580 HESPEEIID.E. 
(if //. aheus which also agree with them. M. Grum-Grshimailo has 
described this form as '■Pyrgus ' alveus, var. sifanicits *. 
Graeser met with the species commonly at Pokrofka in June, and 
Standinger records var. fritillum, Hiibner, from Minussinsk, Saissan, and 
Lepsa in North-central Asia. 
Distribution. Central Europe, Spain, Italy, South Russia, Asia Minor, 
Syria, Armenia, Persia, Amurland, Central Asia, Western China. 
Genus THANAOS. 
riianaos, Boisduval, Icones, 240 (1832-33) ; Watson, Proc. Zool. Soc. Lond. 1893, 
p. 69. Type, tages, Linn. 
•' Autennse : club moderate, more or less bent into a curve, bluntly pointed. Palpi porrect : 
■second joint laxly clothed ; third joint almost concealed, bluntly conical. Fore wing: inner 
margin longer than outer margin ; male with a costal fold ; cell of fore wing less than two- 
thirds the length of costa ; discoceUulars slightly inwardly oblique, the lower the longer ; 
vein 3 shortly before the end of cell ; vein 2 slightly nearer to base of wing than to end of 
cell. Hind wing : outer margin evenly rounded ; vein 7 very close to end of cell ; disco- 
ceUulars and vein 5 faint ; vein 3 immediately before end of cell ; vein 2 almost equidistant 
from end of cell and base of wiug. Hind tibise fringed and with two pairs of spines, the 
upper pair minute. 
" This genus as it stands at present includes many species which are 
certainly not congeneric. The above description is taken from the type 
species. 
"Found in Europe and North America." [Watson, I. c.) 
Thanaos montanus. (Plate XLll. fig. 2, var.) 
Viiryus montanus, Bremer, Bull. Acad. Petr. ill. p. 473 (18G1) ; Lep. Ost-Sib. p. 31, 
pi. ii. fig. 4 (1864J. 
Nisoniades montanus, Pryer, Rhop. Xilion. p. 35, pi. x. fig. 23 (1S89). 
Thanaos rusticanus, Butler, Journ. Linn. Soc., Zool. ix. p. 58 (1866). 
'■ Alse anticse supra grisescenti-olivaeeoe, maculi basali, fasciis duabus obliquis (interiore soepe 
interrupta et obsoleta, exteriore sinuato-dentata) lunulisque marginalibus, seriatim dispositis, 
oiivaceo-fuscis ; punotis margiuis anterioris tribus albidis ; posticiE nigro-fuscK lunula vcl 
striga media, maoulis seriei externse flexuosse serieique marginalis flavis. 
" Aloe anticse subtus nigro-fuscas, seriebus macularum flavarum tribus ; posticse subtus sieut supra. 
34-37 m." {Bremer, I. c.) 
* " Alls supra ct subtus dilutioribus, maeulis uiinoribus." (Gr.-Gr. Hor. Soc. Eut. lloss. 1S91, 
p. 459.) 
