7 



abdominal corners, running parallel with the external edges. Anterior wings with two small blue spots 

 placed on each near the tips, and another, larger, divided into three by the nerves, near the midcUe of 

 the anterior edge ; being placed at the top and even with the bar, but divided from it by a small separa- 

 tion of black. The edges of these wings are entire. Posterior wings with six blue spots on each, placed 

 along the external edges ; the four lower ones being in pairs, and another small one at the abdominal 

 corners ; margins deeply angulated. 



Under Side. Breast and sides dark brown, spotted with white. Abdomen brown. Wings dark 

 brown hair-coloured, immaculate, except the posterior ones, which have a row of eleven cream-coloured 

 spots running along the external edges. 



The female diflfers from the male in being somewhat larger in size, with the spots on 

 the upper side of a brighter green colour, and with the marginal row of spots on the under 

 side of the posterior wings of a pearly greyish hue, and with a tinge of this colour upon 

 the disk of the wings. Cramer has figured the male as the female, and vice versa. Mr. 

 Smeathmaii informed Mr. Drury that this insect feeds upon the orange and lime trees, 

 about ivhich the butterfly is always seen flying, considering it as remarkable that most 

 of the insects which feed upon the orange or citron tribes, have some tinge of green upon 

 them ; in like manner the beautiful green snake, so common about Sierra Leone, is always 

 to be found about these kind of trees. These circumstances led our author into a series 

 of observations which, though upwards of half a century old, may still be read not only 

 with pleasiu'e, but with the hope of beneficial results. 



" The particular qualities, dispositions, and uses of by far the greater part of insects, 

 as well as of plants, are at present totally unknown to us, nor are the methods by which we 

 are to acquire that knowledge at present ascertained. 



" Their colours have hitherto been of no further use to us than merely to discriminate 

 one genus or species from another ; and yet it is possible that, by a combination of obser- 

 vations even on the colours of insects, we may form some ideas of their natures and pro- 

 perties. 



" The observation of Mr. Smeathman, if well founded, supposing it did not lead to a 

 discovery of the nature and properties of an insect itself, might at least indicate those of 

 the plant on which it feeds. The various species of the Danai CancUdi, among which are 

 included the diff'erent white butterflies of Europe, feed chiefly on such plants as are 

 reckoned not only nourishing, but salutary to the human body, such as the various species 

 of cabbages, coleworts, turnips, &c. Every foreign country produces butterflies of that 

 family ; some of them so very like those of Europe, that it is a fair inference they feed on 

 plants of a similar property. This is countenanced by many corroborating circumstances. 

 The Papilio Iris, and the various Fritlllary butterflies fly exceedingly swift ; and it appears 

 from Mr. Smeathman's observations, that foreign butterflies that bear a resemblance to them, 

 also flv exceedingly swift. The gfreen and colden Scarabei of this countrv are found to 

 delight in flowers ; those of the hot climates are also found on flowers ; while the black, 



