788 THECLA. By Dr. M. Draitdt. 



very light whitish-grey with white, proximally grey-tinged, postdiscal dentate lines and grey submarginal 

 lunae being on both sides bordered by white; the small orange anal spots are very small. Amazon, Bolivia, 

 Peru. 



siUbia. Th. sttlbia Heic. (156 i) resembles the preceding above, but beneath it is easily discernible by the 



postdiscal band being composed of crescents and exhibiting at the costal margin a separate small spot, which 

 is removed more towards the margin. Brazil (Esprritu Santo). 



villia. Th. villia Heiv. (156 i) belongs likewise here, the $ above more greyish-brown, towards the base with 



a dull ultramarine-blue tinge; the under surface is also very similar, somewhat more brownish with a lilac shine; 

 on the forewings the postdiscal band extends to the proximal margin, on the hindwings it runs a little more 

 straight, and there is a whitish discal streak indicated ; the orange spot of the tail is larger, pupilled with a black 

 triangle. Honduras to the Amazon. 



proba. Th. proba Godm. & Salv. (156 i) is above still more extensively and lighter blue than dindymus, beneath 



whitish, \\ithout any marking at all. From Panama. 



lenUas. Th. letlitas Drc. (156 i) is above monotonously dull-brown, only at the proximal margin quite narrowly 



dusted with blue, the hindwings in the disc a little more extensively violettish-blue. Beneath light brownish- 

 grey, marked like dindymus, but the orange anal spots are absent altogether. Brazil to Paraguay. 

 sirenua. Th. strenua Heic. (156 i) may also be yet included here. It differs above from the similar preceding 



species by a somewhat more extensive and brighter blue coloiu-; beneath the ground-colour is more red-brownish, 

 the white, proximally dark-bordered lines are removed a little more inwardly, also the red spot between the 

 median veins ; between it and the small anal spot the ground is dusted iia a bluish white. Brazil. 

 hcloisa. Th. heloisa MscMr. is a species that has remained unknown, described according to a $: above brown, 



on the hindwings with a grey tinge, towards the base lustrous bluish-grey with a red anal spot. Beneath light 

 greyish-yellow ; the postdiscal white, proximally bordered by brown, on the forewings removed inwardly below 

 the lower median vein, on the hindwings towards the proximal margin forming a W ; a series of white submarginal 

 lunular spots is on the forewings only visible between the radial veins, on the hindwings interrupted above 

 the upper radial vein; the small red anal spots proximally bordered by white; betw-een the lower radial veins 

 the white submarginal lunae are double. Length of forewings: 16 mm. Paramaribo. 

 purisshna. Th. purissima S'p. nov. (156 k) is only half as large as dindymus, above in the $ very much like it, dull 



lustrous greyish-blue, distally broadly grey. Beneath quite snow-white with an extremely fine, blackish post- 

 discal running almost the same, only less curved, more parallel to the border; the submarginal lunae the same, 

 the tiny spot of the tail orange-red, between it and the blackish anal spot a small, grey, roundish spot. 1 $ from 

 Panama (Lino) from the Coll. Fassl. 



82. Orcynia- Group. 



orcynia. Th. orcynia Hew. (= anthracia Hetv., aunia Hew.) (156 k) has a somewhat variably blue upper surface, 



sometimes niore violet, sometimes more greenish-blue, and the larger apical half of the forewing black; at the 

 anal angle of the hind^^ing an indistinct, small, red spot. Beneath likewise variable in a more grey or brown 

 tinge with a mostly very clear w hite postdiscal being proximally tinged in a fine darker colour, forming inwardly 

 a V on the forewing below the lower median vein, whereas on the hindwings it is displaced outwardly between 

 the radial veins and forms a flat W at the anal angle; brownish submarginal lunae are on both sides dusted 

 cloud-like in white, the broadest above the median veins; the orange anal spots very small; a white double 

 streak at the cell-end may be present or absent. Very common and most widely distributed from Mexico to 

 Venezuela, Colombia and Bolivia. 



catharina. Th. catharina sp. nov. (156 k) is very closely allied to the preceding, but I take it to be decidedly a 



different species. It is above not quite as extensively dull violettish-blue, the apex very broad blackish-browai. 

 Beneath the postdiscal line on the forewing is parallel to the distal margin and composed of flat lunae, in all 

 the specimens seen oi. orcynia running nearer to the anal angle and much more linear; on the hindwings there 

 is instead of the two white cell-end-streaks one dark one, the two orange-red anal spots are better developed. 

 According to 2 fresh ^^ from Sa. Catharina from the Coll. Weenicke. 

 ahola. Th. ahola Hew. (= cordelia Heiu.) (156 k) is above decidedly more lustrous greenish-blue and beneath 



easily distinguishable from orcynia by the white, basal, transverse line on the hindwing. Mexico, Colombia, 

 Venezuela. 



marmoris. Xh. marmoris Drc. does not differ above from ahola; beneath the forewings exhibit a double, w^hite 



cell-end-streak, the postdiscal line is more undulate, and before the distal margin there are dark cu-cular spots, 

 sm'rounded by white, no crescents, Colombia. 



