-580 



HESPEEIID.E. 



of //. alveiis which also agree with them. M. Gmm-Grshimailo has 

 described this form as ^Pyrgus ' alveus, var. sif aniens *. 



Graeser met with the species commonly at Pokrofka in June, and 

 Staudinger 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. 



Thanaos, Boisduval, Icones, 240 (1832-33) ; Watson, Proc. Zool. Soc. Load. 1893, 

 p. 69. Type, tages, Linn. 



"Antennae: club moderate, more or less bout into a curve, bluntly pointed. Palpi porrect : 

 second joint laxly clothed ; third joiut almost concealed, bluntly conical. Fore wing : inner 

 margin longer than outer margin; male with a costal fold; cell of fore wing loss than two- 

 thirds the length of costa; discocellulars 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- 

 cellulars and vein 5 faint; vein 3 immediately before end of cell ; vein 2 almost equidistant 

 from end of cell and base of wing. Hind tibise fringed and with two pairs of spines, the 

 upper pair minute. 



" This genus as it stands at present includes many species whicli are 

 certainly not congeneric. The above description is taken from the type 

 species. 



" Found in Europe and North America." ( Watson, I. c.) 



Thanaos montaims. (Plate XLII. fig. 2, var.) 



Pijrgus montanus, Bremer, Bull. Acad. Pctr. iii. j). 173 (18(51) ; Lep. Ost-Sib. p. 31, 



pi. ii. fig. 4 (18(Jlj. 

 Xisoniades montanus, Prycr, Bliop. Nihon. p. 35, pi. x. fig. 23 (IHHD). 

 'I'liamtoH rmticanns, Butler, Jouru. Linn. Soc., Zool. ix. p. 58 (18()(i). 



'• Ahe antica' sujira giMscBcotili-olivaeeoc, maculi l)a.sali, fasciis duabus obli(iuis (interiore s:epo 

 iiiterruj)ta et obsoleta, exteriore siiuiato-dentala) lunulis(]U(; niarginalibus, seriatim dispositis, 

 oiivaceo-fuscis ; punctis marginis anterioris Iribus albidis ; postica; nigro-fusc;e lunula vel 

 striga media, maculis soriei cxlcrnaB flcxuossD serieiquc marginalis flavis. 



" Alac antic;c siibtus nigro-fuaco), 8cri('l)UH macularuin flavaruni trilius; jioslicte subtus sicut sujjra. 

 34-37 m." {Bremer, I.e.) 



* " Alis supra ct subtus dilutioriltus, maculis minoribus." ((jlr.-tJr. Jlor. iSoc. Knt. lloss. 1891, 

 p. 150.) 



