HETEROCERA OF SIKHIM AND BHUTAN. 4ii 



133. C. mydon, Wlk. 



Sikhim and Bhutan, up to 4,000 feet. Occurs in March, May, 

 June, July and August. The larva from Bhutan is pale green ; the 

 thoracial somites increasing rapidly toward the fourth and slightly 

 depressed, striated with clear white dorsally ; a dorsal and lateral 

 suffused purplish line, the latter surrounding a dark purplish ocellus 

 with a white ring and black pupil on the fourth somite. Anterior legs 

 pinkish-brown with brown patches at their bases. All somites striated 

 laterally with purplish, which is more apparent as the larva becomes 

 full-fed. Head small and with the prolegs concolorous with the body. 

 Horn of moderate length, pinkish-brown. No dorsal markings in the 

 Bhutan specimens. Food-plant different species of Arum or allied 

 plants. Pupa formed in a light cocoon of dried leaves on the surface 

 of the ground ; earthy-brown striated with darker, proboscis in a 

 projecting sheath not separated from the body. 

 1 35. C. gloriosci) Butl. 



Sikhim. This must be very scarce. I have never seen a specimen. 

 (Seems local. My specimens were all taken in July. — H. J. E.) 



136. C. castor, Wlk. 



Sikhim. This species was formerly known as C. olivacea, Moore. 

 My specimens, which I thought identical with it, must be distinct, as 

 they have the orifice in the basal joint of the palpus, and therefore 

 belong to the genus Theretra. 



130a. C. griseomarginata, Hampson. 



Sikhim, 1,800 feet (Dudgeon). The type and only specimen of this 

 very distinct species was taken by me at light at Punkabaree. It is 

 in the British Museum. 



Genus Theretka, Hiibn. 



This genus is separated from Chcerocampa by having the basal joint 

 of the palpus hollowed out, with an orifice towards the exterior beset 

 with (?) sensory setse. I do not think this is at all a good generic 

 character, some species having the orifice largely developed, and 

 others very slightly. T. lineosa, Wlk., which Sir George Hampson 

 leaves in the genus Chcerocampa, has the orifice distinct, although 

 small ; it should therefore be placed in Theretra. 



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