438 W. Doherij—Oertain Lycianidne from Lower Tenasserim [No. 5, 



nearly as obvious as in P. horsfieldii, but is composed of slender, crescent- 

 shaped markings, beyond wbich is a submarginal line of blaokisb dots, 

 of which the snb.apioal ones on the forewiug, situated in the brown 

 area, are touched outwardly with white. 



In the male the forewing is longer and more acute thau in P. hors- 

 fieldii, its outer margin but little curved, while in the female its upper por- 

 tion is strongly convex. In the hindwing the degree of marginal undu- 

 lation varies greatly, as is also the case with Iwrsfieldii. The female is 

 paler than the male and while flying has almost the air of a white 

 butterfly. 



The prehonsores obviously differ from those of liorsfieldii, the tips of 

 the unci (.tegnmina) being rounded and but slightly oblique, while in 

 P. IwrsfieUiittiej are very oblique and regularly tapering. As seen from 

 the side, the clasps (harpagones) end in two processes separated by a 

 deep sinus, the upper longest, and ending in a strong hook directed 

 upwards. In P. liorsfieldii the upper process is obsolescent, represented 

 only by an angle in the upper contour of the other. 



The types are from the Tenasserim Valley, east of Tavoy, Burma. 

 I have also taken it in the Ohittagong Hill Tracts. An apparently 

 identical form occurs in the Malay Peninsula and South-Eastern Borneo, 

 but I have no specimens now available for compa^^son. 



The venation of this species is interesting. The origin of the third 

 subcostal vein is immediately beyond the end of the cell, so that, as in 

 Pamgerydits liorsfieldii, there is no upper discocollular vein. In the 

 male,' the second and third subcostal veins are remarkably approximate 

 throughout, and the bifurcation of the latter is nearer the end of the 

 cell than the apex of the wing. In this it resembles Allotinus alhamali. 



102. Gertdus ancon, n. sp., PI. XXIII, Fig. 8. 



Male, above, forewing with the apex and outer margin black, and 

 the base '(as well as the hindwing) dull fiiscous leaving about two-fifths 

 of its area pure white. A white band extends obli(iuely from the costa 

 one-fourth from the base, widening to the middle median vein two- 

 thirds from the base, where it touches another white area extending 

 from the middle median vein to the hind margin, of which it occupies the 

 middle two-thirds, filling likewise nearly two-thirds of the interno- 

 median space, and extending, except at its excised lower augle,^ within 

 one-eighth of the outer margin, leaving the basal third of the intcrno- 

 median space fuscous, and almost enclosing, with the superior band, an 

 elongate black area occupying the basal part of the lower median space 

 and "'united with the fuscous basal area. The upper median vein 

 is swollen whore it crosses the white band, from just beyond its origin 

 one-fourth towards its termination. Bcloiv light rufous bi-own, the 



