46 Mr. G. J. Arrow on the 



rubris, femoribus tibiisque aut viridibus aut pallidis ; sat brevis 

 et convexa, clypeo minute rugoso, sutura recta, vertice irregu- 

 lariter grosse punctato ; pronoto brevi, eonvexo, subtiliter irregu- 

 lariter punctato, lateribus medio fortiter angulatis ; scutello paulo 

 punctato ; elytris striis 5 dorsalibus profundissime impressis et 

 crebre punctatis, reliquis grosse punctatis, sexta antice abbre- 

 viata ; pygidio fortiter transversim strigato, basi maculis 2 grossis 

 setosis ornato ; mesosterno antice verticali, recte angulato ; 

 corpore subtus ad latera sat longe griseo-piloso, abdominis 

 segroentis lateraliter transversim bisectis, longe vix biseriatim 

 pilosis. 



This is a small species of rather elongate form, with the 

 shoulders rather prominent, the dorsal striae extremely deep 

 and strong, and the intervals very convex. The pronotum 

 is very distinctly punctured and deeply emarginate in front 

 of the scutellum ; the hairy patches on the pygidium are 

 remote and not produced towards the apex, and the meso- 

 sternum is truncate squarely in front and not produced. The 

 hairy clothing of the lower surface is long and shaggy, but 

 not thick. 



Length 8 mm.; breadth 4*5 mm. 



Hab. Formosa : Tai-nan. 



In my paper on the Ruteline Coleoptera of Ceylon (Ann. 

 & Mag. Nat. Hist. (8) viii. 1911, p. 354), I pointed out that, 

 contrary to the opinion previously held, only a small propor- 

 tion of the Ceylonese Rutelinae occurred also on the Indian 

 mainland ; but amongst this small number of species common 

 to both I included the only species of Popillia found in 

 Ceylon, following Kraatz and Ohaus, both of whom had 

 made special studies of this insect and its varieties. Later 

 investigation has shown that this species is no exception, but 

 that the Indian forms determined by those authors as 

 belonging to it are really distinct. The Ceylon insect must 

 be called P. discalis, Walk., that being the oldest of the 

 names bestowed upon it, for complanat a, New m., the name by 

 which it has been known, belongs to a mainland form (the 

 type is a female) superficially like it, but structurally 

 different. 



Identical colour-phases recur through a series of different 

 species in this group, so that description of the colours alone, 

 as has been thought sufficient hitherto, is quite valueless. 

 Specimens from Southern India submitted to Dr. Kraatz 

 by Mr. H. E. Andrewes and to Dr. Ohaus by myself have 

 been determined by them as belonging to the numerous 

 colour-phases of the so-called P. complanata, showing that 



