MESAPIA; DAVIDINA; DELIAS. By J. Robek. 43 



M. larraldei Oberth. (18 d). Very similar to loth, but the white marginal spots are replaced by lanaldei. 

 submarginal ones, the underside also being very different in consequence of the greater extension of the 

 black colour, which renders the arrow-spots indistinct. Very dark specimens, in which the i)lack-brown 

 colour is prevalent, are named var. melania by Oberthlik, who believes that this form is restricted to melania. 

 certain localities near Ta-tsien-lu; however, it occurs also at Pa-tse-fang. Another form of this species 

 — ah. )nit(nis Obertli. — occurs outside the Palaearctic Region (in Yunnan). 



M. paracraea Xicev., from West China (Tse-kou), is obviously a local form of latrahhi The white paracraea. 

 colour is still more reduced on the inner marginal area of the upperside of the hindwing than in melanio, 

 but the forewing has, above, a complete row of white submarginal spots, there being moreover a white 

 discal wedge-spot between the 2. and 3. median branches. The yellow markings of the underside are more 

 deeply coloured and the dark arrow-spots extend almost to the outer margin, being all well developed also 

 on the forewing. The butterfly bears a great likeness to oherthuri in all its markings, but the colour of 

 the light parts of the underside is very different, agreeing more with that of larraldei. 



M. goutelli Oberth. (18 e). All the veins as well as the submarginal arrow-spots situated in the goutelli. 

 marginal cells are black, these spots being well developed; in ? the whole forewing shaded with black. — 

 In West China; according to Leech the cf very plentiful, the ? however very rare. 



3. Genus: Hesapia Grati. 



In neuration there is no difference from the previous genera, but the wmgs have a peculiar rounded 

 shape and the palpus and thorax are strong!}' shaggj-. This insect is like the species of Balfia an inhabitant 

 of high altitudes (15 — 18000 feet). Only one species. 



M. peloria Hen: (18a o", 19b ?). The cT above white with a yellowish flush, the distal margin />c/or/a. 

 being almost completely transparent; hindwing beneath ferruginous yellow on the inner area, the veins 

 being broadly black. In ? the upperside of the forewing and the underside of the hindwing yellow, with 

 broadly black veins, the upperside of the hind^^^ng being yellowish white with black marginal wedge- 

 spots. — Occurs in North-East Tibet (Kuku-Nor), being apparently rare. 



4. Genus: Davidiua oberth. . 



According to the figure given by Leech this butterfly has 5 subcostals, Oberthcr's figure showing 

 even 6 subcostals, this figure being doubtless incorrect. As we have no specimen of this very rare species 

 at our disposal, we are naturally unable to give correct details. According to Leech's figure the 3 discocellulars 

 are all well developed, while the upper one is absent from ObbrthOr's figure. These differences appear to 

 prove that the two authors had before them specimens of different species , the figures given by these 

 authors being so verj- distinct in appearance that it seems to me questionable if Leech's D. armandi 

 belongs to the species described by Oberthur. Both figures show a conspicuous forked fold in the cell of 

 both wings. 



D. armandi Obertli. (19b) is a medium-sized, white, faintly yellowish butterfly with dark veins and armandi. 

 short internervular streaks at the distal margin, tiie hindwing beneath being rather more deeply yellow in 

 the basal area. — OBERXHiJR's type was found on the highest point of the Pe-hoa-chow in North- 

 West China. 



For the reasons given above we are obliged to treat the butterfly figured by Leech as a separate 

 species, which we call alticola (19b cf). Whether it wifl be necessary to erect a separate genus for this alticola. 

 insect, we are not able to decide with certainty for lack of material. However, if the structural differences 

 above pointed out from the figures should turn out to actually exist, alticola would have to be placed into 

 a separate genus, for which we propose the name Leechia. The colour of alticola is dirty yellow above and 

 beneath , the upperside however being so strongly shaded with fuscous that there remain only yellowish 

 spots situated proximally in the marginal cells; the veins dark, the margin bearing, besides, short dark 

 internervular streaks above and below. The ? is lighter at the wing-margins. Antenna very short, being 

 only about half the length of the cell of forewing; palpus projecting far beyond head. — This species 

 occurs in Central China (Chang -Yang). 



.5. Genus: I>eliaH Hbu. 



The species of Delias differ from Pieri.-^ in the forewing having 3 instead of 4 sul)costals. Almost 

 aU the species are bright- coloured, mostly on the underside. The genus has, in the Palaearctic Region, 

 only one species and several local forms of Indian species. The erection of the genus I'iccarda Grote for 

 euchari.'i Dnirij and allies appears to us unnecessary, the more so as the distinguishing characters given are 



