b THE ENTOMOLOGIST 8 BEOORD. 



side of the nervure) in populata ; it extends from the nervure to the 

 inner margin, and its length is rather greater than its breadth ; by 

 measure it begins 2-mm. from the base of the wing and extends along 

 the inner margin for 2-mm. The hairs do not proceed radially from 

 the base, as in populata, but form a fringe or flat brush which lies 

 closely appressed to the under surface of the wing, passing in a direction 

 parallel with the costa ; they are about 3-mm. in length, and are pale at 

 their bases but become nearly black at their tips, where they are a 

 little expanded and flattened, and end in a sharp lancet-shaped point. 



Associated with this brush is another and more distinctive feature 

 that is not represented in any way in the other species of Eustroma, 

 Hb., Meyr., which I have examined. When the brushes are pushed 

 aside and the under surface of the fore- wing, which they cover, is thus 

 exposed, a circular patch of about 1-5-mm. in diameter is seen, lying 

 between lb and 2 ; this patch forms an opaque orange mark, very 

 different from the strawy-fuscous colour and semi-transjjarent texture 

 of the rest of the under surface. At a point on the upper surface of 

 the hind- wing, that is exactly opjiosite this when the wings are partially 

 extended is an almost identical patch ; this is circular, about I'Ji-mm. 

 in diameter, and its centre is about at the centre of the transverse 

 nervure terminating the discoidal cell ; it is orange in colour, but at its 

 very centre is decidedly darker and denser. 



These patches, when placed under the microscope (dried specimens 

 be it understood), present scales of a long ovoid or fusiform shape which 

 look as if they were not flat, but solid ; these are perhaps a trifle shorter 

 than the surrounding scales, which latter have square ends and from 

 six to eight terminal teeth and are nearly twice the breadth of those 

 on the yellow patches. These broader scales are striated longitudinally; 

 those on the patches, however, are of a netted granular texture, 

 suggestive rather of contents than of surface markings, and many of 

 them are loaded with black material which is probably air unexpelled 

 by the medium of preparation. 



These two patches (of androconia ?) then are opjDOsite each other, 

 with the brush-fan lying between them ; if they are the real scent- 

 organs, we may suppose the brush to be of use in keeping them 

 sufficiently apart to ensure the passing over them of a current of air. 



]\[otes ori Dp. Bucl^ell's Paper on Glassificatioii. 



By W. F. KIRBY, F.L.S., F.E.S., 



Assistant in Zool. Dept., Brit. Mus. (Nat. Hist.), South Kensington. 



Linne appears to have been guided largely by size and general 

 appearance in the arrangement of his groups, as he placed many 

 Nymphalids (e.g. Morpho) among his Eqidtes, and certain Papilionids 

 among his Nymphales. Such errors, of course, were unavoidable in the 

 infancy of Entomology. 



Fabricius treated the Danai candidi and the Danai festivi as two 

 gi'oups, and restricted the name Danai to the Whites ; Danaus was 

 subsequently used by Esper almost in a generic sense. Unless we 

 hold that Ave must have male mythological names to agree with the 

 masculine Daaans, which would be most convenient on the score of 

 expediency, we should probably have to recognise brassiae as the type 

 of Danaus, 



