88 mb. f. p. pascoe on the longicoenia of austealia. 



Hathltodes. 

 Mycerino affinis sed differt prsecipue prosterno simplici, baud antice 

 producto. 



In Mycerinus dprcadioides, Serv., tLe prosternxim is raised, pro- 

 duced, and transversely expanded in front, and, the propectus 

 being reduced to a mere line, the head, or rather the under sur- 

 face of the oral organs, rests against it. To this genus, which 

 originally received the name of Hathlia from Dejean, but which 

 was first described by M. J. Thomson*, several species have been 

 referred by Hope, Blanchard, Gruerin, and myself; they all diifer, 

 however, in the very important structural character mentioned 

 above, and they also differ considerably among themselves. With 

 the exception of one species, which will be referred to presently, 

 I propose, notwithstanding, to retain all the Australian species in 

 this genus. Nevertheless it might have been thought desirable 

 to distinguish between those species with a fusiform outline, like 

 Hathliodes grmnmicus, and those with the humeral angles of the 

 elytra projecting beyond the base of the prothorax, like S. quadri- 

 maculatus \ but then this character not only varies in degree in 

 the species, but it also varies to a certain extent in individuals, as 

 in a. aridus. M. J. Thomson formed his genus Mycerinopsis on 

 the latter, chiefly on account of its longer antennge ; but its affinity 

 to H. quadrilineatusf, Hope, is, I think, too close to allow of its 

 separation. H. lineellics is a somewhat degraded form of the 

 genus ; while Sathlia gracilis and H. procera, the latter a Ceylon 

 species, are altogether aberrant^. The following species, which 



* This is not quite correct, M. Gu^rin-Meneville having pointed out in his 

 'Iconographie' (p. 428), but in an irregular sort of way, the characters which 

 distinguish Hathlia (or Hailia, as it was there spelt) from Apomecyna, to which 

 it had been united by Serville. 



t This is a variable species, black to greyish oclireous, with pale or whitish 

 lines, some of which are occasionally obsolete. 



% Hathlia Buckleyi, Pasc. (Trans. Ent. Soc. ser. 2. iv. p. 107), I propose to 

 separate from all the above; its genus I may briefly characterize here: — 



Marmylaris. 

 Caput magnum. A^itennm corpore paulo longiores, articulo quarto tertio fere 

 aequali, cseteris brevioribus. Prothorax capite baud latior, transversus, cy- 

 lindricus. Elytra valde convexa, parallela, prothorace vix latiora. Pedes 

 validi. Pro^ et mesosterna ut in Lychrosi. 

 A narrower and more convex form than any of the preceding, with larger head, 

 &c. M. SucMeyi is a peculiar species, white, the elytra covered with numerous 

 very distinct black spots ; it is from India. M. J. Thomson's Mycerinus vari- 

 pennis appears to be referable to this species. 



