THERETRA. 433 



Pupa. — Tongue-sheath projecting considerably in front of 

 head, the projection semicircular in side-view, ridged along 

 its edge ; antenna shorter than fore leg, which reaches to 

 between one-third and one-half distance to tip of wing-case, 

 mid-leg to between one-half and two-thirds. Surface dull and 

 smooth. Spiracle of 2 a narrow slit, the hind margin of 2 

 slightly curved-emarginate and the edge raised in front of it, 

 a transversely oblong lobe, its surface sightly tilted upwards 

 frontad, behind it ; remaining spiracles oval, central slit with 

 raised edges. Cremaster large, triangular, ending in a Y- 

 shaped bifid shaft, or in two shafts close together and parallel 

 with each other, each shaft bent outwards near its tip ; 

 upper surface convex, lower surface slightly hollowed, the basal 

 half with a narrow mesial channel, distal half with a double 

 mesial ridge, the whole longitudinally rugose. Colour : head, 

 thorax and wing-case ochreous mottled with fuscous ; 

 tongue -sheath dark brown ; a pink patch below the eye ; 

 abdomen : dorsum ochreous, rest dirty white suffused with 

 fuscous and marked with short dark lines, except the venter 

 and an irregular patch round each spiracle, these being 

 dirty white ; spiracles and a patch round each of those on 

 segments 6 to 8 black, the white patches mentioned above 

 surrounding the black patches ; cremaster black except the 

 ventral hollow, which is reddish. Length 73 mm. ; breadth 

 15 mm. ; tongue -sheath projecting 5 mm. in front of head. 



Habits. — Food-plants : Pongamia glabra Vent., family 

 Leguminoseae ; Barringtonia Forst., family Myrtacese ; Con- 

 volvulus Linn., family Convolvulacese ; Dioscorea Linn., family 

 Dioscoreacese ; Amor pho phallus Bl., family Aroidese (arums). 

 The larva is sluggish in its movements, moving slowly and 

 jerkily, but feeds voraciously. It turns pinkish in colour 

 before pupation, which sometimes takes place in a cocoon 

 made among the leaves of the food-plant. 



156. Theretra boisduvali (Bugn.). 



Sphinx boisduvali. Bugnion, 1839, p. 115 (nom. nov. pro creticse 



Boisd., S). 

 Theretra boisduvali, Roths. & Jord., 1903, p. 767 ; Jordan, 1912, 



p. 259, t. 42 d ; Seitz, 1929, p. 565. 

 Chserocampa punctivenata, Butler, 1875, p. 248 (Masuri ; Sylhet) ; 



Swinhoe, 1885 A, p. 288 (Bombay). 

 Chserocampa butus, Hampson (non Cram.), 1892, p. 93. 



Imago. — <J$. Greyish-yellow ; head and thorax with a pale 

 lateral stripe ; abdomen with five faint dorsal lines, the median 

 one very indistinct, and a black side-patch on first segment. 

 Fore wing with six dark lines, the one running to apex usually 

 accentuated on the veins by dark dots. Hind wing black 



vol. v. 2 F 



