HEMARIDI. 



507 



II. 



III. 



Wings scaled throughout. 



A. Forewings yellowish olive -grey, lighter exteriorly Croatica, Esp. 

 Wings to a great extent scaled, only behind the 

 middle with a narrow transparent -band, which is 

 divided into single spots by the nervure.s which 

 traverse it. Forewing with the scales greenish- 

 olive in colour, with a broad dark brown outer band. 

 Hindwing predominantly red-brown in colour . . Ducalis, Stgr. 



Wings to a great extent transparent. 

 A. Median cell of forewing longitudinally divided by 

 a dark fold which appears as a continuation of 

 nervure 5. 



a. Outer margin of the wings brown, 

 a. In the scaled inner marginal part of the 

 hindwing no transparent cell is present. 



B. 



Base of forewing and inner marginal 

 part of hindwing with the scales 

 yellowish or greenish olive-colour . . 

 2. The base of forewing and inner mar- 

 ginal part of hindwing with the scales 

 brown-red, scarcely greenish haired. . 

 b. Inner marginal part of hindwing with a small 

 oblong transparent-spot, which is very finely 

 divided by the intersecting nervure . . 

 b. Outer band of the wings blackish, not 

 brown. 



a. Outer band interiorly cut off almost straight, 

 hence does not project in t'.ie for n of rays 



b. Outer band sends out towards the base long 

 actiniform teeth. 



1. Base and inner marginal part of 

 hindwing blackish 



2 . Base and inner marginal part of hind- 

 wing gold-yellow 



The median cell of forewing not divided by dark fold 



Bombyliformis, O. 



Beresowskii, Alph. 



Ganssuensis, Grum. 



Ajjinis, Brem. 



Alter nata, Butl. 



Radians, Walk. 

 Fuciformis, O. 

 (nee L.J. 



Jordan says (in litt.) that the American species are different from the 

 Palaearctic, but all belong to the same genus, and that the remark- 

 able seasonal variation of some species has misled entomologists into 

 describing more species than are distinct. Smyth has shown (Ent. 

 News, xi., pp. 584 et seq.) that Hemaris tenuis and H. diffinis are 

 seasonal forms of one species, their relation being the same 

 as that already proven in the case of H. rujicaudis and H. 

 thysbe. In the first case tenuis is the spring form from wintering 

 pupae, and diffinis the summer form from eggs of tenuis. He 

 proved that eggs laid in captivity by a 2 diffinis in August 

 disclosed tenuis the following May, and from eggs laid by a 

 tenuis £ in June, diffinis in various varietal (as well as the 

 typical) forms was disclosed the same summer in July. Further 

 proof is given by Smyth (loc. cit., xiii., p. 82). Here he states 

 that some 18 summer pupae did not disclose imagines of diffinis 

 in the autumn, that these emerged in the spring, when 13 were 

 of the spring form, 3 were very nearly of this form, whilst 2 showed 

 a distinct approach to the summer form. 



Meyrick treats our tribe as a single genus, Hemaris, and notes 

 it as " a moderate genus, distributed throughout the northern 

 hemisphere, but mainly American and Asiatic. Imago day-flying, 

 feeding on the wing ; immediately after emergence the wings are 

 furnished with very fugitive scales." 



It may be here noted that Christy captured, on May 5th 



