BY THOMAS G. SLOANE. 317 



The only Australian Cicindelid larva which I have seen is 

 that of Megacephala australis Chaud.; this corresponds thoroughly 

 with the general description given by Leconte,* 



The two tribes found in Australia may be differentiated 

 thus : — 



Prothorax with pronotum projecting forward beyond prosternum at sides. 

 Prosternal sulcus not continuous with apical pronotal sulcus. Scutellum 



on peduncle, hidden by prothorax, not dividing elytra at base 



Megacephalini. 



Prothorax truncate at apex. 



Prosternal sulcus continuous with the apical pronotal sulcus. Scutellum 

 large, not hidden by prothorax, dividing elytra at base... . Cicindelini. 



Tribe Megacephalini. 

 Genus Megacephala. 



I follow Horn in placing all the Australian species of Mega- 

 cephalini in one genus; but I have not tried to arrive at reasons 

 why former writers called one species a Megacephala and 

 another a Tetracha; nor why M. Fleutiaux saw such decided 

 differences in M. cylindrical, Macl., that he suggested a distinct 

 genus, Pseud otetracha, for it. M. Fleutiaux seems to have 

 missed the most decided character isolating M. cylindrica and 

 M. frenchi SI., namely, the short basal stalk of the labial palpi 

 (see figs. 11 and 12). In any case M. spenceri SI., and M. greyana 

 SI., together with M. howitti Cast., seem to greatly reduce the 

 value of the differences sought to be established in the tables 

 given in his "TroisiemeNote surles Megacephalidae d'Australie"! 

 In M. spenceri the posterior femora do not reach the apex of the 

 abdomen; in M. greyana these femora do not extend beyond the 

 apex of the abdomen in the female, but do so slightly in the 

 male; in M. hoivitti ($) they extend beyond the apex of the 

 abdomen ; these species are all wingless, and to my mind 

 congeneric. 



* Classification of the Coleoptera of North America, p. 4 (Washington, 1883). 

 t Kevue d'Entomologie, 1899, p. 46. 



