72 LEPIDOPTERA INDICA. 



Gcograjjldcal Distribution of the (S^jee /<■«. 



One specimen from India. 



1. G. hamiltoni, de Niceville, Journ. Asiat. Soc. Bengal, 1888 (Khasia Hills). 



Remarks. — G. hamiltoni has such peculiar characters that it cannot be placed in the genus 

 Celsenorrhintis nor Salnnipa. We have separated it, gi'i'ing the most prominent characters, for the only 

 example which we possess of this very rare species is in but poor condition. (Mabille.) 



Note. — Mabille gives an imperfect reference and a wrong locality, unless he means that his specimen, 

 came from the Khasia Hills, which is very probable. de Niceville's type is said to have come from 

 8ylhet, from the Rev. Walter A. Hamilton, but there are many specimens from the outer parts of the 

 Khasia Hills in various collections marked Sylhet. Mabille's diagnosis, such as it is, evidently refers 

 to de Niceville's hamiltoni, de Niceville put it into the genus Coladenia tentatively and with great 

 doubt. 



GEROSIS HAMILTONI. 

 Plate 775, figs. 2, (J , 2a, (J . 



Coladenia hamiltoni, de Niceville, Journ. As. Soc. Bengal, 1888, p. 291, pi. 13, fig. 8, ^. Watson, 

 Hesp. Ind. p. 121 (1891); id. Journ. Bo. Nat. Hist. Soc. is. 1895, p. 422. Elwes and Edwards, 

 Trans. Zool. Soc. 1897, p. 128. 



Gerosis hamiltoni, Mabille, Wytsmann, Gen. xvii. p. 49 (1893). 



Imago. — ]\Iale. Upperside. Forcwing olive-greenish fu.scous, with two very 

 irregular broad discal black fasciae joined in the middle ; three mo.st minute transparent 

 sub-apical dots, the uppermost the largest, placed at the outer edge of the anterior 

 portion of the outer black fascia, a very minute similar spot in the second median inter- 

 space, a very attenuated spot across the middle of the first median interspace, both 

 placed on the outer black fascia ; the inner margin somewhat broadly irrorated with 

 greyish scales ; a sub-marginal indistinct broad blacki.sh fascia. liindwing, ground 

 colour much as in the forewing, but the outer third of the wing irrorated with grey 

 scales, a recurved black macular decreasing band from the costa near the apex of the 

 wing to the second median nervule ; the discocellular nervules defined by a pale line. 

 Underside, both wings vinous-fuscous. Foreicing with the transparent spots as above. 

 liindwing with the disc irrorated with whitish ; the macular black band much as above ; 

 an anteciliary whitish line. Cilia fuscous. The Rev. Walter A. Hamilton, after whom 

 I have much pleasure in naming it, obtained a single specimen in Sylhet in the spring. 

 It is quite unlike any species known to me, and I place it in the genus Coladenia only 

 because it agrees in outline with C. tissa, Moore, (de Niceville.) 



Expanse of wings, $ ly% inches. 



Habitat. — Sylhet, As.«am. 



The type is in the Indian Museum, Calcutta ; ]Mal.)ille records it from the Khasia 

 Hills ; it is not in the B. M. We give copies of de Niceville's figure. 



