BETEROCERA OF SIKHIM AND BHUTAN. 413 



A. Palpus with the basal joint distinctly hollowed out, second joint 

 quadrate and not excised. 



(a) Forewing dark olive with the markings black and suffused ; 

 abdomen with scarcely a trace of the lateral golden marks (generally 

 <altogether wanting). Underside of the forewing icith the submarginal 

 band not connected by a bar with the fuscous basal suffusion. T. velata. 

 Sikhim and Bhutan, May and June, up to 4,000 feet. Exp. 67-76 

 millimetres. 



(b) Forewing greenish-olive generally suffused with reddish at the 

 base., and with pale patches more or less developed at the apex and outer 

 angle -, abdomen with golden lateral bands. Underside of forewing 

 with the markings well defined, the submarginal band connected to the 

 basal suffusion by a dark bar between veins 4 and 5. T. aurifera, Butl» 

 Sikhim and Bhutan, July and October, up to 7,000 feet, Exp. 

 $ 75-80, £ 93 millimetres. 



B. Palpus with the orifice reduced to a narrow slit, second joint 

 rising to above the centre of the eye, quadrate and not excised. 



(a) Forewing greenish-yellow or green with no fuscous markings ; inner 

 margin narrowly white, with a white streak above it and below vein 1, 

 rising from the margin at % from the base and reaching halfway to the 

 base ; three subbasal indistinct green lines ; a round pale-centred spot in 

 the cell ; three postmedial parallel waved red lines ; a silvery -bluish streak 

 from the apex to the outer postmedial line meeting it at vein 5, and con- 

 tinued as a lunulate line from below vein 4 to the angle ; a marginal row of 

 seven silvery -bluish quadrate spots. Underside ochreous, with the outer 

 margins purplish ; the submarginal band not connected to the basal 

 fuscous suffusion. T. aurifera (id. Hampson). Sikhim and Bhutan, 

 3,000 feet, July. Exp. 81-84. This is a rare species, which I 

 considered to be C. (olivacea) castor, Wlk., but Sir George Hampson 

 identified it as aurifera, from which I think it is widely distinct. He 

 has not moved C. castor into the genus Iheretra, so that I suppose 

 the type has no orifice in the palpus. This species I therefore 

 consider requires a new name. 



C. Palpus with the orifice extended by the second joint being 

 excised and triangular. Shape of the whole palpus similar to that of 

 T. actea, Cram. 



