84 



MR. S. A. NEAVE ON BUTTERFLIES 



"Jan. 18, 



toward anal angle ; palpi dusky above, white below ; thorax above 

 and base of abdomen covered with greenish-yellow hairs. 



Average length of primary 17 mm. 



P. robustus with its large size, stout thorax and elongate wings, 

 differs from both moritili and neba, which seem to be its nearest 

 allies, though perhaps, with its striking underside, it is more 

 closely related to the latter. 



Type <5 in the British Museum, from the Chambezi valley, 

 7.V.08. 



Type $ in the British Museum, from the high plateau, south 

 of Lake Tanganyika, 22.viii.08. 



Cotypes in the Hope Coll., Oxford. 



Described from 55 individuals. 



I found this large Platylesches to be a common one, especially 

 in high plateau country. It usually frequents grasses, etc., in or 

 on the outskirts of woodland. It has also been taken sparingly 

 in Mashonaland by Mr. G. A. K. Marshall. 



Platylesches picanini. 



Platylesches picanini Holl. Ent. News, v. p. 91, pi. iii. fig. 9 

 (1894). 



Represented by two individuals from the Alala plateau north- 

 east of Broken Hill, and by two others from east of Lake 

 Bangweolo, x. They both differ somewhat from typical specimens 

 in having the yellow band across the secondaries considerably 

 broader. 



Platylesches lamba, sp. n. (Plate III. fig. 6, S ■) 



Allied to picanini Holl., but a slightly larger insect, the band 

 across the underside of secondaries being broader, pure white, and 

 not interrupted toward inner margin as in that species. 



d . Upperside. — Primaries dusky with a greenish iridescence, 

 with the following hyaline markings : — two streaks in cell near its 

 end, the lower much the larger ; three small discal spots in areas 

 7, 4, 3, the last the most proximally placed ; a large irregular spot 

 in area 2 below cell-end ; a creamy-white spot on vein 1 a little 

 before middle. 



Secondaries. Ground-colour as primaries ; a row of three golden 

 spots (the first very small) below cell-end in areas 4, 3, 2, followed 

 by a larger, more indefinite dull yellow spot in area 1 c. 



Underside. — Primaries. Ground-colour as uppersidebut lacking 

 iridescence ; a narrow line of yellow on costa near base and a well- 

 marked long white streak about middle in area 1 b. 



Secondaries. A broad creamy-white discal band from costa to 

 inner margin. No break in areas 1 b, 1 c as in picanini. 



Fringe dusky, paler towards anal angle ; palpi creamy white ; 

 thorax and base of abdomen above covered with iridescent greenish 

 hairs. 



Length of primary 1 6 ram. 



