1913]. - 205 



outline. Forewing with the blue bars in the cell indistinct ; subapical dark 

 ochreous band extending- from vein 7 to near the middle of interspace 2, angled 

 outwardly at vein 5 and bearing blackisli streaks upon it between the veins in 

 the middle of interspaces 3 and 4 ; triangular patch on the middle of the inner 

 margin bine, or greenish-blue, reaching to middle of interspace 2, and leaving- a 

 larger black area at the bases of the interspaces and a broader black outer 

 marginal band than in the male. Hindwing bhxe, or greenish-blue, with a 

 broad black or indigo marginal band; a large pale blue or pale yellow patch 

 upon the disc beyond the cell from vein 3 to above vein 7 ; two rounded black 

 spots in the middle of the cell and a divided black mark on the discocellulars. 

 Underside of both sexes g-reenish, suffused with dusky scales on the outer 

 areas ; the subapical and discal areas appearing as ochreous suft"usions ; cell of 

 the forewing with a subbasal dark spot followed by two black ring marks 

 placed one above the other, and an irregularly shaped ring spot on the disco- 

 cellulars ; hindwing with two dark ring spots in the middle of the cell and a 

 divided dark mark on the discocellulars. 



Both sexes may have the colour scales on the upper side steely-blvie or 

 greenish, but when the latter is found, it is never of the yellow or golden green 

 tint of the allied species. 



Expanse .- J , 74 mm. ? , 90 mm. 



Habitat : Ashanti ; Grold Coast. The types are in coll. Dudgeon, 

 but co-types are being presented to the British Museum collection. 



" Honeyden," 



North Cray, Kent : *" 



July 29th, 1913. 



ON SEMI-APTEROUS FEMALES IN LEPIDOPTERA. 

 BY G. V. HUDSON, P.E.S. 



I have to thank the readers of the Entomologist's Monthly 

 Magazine for the kindly interest they have taken in my paper on the 

 above subject, and desire now to offer a few supplementary remarks 

 on the subsequent communications which have appeared. 



Dr. Chapman's explanation is in agreement with mine in that 

 both affirm that the apterous or semi-apterous condition of the female 

 has been acquired to keep the female on its food-plant, or in the case 

 of the Psychids, Orgyias, Arctiids, &c., on its cocoon. The latter 

 explanation, which is wholly due to Dr. Chapman, is, I think, a true 

 one, and really assists my theory, as it is precisely those species which 

 deposit their eggs on the cocoon which do not appear in winter (^Meta- 

 crias, CEceticus, Orophora, Scoriodyta, &c., in New Zealand, and 

 Orgyia, &c., in England). The remaining semi-apterous female 



