142 fJ""«'' 



Forest ; all quite black. Mr. Sharp explaining his exhibit said that in his opinion 

 tiiese dark forms were racial, and represented the survival of an older race, tind that 

 the melanism was not due to protective necessities, derived fi-oni the environment of 

 the localities in which the several species existed. Mr. H. Rowland- Brown, a series 

 of Pier'm manni, Mayer, from Vernet, Pyrenees-Orientales, given him by M. Rene' 

 Oberthiir, and called attention to the superficial differences which presented them- 

 selves when compared with imagines of P. rap;'?.. Mr. E. C. Bedwell, a series 

 of Cas.'iida fa.stuo.ta taken by him on Boshill. Surrey, mostly from the leaves of 

 young foxgloves. Dr. Gr. B. Longstaff, a series of thirty-three specimens of Danaida 

 chry.sippus taken by him in Egypt and the Sudan dnring January and February, 

 1909. Two taken at Cairo, one at Komombo, and one at Aswan were all typical, 

 but somewhat dark. .At Khartum, where the butterfly was fairly common, twenty- 

 five specimens were taken : of these two miglit be described as typical, though 

 lighter than the more northern specimens; in eight ttie veins near the middle of 

 the hind-wings were dusted with white scales ; in seven the centre of the hind- 

 wings was more or less white, as in Moore's alcippoides ; while seven might be 

 described as typical afcippus, Cram. One specimen only was seen of the form 

 dorippus, Klug, and this had the hind-wings almost entirely white — f. a/b/nit.<i, 

 Lanz. So far as could be estimated in the field, tiiree-fourths of the specimens 

 seen at Khartum were either alcippun or al.cippoiden. On the White Nile between 

 El Duem and Gebel En (lat. 14° — 1.^° N.) four specimens were taken, three typical 

 or nearly so, one of the alcippun form. These figures are in marked contrast to the 

 proportions found by the President* among Mr. Loat's captures on the White Nile 

 in lat. 11°— 4|° N. Mr. T. Bainbrigge Fletcher, two Oriental mimics of Z>. chrij- 

 sippns ; the 9 $ of Ehfmnia.'i undulari.i and of Argynnis hi/perliu.s [niphe), whose 



$ t? in both cases show the ordinary coloration of the genera to which they belong. 

 He said that although in the ordinary preserved condition tlie resemblance of these 

 two ? ? was by no means compai-able to the close imitation of pattern seen in the 



$ of Htipolimnas (also exhibited), yet under natural conditions of flight the like- 

 ness between model and mimic was exceedingly close and deceptive. Mr. Fletcher 

 also exhibited specimens of a large and conspicuous .Mydaid fly, Myda.s ruficornis, 

 Wied., which show a striking resemblance when on the wing to the large and 

 powerfully armed Scoliid wasps so common throughout Ceylon ; a red spider, taken 

 at Galle, on a " bilimbi " tree (Averrhoa hilimbi), up the trunk of which members 

 of the common leaf-nesting red ant, (Ecophylla smaragdina — a model for several 

 different insects and spiders — were running ; some newly hatched Mantids closely 

 resembling in colour and movements the common leaf-nest ant, (Ecophylla smarag- 

 dina ; examples of a small Pyralid moth, Syngamia Jloridalis. When flying, the 

 black margin of the wings are practically invisible and the moth looks exactly 

 like a Coccinellid beetle ; and a yellow-spotted Reduviid bug, Acanthaspis quhi- 

 quespinosa, Fab., an interesting case of warning coloration common to various 

 Carabid beetles found in the same locality and situations (under logs, &e.). — 

 H. EoyyijAND-BEOWN, Hon. Secretary. 



Trans. Ent. Soc. Lond., 1903, p. 141. 



