78 Mr. A. G, Butler on the 



oblique grey spot on the discocellulars, a grey spot above 

 tlie latter on the costal border ; a small black spot on the 

 middle of the cell, below it on interno-median interspace 

 a <-shaped grey marking, and, nearer to the base, a black 

 spot; area immediately beyond the discal line slightly 

 suffused with grey ; secondaries with the discal area 

 greyish ; wdngs below more distinctly speckled with black ; 

 elbowed line of primaries broken np into grey spots ; grey 

 discocellular spot as above ; secondaries with an arched 

 discal series of blackish A-shaped markings ; abdomen 

 speckled with black : expanse 2 inches 5 lines. 



Emerged on the 27th February, 1874, from a cocoon 

 found on Bactria in Paramacu forest. 



Peismoptera, u. gen. 



Allied to Ernolatia, but differing entirely in the neura- 

 tion of primaries ; the subcostal vein running parallel to 

 the costal margin throughout its entire length, emitting 

 only two branches from its inferior margin beyond the 

 cell (in Ernolatia the second branch breaks up into three, 

 so that its subcostal may be said to be five-branched, the 

 continuation of the main stem being counted) ; costal 

 margin considerably more arched towards the apex ; outer 

 margin nearly straight instead of elbowed ; anal angle of 

 secondaries less produced. Type, P. opalina. 



147. Prismoptera opalina, n. sp. (PI. III. fig. 9.) 



"VVings transparent white with prismatic reflections ; 

 margins and veins opaque ; three pairs of sandy-yellow 

 spots on the costa; indications of several parallel undulated 

 central greyish lines ; outer border and a sul^marginal 

 series of lunate spots indistinctly greyish ; secondaries 

 Avith a small cadmium-yelloAv spot on abdominal margin 

 near anal angle ; head above and main stem of antennae 

 white ; pectinations of antenna3 fulvous ; thorax and 

 collar sordid ochreous, speckled with opaline scales, white 

 at the sides; abdomen whitish; body below white, front of 

 pectus ochreous, legs (excepting the tarsi) brownish : 

 expanse 1 inch 5 lines. 



Prainha, 14th November, 1873. 



Anthockoca, n, gen. 



Allied to Bomhyx and Norasuma, but differing from 

 them in structure just as Prismoptera does from Erno- 

 latia; from the preceding genus it differs (as Norasvma 



