1830. J W. Dohertj—Oertaiii LyorenidiB from Loiver Teiiasserim. 423 



Tht'cla Qrowp. 



23. Appoeasa atkinsonii, Hew. 



The genus and tlie species were both, I believe, founded on a single 

 specimen of uncertain sex and with the tails broken ofE. I took one 

 male and two females near Myifcta, having spatulate tails much like 

 those of Mahathala. Thoy differed from that genus in the less aouminato 

 apex of the hindwing, in the egg (which was covered with triangles and 

 tubercles instead of quadrangles and spines, a difference apparently of 

 small importance in these butterflies), and in the more undulate margin 

 of the hindwing, which gives it a most peculiar appearance. But the 

 insect has, when sitting on a tree-trunk, a marvellous resemblance to a 

 patch of lichen, and the irregular outline adds to this effect. Mimicry 

 of this sort is a sign of great flexibility of structure and such genera 

 must be Judged by severer canons than others ; so that it is doubtful 

 whether A^^porasa can stand. 



24. D ABA SANA peeimtita, Hew. 

 Mergui, Myitta. 



25. Plos apidanus. Cram. 



Mr. Distant makes no mention of the singular scarlet costal area 

 at the base of both wings below in this species, though they had long 

 ago been observed by Cramer and Godarfc. Thoy are occasionally 

 present, though much less marked, on the forewing of some of the 

 Himalayan species of this genus, as Mr. de NlciSville has shown mo. 



One female, Mergui. This species is the type of my genus Flos, 

 the life-history of which I hope to publish before long. I have taken it 

 in Eastern Java, and slightly different forms occur in the Celebes and 

 in the mountains of Sambawa. For a partial description of Flos, see 

 above. 



26. Flos abseus, Moore. 



Myitta, agreeing perfectly with Sikkim specimens. 



27. Flos aeteoal, n. sp., PI. XXIII, Fig. 5. 



Male, above, base azure, darkening outwardly to violaceous blue, 

 quite violet in some lights ; on the forewing the blue occupies less than 

 half of the surface, the black border reaching the upper angle of the 

 cell, and extending unusually far up the hind-margin. Hindwing with 

 a blue area from the costal and upper subcostal veins to the submedian, 

 its outer margin irregular, the black border wide. Below, forewing light 

 brown, the costal half glossed with violet, a large triangular violet- 

 whitish area (somewhat as in Mymnias) on the costa near the apex ; 

 three wide dark violet-brown transverse bands, edged with paler, one 

 in the cell; the second across its end, extendiug from the second 

 subcostal to the lower median ; the third oblique, unbroken, with straight 

 54 



