104 [May, 



patch of colour as on tlie fore Aving ; it reaches within two-thirds of length 

 of wing from base, gi-adually fading out. The underside markings show 

 thi'ough hind wings, not apparently due to wasting of specimen. Underside 

 white, with the usual Lycsenopsid markings ; a fine black marginal line, inside 

 white cilia (with dark points at end of veins) ; another line not so dark, and 

 curved a little between veins, more so on hind wings, runs parallel with outer 

 line about 1 mm. from it on fore wing ; rather more on hind wing. Between 

 these two lines a spot in each space, elongated on fore wing, more rounded and 

 darker, almost black, on hind wings. A discal line on each wing. The spots 

 in the usual post discal line are 6 on fore wing, elongated, 1st (from costa), 5th, 

 and 6th in line ; 2, 3, and 4 a little further out, and in echelon. The hind 

 wing has 4 basal spots : 1, 3, 4 in line, 2 further out. Of the post discal line, 

 2 is imder 1 ; 3, 4, and 5 nearer margin, and 4 oblique ; 6 further in ; 7 in line 

 with 3, 4, 5, dark and elongated ; 8 (or 8 and 9) smaller nearer base, in line 

 with 6. 



? . Larger than ^ , hind margin a little more rounded ; blue patch on fore 

 wing has its hind margin sloping basally, so as to meet hind margin at middle 

 instead of two-thirds as in <? . Underside has post discal row of spots beneath 

 fore wing nearly in line, and the antemarginal line is more regularly arched in 

 each space. One J specimen is in this respect mvich more like the ? than the 

 other. The head and body are dark above and white below, like wings ; 

 antennse black (?) narrowly ringed-white at joints. 



Exp. c? 26 mm. (and 21 mm.) ; ? 27 mm. 



2 cJ Mount Klingkang, 2,500 ft., Oct., 1911. 1 ? Pmiulmear, 

 Limbang, 5.6.1911, Sarawak — Moulton. Specimens now in B.M. 



I have named them after Mr. F. F. Boult, resident of the district 

 where the insect is found. 



The male appendages approach nearest to those| of (Lyaenopsis) 

 Notarthrinus vardhana, and diifer from those of Lyceenopsis in possess- 

 ing highly-developed hook (or spines) on the dorsal armature. I place 

 these specimens, therefore, provisionally in the genus Notarthrinus, but 

 believe they will probably, when more is knovni of them, be found to be 

 entitled to a separate genus. They deviate from Lyceenopsis also in 

 the very triangular and pointed fore wings, a feature, however, in 

 which they are approached by Bornean species_of Lycxnopsis, differing 

 therein from more typical Indian forms. 



They are accompanied by both sexes of Lycsenopsis plauta and 

 L. shelfordi from the same localities and the close resemblance of the 

 underside markings of the three species is notable, unrelated (com- 

 paratively) as they are, and the sexual dimorphism is also closely 

 parallel. 



The figures will make these descriptions more intelligible. The 

 photographs of the imagines, after the manner of photographs, un- 



