ADELPHA. By H. Fruhstorfer. 515 



reflection. The double-spot beyond the cell also prominent. Under .surface intensively reddish-lirdwn. From 

 the Rio Negro and along the Andes from Colombia to Bolivia *). 



A. alala is considered as the most common Adelpha in the region of its occurrence, .\ccording to 

 Hahxel it is met everywhere in open places sitting together in groups, apart of the society of the likewise com- 

 mon Megaiura, but like them always with their wings spread out. The species is extremely variable, and beside 

 its sensitiveness to territorial influence we know for certain tliat it also succumbs to metagenesis. We know- 

 specimens with fine reddish-brown bands on the under surface, beside such witli pale, faded colours as seen 

 in ehrhnrdti (1(18 a), thus showing the typical colouring of the dry season. The uppersm-face is also subject to 

 various modifications. Especially the extent of the reddish-bi'own submarginal band is most variable. It may 

 either traverse both the wings as a series of coherent spots {completn), or be completely present only on the 

 forewings (com). Furthermore there are specimens with only 3 or 4 reddish-brown subapical spots {nlrila, prae- 

 caria) and, finally, such without any leddish-brown maculae ;it all ))eing replaced by white ones (albifida). 

 The one white-speckled form is jiresumably also a production of the rainless period. According to the few 

 documents I was able to examine, the valve of the clasping-organs seems also to be subject to slight variations 

 of its contour. The valve is short, with nearly square base and steeply raised or cut off end (albifida) or obviously 

 elongated with a more slender end tapering softly. A sharp double-point is common to all the forms. The 

 medial dorsal tooth stunted, the most insignificant in albifida, the broadest in cora from Peru. The uncus itself 

 remains remarkably slender, pointed and is, in that respect, only beaten by the forms of the group of A. zina 

 and A. irmina. alal^i/e(r., the typical form, without the reddish-brown submarginal band on the upper sur- aUda. 

 face, comes from Venezuela, the white median zone sometimes relatively broad (alala). occasionally very narroAv 

 (titia form. nov.). the transcellular white small comma-spots always pregnant. — completa Frvhst. occurs in '!/'"' i., 

 Colombia. The yellowish-brown bands are less developed than in alala, and we have even a form without red- 

 dish submarginal spotting of the hindwings, praecaria form, nov., being denoted in 108 a as completa. The speci- pi-dcairUt. 

 mens I have at hand are immediately recognizable as such of the dry period, with faded under surface, and 

 such with sharply prominent reddish-brown bands of the under surface. The specimens being coloured the 

 most brightljr beneath are lacking the ochreous band of the upper surface of the hindwings. — negra Fldr. is Jicjrti. 

 a form from the Upper Rio Negro reminding us of titia. and praecaria and exhibiting a narrow white median 

 band of the hindwings. The yellowish anal spot of the hindwings appears somewhat smaller than ii^ titia as 

 well as the subapical maculae of the forewings. The luider surface of all the wings somewhat jaaler and more 

 faded than in the form of the rainy period from Venezuela. — ehrhardti Neubgr. (108 a) was based upon speci- chrhanlli. 

 niens without reddish-yellow decoration of the upper surface of the hindwings. We figure a specimen from 

 Paramba, Ecuador, 1200 m, collected in April during the dry peiiod. with all the marks of the generation of 

 the rainless period. Several more ^^^ from Ecuador, in Frithstorfer's collection, are just as brightly coloured 

 and distinctly striiJed as the typical form from Venezuela. White median band only little broader than in 

 sjjecimens from Venezuela, somewhat broader than in those from Colombia. The distal subapical maculae 

 more pregnant and darker than in completa, but terminating already at the anterior median vein. — cora Fruhst. cora. 

 analogous to ehrhardti, but immediately distinguishable from it by the yellowish submarginal band reaching, 

 on the forewings, from the costal margin as far as into the anal angle. Under surface darker than in ehrhardti. 

 white median band distally more extensively bordered in yellow. Pozuzzo (Peru). — albifida Fruhst. from (ilhiiklu. 

 Peru has a more extensively white median band than completa, the distal subapical row of 5 dots white instead 

 of yellow, beside=i there are not any traces whatever of a yellow submarginal band on both the wings. Under 

 surface, especially in the apical area of the forewings, more extensively spotted in white than in any allied 

 alala-ioviw. — ■ privigna snbsp. (or form.) nov. is a form or race analogous to albifida, with considerably narrower yririyim. 

 white area on both the wings. Habitat presumably Peru or the Upper Amazon. — negrina siibsp. nov. (108 a) iieyrhin. 

 is a form being common in many parts of Bolivia. Beside it a local race, fillo Friih.^f., is found in Western Bolivia fillo. 

 and Argentina, pre-^umably at another season. Resembling ehrhardti, with yellow bands interrupted ad the 

 anterior median vein, under surface of the wings, however, lighter than in ehrhardti and cora, the subapical 

 white spots of the forewings considerably smaller and the white median band much narrower than in negrina. 

 The $ of negrina was discovered by Fassl in Bolivia. It is somewhat larger and of lounder wing-contours than 

 the (5*, exhibiting somewhat more extensive reddish-yellow subapical maculae of the forewings, 



A. corcyra, from Colombia to Ecuador, occurring beside .-l. alala from which it differs by tiic broader 

 hindwings projecting with an obtuse tail. The white zone of the forewings decidedly narrower, anteriorly reduced. 

 The small transcellular spots are standing in one row above the median band and are always effaced. — corcyra rorrnra. 

 Hew. (108 a) was set uji by its author according to much smaller specimens than the one we present. 'Hie sjjeci- 

 mens also vary beneath according to the seasons and altitudes from a lighter colour to darker grey. F.\SSL 

 found corcyra still at an altitude of 2200 m in the Eastern Clordilleras of Colombia. The small form as well as 

 the large form are included in the so-called Bogota-consignments. — collina Heic, an excellent territorial form mlliiut. 

 with considerably narrowed I'eddish-yellow submarginal band of the forewings and posterioily reduced white 



*) Valve set with sharp spines, narrower and longer tlian in .1. nli/nlliid. ilunicula, liiiwrver. niiuli bioader and 

 shorter, uncus more sjiadiceous instead of simply pointed as in oh/iilhia. 



