disc lightly and dis- 

 tantly punctate, punctures small. Elytra of wider form, with a 

 tendency to swollen middle; more convex; punctures in striae 

 small; basal part of elytra transversely strigose, especially towards 

 sides; apex acutely angulate; sutural part longest. Prosternum 

 distantly punctate. Metasternum faintly punctate. 



C. imperialis Don. — Antennce stouter, third joint about equal 

 to fourth. Head : frontal punctures dense and regular. Pro- 

 thorax with yellow band; disc in general with no regularly placed 

 large foveas; median part of disc much more coarsely and densely 

 punctate, punctures large. Elytra of narrower and more tapering 

 form; less convex; punctures in striae larger; basal part without 

 any transverse strigosity; apex rounded. Prosternum strongly 

 and coarsely punctate. Metasternum coarsely punctate. 



A specimen of C. imperialis from Tasmania is less coarsely and 

 less densely punctate than specimens from the mainland, but 

 even this presents markedly different sculpture from that of any 

 specimens of C. australis that I have examined. 



Stigmodera caudata, n.sp. 



Oblong, feebly enlarged at the posterior third. Head, antennae, 

 pronotum, prosternum, and ovate patch on elytral apex brilliant 

 shining blue. Elytra otherwise yellow with margins red. 

 Beneath, except prosternum and legs, brilliant [metallic blue- 



