MABUMBA. 179 



the spiracles and venter watery-green with white tubercles ; 

 these two areas sharply separated by a well-defined, bright 

 yellow, subspiracular stripe on segments 2 to 4, this stripe 

 edged below by chocolate, and sometimes continued back to 

 12 ; the oblique stripes formed of yellow or red tubercles, 

 each running across three segments. Horn bright green, with 

 tubercles of the same colour. Length 110 mm. ; breadth 

 12 mm. ; horn 15 mm. 



Pupa. — Not recorded. 



Habits. — Similar to those of others of the genus so far as 

 they have been observed. Food-plant unfortunately not 

 identified. 



42. Marumba dyras dyras (Walk.). (Fig. 35 F-I, genitalia; 

 fig. 37, imago ; PI. Ill, fig. 3, larva). 



Smerinthus dyras, Walker, 1856, p. 250 (Ceylon). 



Marumba dyras, Moore, 1S82, p. 9, pi. lxxviii, figs. 1, 1 a, b, c 



(U P-, & ?)• 



Marumba dyras dyras, Roths. & Jord., 1903, p. 274 ; Jordan, 1911, 



.p. 241, t. 42 e ; Mell, 1922, p. 153. pi. v, figs. 15-17 (larva), 



pi. xvii, figs. 4-6 (pupa) ; Seitz, 1928, p. 538. 

 Triptogon silhetensis, Butler, 1875, p. 255 (Silhet). 

 Triptogon oriens, Butler, 1875, p. 255 (N.E. India); id., 1877 A, 



p. 587, pi. xciii, fig. 3. 

 Marumba ceylanica Butler, 1875, p. 255 (Ceylon) ; Moore, 1882, 



p. 9, pi. lxxix, fig. 2 ($). 

 Triptogon massurensis, Butler, 1875, p. 256 (Mussooree) ; id., 



1877 A, p. 587, pi. xciii, fig. 5. 

 Triptogon fvscescens, Butler, 1875, p. 256 (Darjeeling) ; id., 1877 A, 



p. 587, pi. xciii, fig. 2. 

 Triptogon andamana Moore, 1877, p. 595 (Pt. Blair). 



Imago. — ^$. Fore wing grey, or earthen-brown with grey 

 powdering ; of the most distal double line the external one 

 is much heavier than proximal one ; the former stops mostly 

 at M 1 , but occasionally continued beyond, curving basad and 

 ending at the marginal spot ; the inner line encircles the spot 

 M 2 , its posterior portion often very faint ; there is sometimes 

 a chocolate- coloured area along outer margin. Hind wing 

 reddish to yellowish ; with fuscous base and large anal spot. 

 Tongue with fringe. Pilifer with brush of bristles. Antenna 

 one- third length of fore wing in £, a little shorter in 2. 

 Expanse: <$ 90-92 mm., $ 90-119 mm. A $ in the British 

 Museum measures 124 mm. 



o . In Sikkim specimens tenth sternite (fig. 35 F) elongate bell- 

 shaped, the sides rounded. Assam specimens (fig 35 H) have 

 a more slender and longer tenth sternite, it being sometimes 

 very narrow and straight. In specimens from S. India the 

 tenth sternite is intermediate in shape between the Sikkim and 

 .Assam examples, while it is broad, obtusely triangular in 

 Ceylon individuals (fig. 35 G). 



n2 



