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Show 618 MR. H. J. ELWES ON BUTTERFLIES FROM [Dec. 6, It does not appear to me to be sufficiently distinct to be described from a single specimen, and the band is not appreciably broader than in G. biggsii (gopara), as Doherty says it is. Judging from the figure, it is also very close to Miletus melanion, Feld., from Luzon. GERYDUS CROTON. Gerydus croton, Doh. J. A. S. B. lviii. pt. ii. p. 439, t. xxiii. 9 ; Butt. Ind. iii. p. 25. Four males and two females from Thandaung in East Pegu at 4000 feet elevation. The type was from the Tenasserim valley. The plate does not agree with the underside of my specimens (named by Doherty), which are of a more rusty colour and have broken markings on the hind wing. It seems, however, a very distinct species. GERYDUS IRRORATUS, Druce, var. ASSAMENSIS. Gerydus irroratus, var. assamensis, Doh. J. A. S. B. Ix. pt. ii. no. 1, p. 37, t. 1.7 3 • The type of this is from the Dhansiri valley in Assam, and a female from Perak is marked by Doherty with a'!. This species seems identical with one of which I have several pairs from Pulo Laut, and differs from all tbe preceding in having a pale sexual patch in the cell of the fore wing of the male as in Parayerydus horsfieldi. GERYDUS BOISDUVALI. Miletus boisduvali, Moore, Cat. E. I. C. p. 19, t. 1 a. fig. 1 2 (1857). Gerydus boisduvali, Butt. Ind. iii. p. 24. Specimens from Margharita agree with those from Sikkim and from the Shan Hills. I have one pair from Sikkim which differ considerably in the colour and pattern of the underside, having a dark transverse band on the hind wing below, and also in having the tuft of bristles at the base of the anal claspers in the male black instead of grey. If these differences should prove to be constant, it seems to me that it could be separated specifically; but the group is a very difficult one and the anatomy requires more study than I am now able to give it. PARAGERYDUS HORSFIELDI. Miletus horsfieldi, Moore, Cat. E. I. C. p. 19, t. 1 a. fig. 2 3 (1857). Parayerydus horsfieldi, Butt. Ind. iii. p. 26 ; Doh. J. A. S. B. 1889, pt. ii. p. 437. Specimens from East Pegu, Momeit, and Perak agree with others from Sumatra and Pulo Laut. I have another form from Perak which is smaller and differs in the colour of the underside, |