ON TUE GENUS CH ALCOCYRKBUS. 23 



second abdominal segment and another near the apex of 

 each elytron , with white hairlike scales of moderate den- 

 sity. These white scales are often rubbed off, as is already 

 mentioned, and a female specimen of 11,5 ram. length 

 and of a more blackish green tint in the collection of 

 Mr. Faost has lost them all on the second ventral seg- 

 ment and also, except one or two on each side, on the 

 elytra. The type of superbus ^ erroneously described by me 

 as a female, measures 12,5 mm., and is of a somewhat 

 bluish green colour, like Lema cyanella L.; the apical spot 

 on the elytra is almost entirely rubbed off, and therefore 

 it is not mentioned in my diagnosis. The specimen in 

 Mr. van de Poll's collection agrees perfectly with the type, 

 but it is a little smaller (9 mm. without the rostrum). 



Ch. bispinosus guttifer resembles cdhoguttatus Voll. 

 with regard to the postspinal dots , but the antespinal 

 mark is wanting and the femora are red and hardly mu- 

 cronated. 



Ch. bispinosus aruensis. This local-race differs from 

 the typical species by the extension of the postspinal mark , 

 which begins close behind the spine on the third spatium 

 and extends over the fourth and fifth spatium like an 

 oblique and outward-directed band ; the fourth spatium 

 shows sometimes, besides the ante-apical mark, a basal 

 dot like in Ch. Richteri Faust. Scutellum strongly impressed 

 along the middle. 



Ch. bispinosus australis, with dark bluish green 

 elytra and the basal half of the fifth stria more strongly 

 impressed than in the typical species, has on the fourth 

 spatium a basal , an antespinal and a postspinal , densely 

 scaled mark ; the latter extends inwardly somewhat beyond 

 the fourth stria. 



Ch. bispinosus intermcdius. The unique specimen is 

 a female of 11,5 mm. length (without the rostrum) and 

 resembles Richteri Faust by the blackish femora. 



Ch. Richteri Faust. The female in the collection of 

 Mr. van de Poll measures 13,5 mm. and shows no supra- 



Notes from the Leyden IVluseiim, Vol. XVIII. 



