Publ 3. II. 1920. THECLA. By Dr. M. Draitdt. 785 



with a broader black margin, above and beneath absent white costal-marginal diffuse spots vary greatly, 

 if larger series are to be looked at. It lies before me from the Amazon and Colombia. 



Th. orocana Drc. (156 b), however, is undoubtedly a different species; it has above all no tail, but orocana. 

 an extended, inwardly curved anal lobe of the hindwing, as some species of the amyntor-grouj) (p. 762). The 

 colour above is a lighter, radiant greenish-blue, the apex of the forewing is very broad black ; whereas in orobia 

 and orobiana the blue colour of the hindwing above the upper radial vein extends constantly in the shape of 

 a bow into the brown costal margin, it runs here below the said vein straight on to the distal margin. Beneath 

 there is Httle difference: the blue discal stripe of the forewing is absent, on the hindwings there are at the anal 

 angle but very sparse golden-green scales. Peru, Colombia (Canon del Tolima). 



78. Hyacinthus-Group. 



Th. hyacinthus Cr. (156b) is above sky-blue with a narrow black margin; beneath the forewings hyamnthu.^. 

 are greenish-blue with a narrow black margin and two bands before the distal margin, the hindwings exhibit 

 a yellowish-brownish band from the middle of the proximal margin to the costal angle, broadly bordered in 

 black, and black spots before the distal margin. West Indies. 



Th. pholeus Cr. (= philanthus Stoll) (156 b) is a little similar, above peacock-blue, the $ bro-mi; phaleus. 



on the under surface the ^ is greenish-blue, the $ yellowish-grey with black bands and a yellowish-brownish 



stripe on the hindwings as in the preceding. — Whereas the northern specimens from Surinam and Cayenne 



always exhibit some small, metallic greenish-blue spots in the median black band of the hindwing, the southern 



specimens from Brazil and Colombia are always without them, they may therefore be denominated meridio- meridiona- 



nalis fo)-m. nov. (156 b). — At both the habitats there occur small ^^ with a brown sround-colom' above like . . ,.''*• 

 Ar.. ^ ... , jeminalis. 



the v2: leminalis form. nov. 



Th. selina Hew. (156 b) cannot be justly called a distinct species, as long as a 3* fitting to it has not selina. 

 been ascertained. The $ does not differ from that of pholeus above, but beneath the forewings are unicolorously 

 browTi with 2 darker submarginal bands; on the hindwings the costal margin next to the base is broad red- 

 brown, otherwise as in pholeus. The most positive assertion for the qualification of the species is the fact 

 that in the black median band there are always greenish-blue spots which are forever absent in southern speci- 

 mens of pholeus. Brazil, Ecuador. 



Th. nautes Cr. (153 b) is larger, above darker with a small, darkbrown scent-spot and broadly darkened nauies. 

 veins. The under surface is very characteristic and unmistakable. In the ^ the proximal half of the forewing 

 is peacock-blue, but not in the 9 which is also above brown. Ecuador, Amazon. 



Th. elis Cr. (156c) preponderantly differs by its under surface; the forewing exhibits in the disc elis. 

 3 or 4 black, blue-pupUled eye-spots standing below each other; on the hindwing there is at the costal margin 

 nearer to the base another black, blue-pupilled eye-spot ; the yellowish-grey longitudinal stripe extends towards 

 the costal angle, in nautes between the radial veins to the distal margin. Brazil. 



Th. bactriana Hew. (156 c) we insert here on account of the under surface resembling somewhat hacMana. 

 pholeus, though it is otherwise quite isolated. Above light-blue with a broadly black apex and a large, light- 

 ringed scent-spot. Beneath yellowish-brownish with similar spots and bands as pholeus. Amazon. 



79. Empusa- Group. 



Th. empusa Hew. (= tympania Hew., bethulia Hew., halciones Bflr.) (156 c) is above deep blue, empusa. 

 in the larger apical half black. The under surface is light grey with fine brown postdiscal lines, distallj^ bor- 

 dered by white, proximally by a very fine orange-yellow, on the hindwing beginning with an outwardlj^ displaced 

 streak-spot at the costa; quite indistinct, small, submarginal lunular spots are only visible on the hindwing 

 by being on both sides dusted in v/hite; at the anal angle there is a small black spot, being above bordered 

 at first by white, then by orange ; proximally follows a white-dusted part, then bet-ween the median veins again 

 an orange, small spot. Distributed from Mexico to the Amazon and Bolivia. 



Th. purpuriticus Drc. (156 c) is above just the same, beneath darker, on the hindwings between the purpurUl- 

 median veins before the border much more extensively dusted by orange, the submarginal shades placed nearer '""*" 



to the postdiscal and more proximally. Colombia. 



Th. tarena Heiv. (156 c) is most similar, above hardly different, but the costal margin of the hindwing iamia. 

 is broadly brown. The under surface ist more brown, the lines as in empusa, but more indistinct, the red spot 

 of the tail placed more proximally. Guiana. 



Th. gentiana Drc. (156 d) differs above from tarena by a very large, black, oval scent-spot being proxi- geniiana. 

 mally surrounded by slate-blue scales. Beneath like the preceding, the lines still weaker and a little straighter, 

 the red spot removed more towards the margin. Colombia. 



V 99 



