50 [August, 
86. — Olyras Theon. 
^ . 4." Near 0. Crathis. Fore-wing more broadly rounded at the 
apex, with outer margin a little incurved after the middle. Hind-wing 
much less angular and longer, the length of the lower radial nervure 
being 6|"' instead of 5|'" as in O. Crathis. Colours very similar ; fore- 
wing crossed by three transparent, yellowish, macular belts (besides an 
oblong spot at hind angle), but the first belt across the cell is very 
oblique and narrow, and is not continued between the branches of the 
median nervure except as a round spot near outer margin. The longi- 
tudinal spots forming the second belt and the costal apot of the third 
belt are very much longer than in O. Crathis, and the black outer 
margin is very much narrower, both in the fore- and hind-wings. The 
underside differs in the disc of the hind-wings being dull brownish- 
tawny, without a trace of yellow tinge either on membrane or nervures ; 
the number of oblong shining white spots near the costa is three instead 
of two. 
Guatemala. 
87. — Thyridia Melantho. 
($ . Exp. 3" 8."' Eesembles closely, in size, form of wings, and 
neuratiou, Th. jEdesia. Differs conspicuously in colours, the hind- 
wings being of a rich orange-tawny instead of isahelle-co\ow.Y, and the 
fore-wings being of a deep black, with semi-transparent spots scarcely 
tinged with pale greenish-yellow. The spots are much smaller than in 
Th. jiEdesia, there being two confined within the cell (the basal one 
small and dusted with black), and three sub-apical in the same relative 
positions as in Th. jEdesia, but less rounded, as well as smaller. The 
hind-wings have a black border and spot over the end of the cell ; the 
border has three or four small white spots, and is broad and indistinctly 
limited towards the apex. Antennae black, club yellow. Underneath : 
same as above, except that the black outer-borders have a continuous 
row of white spots. 
Panama. 
88. — Dircenna xenos. 
cJ . Exp. 2' 9."' In size and general appearance resembles a small 
male of Thyridia Jemima, Hubn., but differs remarkably in important 
points of structure. The terminal fork of the fore-wing sub-costal 
nervure is much farther removed from the apex, and the second sub- 
costal branch arises from near the end of the cell ; the recurrent nervule 
in the fore-wing arises from the middle, instead of the lower, disco- 
cellular, and is absent altogether from the hind-wing ; the corneous 
receptacle for the pencil of hairs in the hind- wing is broad, and resem- 
