124 
ATYRIA. By L. B. Prout. 
at the base, broadens gradually and fuses with a broad distal border, succeeded by a still broader costal one 
this latter invades the entire cell and projects two rays (on veins 2 and 3) which run to the distal border” 
(Dognin abridged). Hillapani, Peru, l in fresh condition. Dognin suspects that it will prove variable. 
alb i fro ns. A. albifrons Prout (17 h). Closely like C. postica, but with shorter pectinations (scarcely over twice 
diameter of shaft), face white, tegula black. Hindwing with an extremely fine black hindmarginal edge, the 
distal border very regular and constant (2—2.5 mm wide), the outer yellow patch of the fore wing with a. 
characteristic form. “Peru”, without exact locality, only $$ known. 
quicha. A. quiclia Schaus (16 k). Palpus and $ pectinations short, the latter scarcely twice the diameter of 
the shaft. Generally smaller than isis, the black borders reduced, especially that of the hindwing subcostally., 
Face only in its lower part white (one-half or rather less). “Peru”, again not localized. 
isis. A. isis Hbn. (= approximans Walt.) (17 h). Generally a moderately large species, with the black 
borders almost complete on both wings, though in varying extent, the anterior band of the hindwing always 
leaving a yellow border in front of the costal vein, from base to much beyond middle. Pectinations short, 
the tufts of cilia at their tips very short. Abdomen beneath white in the <$, blackish in the $. Brazil (Bahia 
southward, notably in the Rio Janeiro region) and Paraguay are well-known localities; also, according to 
Burmeister, the northern provinces of the Argentine. Typical specimens in the Tring Museum from “Popayan” 
(1 df 5 $$) are open to suspicion in view of the same labelling on another Brazilian species (see Oncopus trans - 
bocta. pecta, below). — ab. boeta Mabilde. Borders of hindwing broadened, longitudinal streak of forewing truncate 
at its distal extremity. Porto Alegre, recognizably though crudely figured without a cited authorship, thus 
in effect as a new species, though I have some unpublished evidence that it was probably a misreading of laeta 
(Walk.) , between which and isis some inexplicable confusion at one time prevailed (see under Micropos above). 
alegrensis. — alegrensis Strand, also from Porto Alegre (1 $), is presumably a further aberration of isis, but was published 
as a variety (? race) of quicha; palpus long (in isis $ it is at least somewhat longer than in isis <$), abdome n 
not yellow laterally, yellow area of hindwing distally not concave (between 3rd radial and 1st 
median), costal black border as strongly developed as hind border; rather larger than typical quicha (length 
of a forewing 19 mm). 
dabia. A. dubia Schaus (= isis Prout olira, err. det.) (17 h) differs from true isis, of which I have been inclined 
to suppose it a form, in the lack of the yellow costal streak of the hindwing, which is merely indicated by a 
small mark at the extreme base. On an average the black border of the hindwing is narrower. Venation more 
variable, the 5th subcostal or the 1st radial, at times both, strongly inclined to arise from the areole. Best 
known from the provinces of Rio Janeiro and Santa Catharina; type from Corcovado, where isis also occurs. 
stenochora. A. stenochora Prout (= approximans Walk., part., err. det.) (17 h). Evidently near dubia, but readily 
distinguishable, notably by the venation: forewing with areole exceptionally narrow, sometimes almost sup¬ 
pressed, discocellulars oblique and bent, 2nd radial arising near (sometimes close to) the 3rd. B with antenna 
shortly ciliated, hindleg very short and slender, tibia with a pencil and 1 long spur. Proximal yellow patch 
of forewing narrower, confined between median and 2nd submedian. Underside of abdomen with a longitudinal 
white line; of forewing with a yellow streak in proximal part of cell; of hindwing with no yellow at base of 
costa. S. E. Brazil, founded on a $ from Minas Geraes and 2 without locality; a in the Oxford Museum, 
from Espiritu Santo, agrees perfectly. 
chibcha. A. chibcha Schaus (17 h). A smaller species, with the proximal part of the costa of the hindwing more 
broadly yellow. The distal border of the hindwing in the B, which on the upperside narrows near the anal 
angle, suddenly becomes pale yellow towards the fold on the underside. Distributed from Peru (the type 
locality) to Argentina and S. E. Brazil. This must, according to the structural characters and the given range, 
tenuis, be the “ osiris Cram.’' of Burmeister, though it is a somewhat surprising misidentification. — ab. tenuis 
Warr. Dark subcostal band of hindwing reduced to a slight streak at base of cell, distal border also narrowed, 
especially at its extremities. Intermediates occur. 
basina. A. basina Bsd., given as from Guatemala (certainly in error) and Venezuela (very probably in error), 
is almost certainly merely bleached castina. His “Venezuela” $ is extant and is unusually large, though only 
a very little larger than the extreme known elsewhere (a q from Patino Cue, expanding 37 mm). It is just 
castina. possible, therefore, that there is really a larger race in Venezuela. — castina Bsd. (= semidivisa Warr., eion 
Druce, cuneifera Warr., dentigera Stgr., MS.) (17 i). Differs from chibcha chiefly in the black prong between 
the median branches of the hindwing; $ pectinations I think rather longer. Known range: Cuzco to Goyaz 
and southward to Entre Rios, Argentina. 
gracillima. A. gracillima Warr., a $ from Sapucay, Paraguay, expanding 27 mm, has approximately the same 
forewing markings as durnfordi, but of a much paler yellow, the outer transverse streak of the forewing shorter 
