THECLA. 



359 



Strymon fentom, Butler. — " Nearly allied to S. iv-album of Europe, but quite as large as ^S*. spini ; 

 wnder surface like the latter species in tint, but with almost the pattern of -S. w-album ; the 

 discal line of the primaries, however, is more arched and continuous, that of the secondaries 

 is more transverse, and therefore does not run inwards in the direction of the base: the 

 submarginal spots are more dome-shaped, of a bright orange instead of red colour ; and there 

 is a distinct submarginal white line. Expanse of wings 1 inch 5 lines. 



" Shiribetsu, Hokkaido [Yesso], August. Coll. M. Fenton." (Butler, I. c.) 



I am indebted to Mr. Janson for the loan of one of M. Fenton's original 

 specimens of Butler's fentoni. li is rather larger than the examples of 

 T. lu-album from Yesso in Fryer's collection, but not so large as some of my 

 European specimens. I cannot find any character by which fentoni, Butler, 

 may be separated, even as a local race, from iv-alhum. 



Elwes (Froc. Zool. Soc. Loud. 1881, p. 886) states that W. B. Fryer found 

 T. iv-album at Shanghai * and Bremer at Fekin. 



Distribution. Central and South Europe, Siberia, Amurland, Japan. 



Thecla patrius. (Flate XXIX. fig. 11, .) 



Thecla patrius, Leech, Entomologist, xxiv., Suppl. p. 58 (June 1891). 



Eesembles T. w-alhum from Europe, but in the males the sexual mark is oval in shape and the 

 tails are longer. The principal distinctions, however, are found in the markings of the under 

 surface, where the transverse lines are more oblique ; that on the secondaries starts from 

 beyond the middle of costa ; the orange band is broader, and is followed by two large velvety 

 black spots ; the orange band is preceded and followed by a metallic bluish line ; the 

 primaries have a pale submarginal line, which in the male merges into orange towards inner 

 angle. 



Expanse 33 millim. 



A large number of specimens, including both sexes, from Fu-tsu-fong, taken 

 at an elevation of about 10,000 feet in June and July. 



Thecla eximia. (Flate XXIX. figs, l c?, 2, 3, var.) 



Thecla w-album, var. eximia, Fixsen, Rom. sur Lep. iii. p. 271, pi. xiii. fig. 2 fl887). 

 Thecla affinis, Staudinger, op. cit. vi. p. 14'8 (1892). 



Male. Euliginous brown. Primaries have a large well-defined glandular patch agreeing in shape 

 better with that of T. spini than T. w-alhum. Secondaries as in T. w-album, but the tails 

 are longer and the reddish patch on anal lobe is brighter and larger. Fringes are white, but 

 in some specimens suffused with dusky. Under surface olivaceous grey : primaries traversed 



* I have seen Fryer's Shanghai specimens in Mr. Elwes's collection and find that they are male 

 examples of T. eximia, Fixsen (= affinis, Staudinger). The specimens recorded by Bremer from 

 Pekin are probably also referable to that species. 



3b 2 



