766 THECLA. By Dr. M. Dratjdt. 



aurora. Th. aufora Drc. (151 a) is above much brighter and more extensively blue with a somewhat smaller, 



black scent-spot immersed in the blue; beneath lighter, more brownish, the markings finer. Brazil (Espiritu 

 Santo, Sta. Catharina, Rio Grande do Sul). 

 malvina. Th. malvina Hew. (151 a) is a little larger, above duller violettish-blue with a somewhat broader, 



black apex than aurora and a large, red-brown scent-spot, beneath somewhat bro\vner, the proximg,! Ime of 

 the forewmg very oblique and consisting of single, small spots. Brazil. 



janthina. Th. jailthina Hew. (151 b), with longer, almost diaphanous wings and a violet upper surface with a 



slight yellowish reflection, has only a small, narrow scent-spot at the lower cell-end on the median; beneath 

 no difference. Guatemala to Brazil. 

 armilla. Th. armiUa Drc. is coloured above lil^e jayithina (151 b), but the shape of the wings is that of sista 



(151 a), and the scent-spot at the lower cell-end is more prominent than in janthina; the under surface is darker. 

 Rio de Janeiro. 

 flosculus. Th. flosculus Drc. (151 b, c) resembles armilla above, but the blue is more extensive, with p. purple 



lustre and not so brilliant; the under surface is greyer, the markings more distinct, broader white. Espiritu 

 Santo. 



cydonia. Th. cydonia i)rc. (151b) has the shape of ^'are^/ima, but quite black forewings and a somewhat broader 



black margm of the cornflower- coloured hindwings. Beneath there is no difference. Colombia. 



mutina. Th. mutina Hew. (151 b) is beneath almost like sista of which it has the shape of the wmgs, but 



the anal angle of the hindwing has no green, but bluish-white dusting. The upper surface is entirely different, 

 dark blackish-brown, on the proximal margin of the forewing, and in the larger inner-marginal half of the 

 hindwing, it has a deep indigo-blue tinge, Mdthout a scent-spot. Guiana to the Amazon. 

 mecrida. Th. mecrida Hew. (151 b) has above a somewhat more extensive, more greenish blue, on the under 



surface there is instead of the small basal, costal-marginal spot of the hindwmg a white stripe being distally 

 bordered by blackish-brown and extending as far as the lower cell-angle. — • In some cases this stripe is confluent 

 anastomosis. m the middle with the postdiscal dentate-line; this is anastomosis form. nov. (151 b). Guiana to the Amazon. 



conovcrla. TH. conovcria Schs. is a little larger, above more extensively metallic-blue with a dark spot at 



the cell-end, but without any scent-scales. Beneath there is liardly any difference, but on the hindwings the 

 postdiscal (median) white line runs straight from the costal margin to the lower median vein on which it is 

 broken, then running in the shape of a W to the proximal margin. Expanse of wings : 24 mm. Petropolis. 

 myrtusa. Th. myrtusa Heiv. (154 d) resembles the following, but on the hindwing the distal band beneath is 



absent, on the forewing the white costal -marginal spot is removed more towards the base, and between the 

 red spot of the tail and the anal angle there is extensive, bluish-white dusting. Amazon. 

 myrtea. Th. myrtea Heiv. (151 b) is very similar, the ^ above dull violettish-blue with a broad black apex, 



without a scent-spot, the $ dull bluish-grey, distally broad blackish-brown. Beneath brownish-grey, on either 

 wing with two white rows of lunular spots, the proximal one being proximally bordered by black, the distal 

 row distally, the hindwings in the q with a very convex costal margm which covers a red-brown scent-scale-spot 

 on the under surface of the forewing below the median. Marginal line subtile black, proximally white; between 

 the tails an orange-red, black-pupilled spot, a smaller one at the anal angle, between them some white dusting. 

 Colombia, Bolivia, Amazon. 



malvania. Th. malvatiia Hew. (151 c) is larger, more lustrous metall'c blue, but only in the basal third of the 



forewing; the costal margin of the hmdwing broadly brown, the distal margin narrowly black. Beneath it 

 resembles the preceding, but the white costal-marginal spot of the hindwing is removed more towards the 

 margin as the beginning of the white postdiscal, the costal margin is less convex, and the forewing is without 

 the distal macular line. The 3 last species might also be placed in the corresponding subordinate group of the 

 sickaeus-gvo\rp . Amazon. 

 hianca. Th. biaiica Mschlr., described according to a 2 being closely allied to the jireceding, has remained 



unknown. Above dark-bromi, towards the base greyish blue, on the hindwings more extensive. Beneath 

 greenish-grey, the postdiscal on the forewing consisting of separate, white, towards the base black, small spots, 

 on the hindwing continued as a strongly broken stripe; submarginal, white, towards the margin black, small 

 spots; spot of the tail oval, red, bordered by yellow; anal spot black, between both bluish-white dusting. From 

 Surinam. 



43. Polibetes-Group. 



poKbetes. Th. polibetes Cr. (= zoe Eeah.) (152 c). This and the following species all exhibit a black or black 



and ^^■hite costal-marginal spoti near the base of the hind-\ving beneath. Above deep blue with a moderately 

 broad, sharply delimited costal margin and distal margin and fine black veins and a large black median spot; 



