Irprcscntocl liy a low ridg'o : lictweon the st.ernitc ami the ponis-shentli there is 

 at each side a strongly chitiuised, needle-like process (PI. XX\'. t'. J, n). The 

 clasper is divided ajiically by a loDg'itndinal slit (PI. XXV. f. v!j ; the ventral 

 ])rocesses of the clasper are fused together, completely or ])artially, to form a single 

 ventral process (PI. XXV. f. '2, pr^, wliile the snbmesial processes ( jidr and pdl) 

 are quite une(]ual. The details of the armature are very different in the specimens 

 from different countries, and there is also some individual variability. 



?. The eighth tergite is mesially sinuate; on the upper surface of tlie lobe's 

 tlierc is a ]irfijecting cone or lobe (PI. XVIII. f. .3. 8), or there is no further 

 armature. The vaginal plate (Pi. XVlll. f. 1. 4) agrees better with those of the 

 members of Chiiiis than with the i)late of dfiitatus : the antevaginal part is very 

 restricted, membranaceous, with a low, stronger chitinised, smooth ridge {nrp) in 

 front of the vaginal orifice (I'); the [)ostvaginal jjlate {p>'p) is very large, this 

 ]ilate visible in the specimens after removal of part of the scaling of the seventh 

 sternite : this armature different, like the eighth tergite, in the different subspecies. 

 The antenna similar to tiiat of c?, the middle and basal segments much iiigher 

 tlian broad ; tlie liorizontal diameter of the ventral pai't of tlie transsectiou about 

 half as long as the diameter of the dorsal part. 



Ijarva green, granulose. with two yellowish green dorsal lines and whitisli 

 oblique side-bands, granules white, liead triangular, horn rather long. — Food-plant: 

 '• Lussorah " (N. India), " Tanteitai-lugai " (Pliilipi)ines). 



Pupa not described. 



Ilah. Ceylon, N.W. India, N. India, ( 'hina, Pliilippines, probably also on the 

 Sunda Islands. 



The five subsjiecies are nearly all so very different in the structure of the sexual 

 armature (compare PI. XXV. f. 2, and PI. XXXIV. f T. S. 9. 10) that one might 

 be induced to consider these forms as being specifically distinct. But as they are 

 clearly geographical representatives of one anotiier, and as, further, tlie material in 

 collections is quite insufficient to sliow us the range of variation of these individually 

 variable forms — only from N. India a series of specimens is available — we treat 

 tlicni as subspecies. 



P. trllilU-it'is l,if,;if>is subs 



cJ?. Body and wings cinnamon-isabella colour, or cinereous-grey. JIarkings 

 as in triliiwatuii umfatus, but the dentate line between the discal and postdiscal 

 lines of the forewiug nearly as distinct as in rlcufiitus, Tlie distal margin of the 

 forewiug not scalloped, convex in middle. 



<?. Tenth abdominal tergite (PI. XXV. f 4j much shorter than in fr'dinmtus 

 iiiuhitiDi, the sternite higher, more strongly chitinised, the distal edge slightly 

 bisinuate, with a short, narrow, mesial lobe. Clasper divided into a dorsal and 

 ventral lobe (PI. XXXIV. f. 8), but the incision not so deep as in trilin. uudatiiH, 

 and the lobes differently shaped : the ventral one especially disagreeing in being 

 rounded and provided before the end with a transverse fold which inclines apicad 

 and gives the lobe the aj)pearance of being transversely cleft ; the ventral 

 nnpair process common to the two liarpes is apically bent towards the right side 

 (PI. XXXIV. f. in) ; the figure gives the process in a dorsal view, and shows the 

 connection between it and the processes of the penis-funnel (^pdr and pdl) ; the 

 process pdr is either acute, as in figure, or obtuse. 



?. The eighth tergite has no special armature on the dorsal surface, the 



