ZEPHTEUS. 



369 



Referring to this species, M. Grum-Grsliimailo (Rom. siir Lcp. iv. p. 387) 

 says that in Central Asia two forms occur — the type, which inhabits the 

 prairies, principally at an altitude not exceeding 3200 feet ; the other form, 

 which he describes as var. carbonaria, and Hgures on pi. viii. fig. 9, inhabits 

 the sub-alpine zone at about 9000 feet. 



The only form of this species occurring in China appears to be var. davidi, 

 and, so far as I am aware, the specimens taken by I'Abbe David are the only 

 known examples from that country. 



Grum-Grshimailo (Horaj Ross. 1891, p. 452) describes two forms of the 

 species from North-eastern Thibet — var. tangutica, from the Dshachar Moun- 

 tains, and var. iliensis, from Suidun. Judging from the description, the 

 former seems, to come very near to var. davidi, Oberthiir. 



Genus ZEPHYRUS. 



Zephyrus, Dalman, Kong. Vet.-Akad. Hand, xxxvii. pp. 62, 90 (1816) ; de Niceville, 



Butt. Ind. iii. p. 299 (1890). 

 Dipsas (part.), Westwood, Gen. Diurn. Lep. ii. p. 479 (1852). 



" Pore wing large, subtriangular ; costa regularly arched, apex subacute, outer margiu slightly 

 convex or straight, inner margin straight; costal nervure reaching to about half the length 

 of the wing, terminating just opposite to the apex of the discoidal cell, first subcostal nervule 

 given otf from the subcostal nervure at about two thirds the length of the discoidal cell ; 

 second subcostal nearer to the apex of the cell than to the base of the first subcostal, third 

 subcostal originating rather nearer to the apex of the wing than of the cell ; upper discoidal 

 nervule given off from the subcostal some distance beyond the apex of the cell ; middle disco- 

 cellular nervule nearly straight (slightly concave), upright, lower discocellular longer than 

 the middle discocellular, concave, slightly outwardly oblique ; second median nervule given 

 off before the end of the cell ; submedian nervure straight. 



" Hind wing large, broadly ovate, the extremity of the first median nervule elongated into a fine 

 tail, variable in length (very short in the European Z. quercus, Linnteus, and entirely absent 

 in Z. khasia, de Niceville), and the anal angle produced into a larger or smaller anal lobe ; 

 first subcostal nervule arising from the subcostal nervure rather near to but before the apex 

 of the cell ; discocellular nervules nearly in one straight line, outwardly oblique, the upper 

 rather shorter than the lower ; second median nervule arising just before the lower end of the 

 discoidal cell. 



" Eyes hairy. 



" Antennce clavate, the club very gradually formed. 



" Paljji somewhat long, obli(piely porrected, the third joint horizontal, the second joint very 

 bristly beneath, third joint naked. 



" Laeva short, thick, onisciform, tapering towards each end, clothed with fine short hair. 

 Pupa short, thick, rounded." (de Niceville, I. c.) 



