ADELPHA. By H. FRUHSTORFER. 515 
reflection. The double-spot beyond the cell also prominent. Under surface intensively reddish-brown. 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. According to 
HAHNEL it is met everywhere in open places sitting together in groups, apart of the society of the likewise com- 
mon Megalura, 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 that it also succumbs to metagenesis. We know 
specimens with fine reddish-brown. bands on the under surface, beside such with pale, faded colours as seen 
in ehrhardtt (108 a), thus showing the typical colouring of the dry season. The uppersurface is also subject to 
various modifications. Especially the extent of the reddish-brown submarginal band is most variable. It may 
either traverse both the wings as a series of coherent spots (completa), or be completely present only on the 
forewings (cova). Furthermore there are specimens with only 3 or 4 reddish-brown subapical spots (alala, prae- 
caria) and, finally, such without any reddish-brown maculae at all being replaced by white ones (albifida). 
The one white-speckled form is presumably 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. alala Hew., the typical form, without the reddish-brown submarginal band on the upper sur- 
face, comes from Venezuela, the white median zone sometimes relatively broad (alala), occasionally very narrow 
(titia form. nov.), the transcellular white small comma-spots always pregnant. — completa Fruhst. occurs in 
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- 
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 brightly beneath are lacking the ochreous band of the upper surface of the hindwings. — negra Fldr. is 
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 in titia as 
well as the subapical maculae of the forewings. The under surface of all the wings somewhat’ paler and more 
faded than in the form of the rainy period from Venezuela. — ehrhardti Newbgr. (108 a) was based upon speci- 
mens 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 period, with all the marks of the generation of, 
the rainless period. Several more 3g from Ecuador, in FRUHSTORFER’s collection, are just as brightly coloured 
and distinctly striped as the typical form from Venezuela. White median band only little broader than in 
specimens 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. 
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 ehrhardtv, 
white median band distally more extensively bordered in yellow. Pozuzzo (Peru). — albifida Pruhst. from 
Peru has a more extensively white median band than completa, the distal subapical row of 5 dots white instead 
of yellow, besides 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-form. — privigna subsp. (or form.) nov. is a form or race analogous to albifida, with considerably narrower 
white area on both the wings. Habitat presumably Peru or the Upper Amazon. — negrina subsp. nov. (108 a) 
is a form being common in many parts of Bolivia. Beside it a local race, fillo Fruhst., is found in Western Bolivia 
and Argentina, presumably 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 2 of negrina was discovered by Fasst in Bolivia. It is somewhat larger and of rounder wing-contours than 
the J, exhibiting somewhat more extensive reddish-yellow subapical maculae of the forewings. 
A. corcyra, from Colombia to Ecuador, occurring beside A. alala from which it differs by the 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. — coreyra 
Hew. (108 a) was set up by its author according to much smaller specimens than the one we present. The speci- 
mens also vary beneath according to the seasons and altitudes from a lighter colour to darker grey. Fassu 
found corcyra still at an altitude of 2200 m in the Eastern Cordilleras of Colombia. The small form as well as 
the large form are included in the so-called Bogota-consignments. — collina Hew., an excellent territorial form 
with considerably narrowed reddish-yellow submarginal band of the forewings and posteriorly reduced white 

*) Valve set with sharp spines, narrower and longer than in A. olynthia, clunicula, however, much broader and 
shorter, uncus more spadiceous instead of simply pointed as in olynthia. 
alala. 
titia. 
completa. 
praecaria. 
negra. 
ehrhardti. 
cord. 
albifida. 
privigna. 
negrina. 
Fillo. 
corcy?ra. 
collina. 
