HETEROCERA OF SIKRIM AND BHUTAN. 625 



218. P. sangana, Moore. 

 Sikhim and Bhutan. This and P. raya appear to be the two most 

 frequently met with in Sikhim. 



219. P. torpida, Wik. 



Sikhim, 1,800 feet. This is a much smaller insect than the two 

 preceding. I have only one male specimen, taken at light at the 

 elevation above-mentioned in May. 



220. P. procera, Feld. 



Sikhim, 1,800 feet. This seems to be near the next species, but 

 differs in having much less silvery suffusion, which is confined to the 

 basal portion and the posterior angle of the fore wing. Frons brown ; 

 vertex of the head white, as in P. sangana ; apical patch on fore win o- 

 evenly rounded on the inner edge. The segmental bands of the 

 abdomen are much more pronounced than those of P. raya. The dark 

 sub-basal patch mentioned by Hampson does not appear to me to be 

 sufficiently conspicuous to be of much importance as a distinctive 

 character. I have taken both sexes in May and July. 

 22.1. P. raya, Moore. 



Sikhim and Bhutan. This is at once recognisable by the fore win o 

 being entirely suffused with silvery-grey, the vertex of the head and 

 frons being buff, and the apical patch on the forewing having its inner 

 edge waved. The males of this and the three preceding species have 

 the terminal segment of the abdomen marked with a large pale quad- 

 rate patch which is lacking in the females. It occurs in June some- 

 times very plentifully. 



221a. P. bilineata, Hmpsn. (Plate I, Fig. 2, 9). 



Bhutan, 2,500 feet, This belongs to a separate section of the genus 

 in which the males have the antennae bipectinate for two-thirds the 

 length. The female from which the figure is taken is the only speci- 

 men I have obtained. The male was described from the Khasias. 

 Genus Gabgetta, Wlk. 

 222. G. costigera, Wlk. 



Sikhim and Bhutan, 1,800 to 3,000 feet. I have only taken this at 

 light. The antennae are similar in both sexes, and the female is dis- 

 tinguished from the male by the absence of the tuft of long hair on 

 the underside of the forewing below vein 1. In a pair of winos 

 bitten off a male insect by a bat, I notice that the lobed costa of the 



