( 1.^ ) 



a ]iiiir in excluinge — from Jaluit, Marscliall Islands, which ditlVr inaikfilly iVmu 

 all (Hir ronrolndi. The specitueus are small and very pale, paler on body and 

 forewin^- than the iudividuals from other localities, at least in tlie S sex, and 

 liave a yellowish g-rey tiut, which is very distinct in the S. We tliink it advisable 

 to await further evidence of the constancy of the characters which distinguish the 

 Jaluit specimens before naming the form. 



II. MEGACORMA gen. nov.— Typus : ohliqm. 



M.icrcxiila Walker. Lid. Lep. Iht. D M. viii. p. 198 (1851)) (partini). 

 Sj,h}ii.i-, Boisduval, Spec. Gen. Lip. ficl. i. p. 69 (1875) (partim). 



Diliuliii, Butler (iion Grote & Robins., 1805), Tr. Zm,l. S„c. Lnml. p. 612 (1877) (partim). 

 Megannlini, Kirby {iifui Boisduval, 1875), Cat. Lei>. Het. i. p. 682 (1892) (partim). 

 Pseit(h:y,!iiiu:, Hampsoa {,ioh Burmeister, 1856) in Blaaf., Fnaiiu Brit. Lid., Mitln i. p. 101 (18:)2) 

 (partim). 



S ? . Tongue much longer than the body. Second segment of palpus narrower 

 at base, triangular, very mnch shorter than first segment ; apex of the latter 

 with a regular and large cavity ; on the inner surface the first segment flat, 

 not obviously concave as in Herse, scaling at ajiical margin very regular 

 (PI. LX. f. 2), this scaling visible from the onter side (PI. LX. f. '■^) ; 

 inner surface of second segment all scaled, cavity less deep tlian in j'le/:-ic and 

 ArhtTontia, the roof of scales over the cavity not quite so distinctly separate from 

 the other scaling of the segment tlian in the allied genera. Antennae thickest not 

 far from base, gradually thinning towards end. Thorax very long, extending far 

 beyond the base of the forewing. Tarsi long, slender, s])ines short ; middle and 

 hinder tarsi with conspicuous comb of prolonged spines ; hinder tibia as long as 

 first tarsal segment ; pnl villus present, paronychiuni with two lobes on each side. 



cj. Tentli abdominal sternite with a broad rounded mesial lobe, convex below. 

 Harpe armed with long teeth. Clasper with a large patch of very broad, multi- 

 dentate scales, and eighth tergite witli elongate, tawny, friction-scales at the apex : 

 these scales turned inside, but not forming a ribbon as in Ambulicinne. Anterior 

 coxae witii scent-organ ; the tufts of iiairs generally visible without removal of 

 the coxae. 



? . Eighth tergite sliallowly and broadly sinuate, the angles strongly rounded. 

 Vaginal plate membranaceons i)roximally, much folded ; anterior margin of the 

 vaginal orifice produced into a truncate, fee])ly sinuate, lip, the angles prominent ; 

 post-vaginal part of plate more strongly chitinised, smootli, sliort (PI. XXII. f. 3). 

 Early stages not known. 



The peculiar structure of tlie pal[)i luis been overlooked; the conspicuous 

 cavity formed by the scaling at the end of tin; first segment of the palpi is similar 

 to that found in Theretra and allies. 

 Hab. Oriental Region. 

 One species. 



0. Megacorma obliqua. 



*Macro^ihi uhliipia Walker, I.e. p. 208. n. 15 (1856) (Ceylon ;-Mus. Biit.). 

 *.^j,hiii.r iifdoi- Boisduval, I.e. p. 113. n. 54 (1875) (Himalaya, ? ;— coll. Charles Oberthur). 

 Dllmlia „bli<pi>i, Butler, he. p. G14. n. 10 (1877) (Ceylon) ; Moore, Lep. Ceylon ii. p. 4. t. 74. f. 2. (1882). 

 Majanuluu obliqua, Kirby, I.e. n. 2 (1892) (Ceylon). 



