ZEPHTEUS. 385 
Zephyrus coelistis. (Plate xxvil. fig. o, c^ .) 
Thecla coelistis, Leech, Entomologist, xxiii. p. 191 (1890). 
Male. Bright blue ; primaries ■with broad black band on outer margins, the apical portion 
extending nearly to middle of the costa, from this point to the base the costa is edged with 
black. Secondaries : two black spots just above anal angle (one on each side of submedian 
nervure) ; the submarginal band is black and fairly broad at apex, and this colour is con- 
tinued halfway up the whitish abdominal margin. Fringes greyish, preceded by a black line 
on the secondaries ; tail black, tipped with white. Under surface russet-brown : on the 
primaries there is an indistinct discal spot, and beyond it an oblique silvery-white line 
extending from costa to first median branch; submarginal line bluish white, ill defired 
towards apex, and edged internally with black towards the inner margin, which is broadly 
grey : secondaries have a silvery-white central transverse line and a bluish-white sinuous 
submarginal line ; the latter is edged internally with blackish, and the former is twice angn- 
lated above the anal angle and terminates about the middle of abdominal margin; anal angle 
is black, and above it is a broad orange-red patch extending from first median nervule to 
end of central line on abdominal margin ; the black spots are reproduced, but that nearest 
the anal angle has a blue centre : fringes as above, but the black line at their base is preceded 
by a bluish one towards anal angle. 
Female. Similar to the male, but the black band of jjrimaries is much broader and contains an 
orange patch, which is bisected by the second median nervule ; the costa and fringes are 
tinged with fulvous ; the marginal band of secondaries is also broader. 
Expanse 42 millim. 
Var. nigricans. AH the wings have a slight blackish suffusion, the apex and outer margin of 
primaries are very broadly bordered with black ; the outer margin of secondaries is also broadly 
black, and this colour projects from the inner edge of the marginal band along the ncrvules. 
Both forms occur at Ta-chien-lu, Omei-shan, and Moupin, in June and July, 
up to 8000 feet. The type has only been received from Wa-shan, Pu-tsu-fong, 
and Ni-tou. 
Zephyrus betulae. (Plate XXVIII. figs. 8, 11, vars.) 
Papilio bciiila', Liniueus, Syst. Nat. x. p. 482 (1758). 
Ztphyrus betido', Kirbv, Cat. Diurn. Lep. p. 403 (1871). 
Thecla betulcB, Lang, Butt. Eur. p. 75, pi. xvii. fig. 1 (1884). 
Thecla elwesi, Leeeh, Entomologist, xxiii. p. 39 (1890). 
" Expands 1-25 to 1-50 inch. The ground-colour of the wings in both sexes is dark brown ; all 
the wings have the fringes whitish brown. The head, thorax, and abdomen are black above, 
but the legs and palpi are white beneath ; the antennae are black, ringed with white. The 
male has a faintly black oblong discoidal spot on the fore wings, and external to it a light 
but inconspicuous patch ; the hind wings have the tail orange, and a small orange patch at 
the anal angle. The female differs from the male in having a large and bright orange patch 
on the fore wings external to the discoidal spot, crossed by two or three black veins, and 
occupying nearly a fourth of the area of the wings. The underside is nearly the same 
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