106 ME. G. T. BETHUNE-BAKEE : A EEVISION OF THE 



specimens is different, the colour being very uniform darkish ochreous brown with the 

 pattern more spotted in appearance. I have about thirty specimens, more or less 

 typical, before me, in addition to which I have about a dozen connecting them with 

 eumolplms Cramer, almost as closely as in the preceding instance, and one or two of the 

 latter approaching the grey colour of the underside of farquhari Distant : the connecting- 

 specimens are from Java, Palawan, New Guinea, Borneo, and one from Darjeeling ; the 

 typical specimens before me being from Sumatra, Borneo (S.E.), and New Guinea. 

 I have not yet seen a typical eumolphm from the Malay Islands, but I have a 

 link very close indeed to farquhari Distant from Darjeeling. Under these circum- 

 stances, and considering the fact that I can trace no difference whatever in the 

 genitalia, I am forced to the conclusion that these three names represent one variable 

 species, the female of which may be occasionally dimorphic, as in other species of this 

 green group, for I have one or two very pale azure females which might be claimed by 

 each of the authors as the female of his insect. De Niceville pointed out (Butt. India, 

 vol. iii. p. 265) that maxwelli Distant was probably the female of farquhari Distant; 

 and he is no doubt quite correct in this, for if we compare the underside of the 

 figures of the two insects, they will be found to agree precisely. I have mounted in 

 balsam several genitalia of each of the named varieties, and find they all agree 

 precisely, and in this genus I consider this potent evidence that all are but one 

 species. It is most probable that these very highly metallic-green colours and other 

 such-like hues are a comparatively recent development, and we shall therefore not 

 expect to find the female of a similar colour. I have no doubt, as de Niceville has 

 already pointed out, that the supposed female described by Horsfield is no other than 

 Pagenstecher's more recently described horsfieldi. 



The genitalia of this green group are very specialised, but all follow the same main 

 lines : the tegumen is much less ample and distinctly angled where it resolves itself 

 into its arm-like supports ; the hooks are sharply bent at their muscular attachment 

 inside the tegumen, whence they project horizontally in a slight curve ; the clasps are 

 bilobed, the upper lobe being anvil-shaped, the upper fore extremity being sharply 

 pointed and very highly excavated internally, whence it is projected into the long 

 finger-shaped lower lobe, which has an upward curve. The penis is very long, with a 

 contrary angle fore and aft, with a large trumpet-shaped orifice much expanded on its 

 outer lip. 



Aehopala aurea (Hewitson). 



Amblypodia aurea Hewitson, Cat. Lycamidaj B.M. p. 8, pi. viii. rigs. 87 & 88 (1862) ; id. 111. 



Drum. Lep., Lye. p. 9 (1863). 

 Arhopala aurea Druce, Proc. Zool. Soc. Lond. 1895, p. 591. 



Hah. Borneo (Sarawak, Labuan, Tameang-Lajang) ; Sapagaya. 

 Expanse, d , about 45 mm. 



