ATYRIA. By L. B. Prout . 
125 
and still narrower, the hindwing with only the borders blackened, that of the abdominal margin ending in a 
point before reaching the base, that of the costa beneath confined to the distal third; a few dark scales on the 
medians suggest remnants of the longitudinal mark of the basina hindwing. 
A. durnfordi Druce (17 i). Easily recognized by the form of the yellow markings of the forewing and durnfordi. 
the broad, complete longitudinal streak of the hindwing. Generally smaller than the rest of the similar species. 
A southern form, known from Argentina, Paraguay and Brazil. The type was sent to Druce from Buenos 
Aires, but I have no knowledge of further material from so far south. — ab. loc. (?) attenuata Warr., from attenuata. 
Sao Paulo, has the outer yellow band of the forewing less narrow and rather straight-edged, the longitudinal 
streak of the hindwing in the type tapering posteriorly, in one aberration not quite reaching the black border. 
Specimens, from Nivac, Matto Grosso, show more resemblance to this form than to the name-type. 
A. triradiata sp. n. (17 i). 37 mm. Dusky brown (perhaps blacker when quite fresh), the markings triradiata. 
apricot yellow inclining towards yellow ochre; spots on outerside of coxae and a lateral stripe on abdomen 
ochre. Forewing with a submedian streak, pointed at both ends, its proximal point between the bases of 
median and 2nd submedian, its distal on the fold 4 mm from termen; a slightly sinuate, oblique transverse 
band just outside the cell, 2—2,5 mm wide, from costal to within 2 mm of midtermen. Hindwing with divari¬ 
cating streaks on the two folds (not quite reaching base or apex), the anterior commencing as a point and 
widening, the posterior almost uniformly about 1 mm wide, except at its extreme base; costa narrowly yellow 
proximally, especially beneath. Near Ambato, Ecuador (R. P. Irenee Blanc), 1 $ in the British Museum. 
A. quadriradiata Weym. (16 k). Still more divergent in that even the second band of the forewing is quadriradia- 
almost longitudinal; the shortened hindwing may shows some relationship to vespertina; colour similar, or even ta - 
more tinged with reddish. The unique type is a $, from the primaeval forest of Pozuelos, not far from Babahoyo 
(W. of Riobamba). 
A. subdichroa Dogn. (17 i). “28 to 31 mm.” The yellow colour deep (in the rather small specimens subdichroa. 
from the Peruvian Amazons which I provisionally refer here almost orange), the markings much as in durn¬ 
fordi, but with the black longitudinal streak of the hindwing at the 2nd median. Face black (in durnfordi and 
dichroides predominantly whitish). “Thorax with a yellow central line" (Dognin). Abdomen beneath white, 
laterally with a yellow line ( dichroides has also a black line between the yellow and the white). Pectinations 
very short (Dognin calls them crenulations, but in the above-mentioned specimens, as in dichroides, true pec¬ 
tinations are certainly present). The originals were 4 SS from S. Ecuador (Loja and Numbala River). 
A. dichroides Prout (= dichroa part., auct., nee Perty) (17 i). Outer patch of forewing less narrow dichroides. 
than in subdichroa , proximal patch on the whole more elongate; for some further distinctions, see above. Peru 
and Bolivia. The type was purchased as from “S. Brazil” but I now suspect this to have been a dealer’s error. 
It differs from dicliroa. as figured and described, in its smaller size, the shape of the markings and probably 
the short palpus. 
A. sciaulax sp. n. (= dichroa part., auct., nec Perty) (17 k). Size of dichroa, but apparently more sciaulax. 
slenderly built, the $ abdomen elongate, beneath dirty whitish in its posterior part. Colouring of body other¬ 
wise about as in dichroa; outer spot of forewing differently shaped, longitudinal streak of hindwing shaped 
more as in matutina. The underside, which in dichroa is said to be like the upper, distinctive: hindwing with 
yellow costal streak well developed, anterior and longitudinal stripes united by dark shading as far as the end 
of the cell, a further dark streak running along and in front of the fold, so that of the yellow ground-colour 
there remain only the broad curved spot from the discocellulars outward, a small isolated subterminal spot 
on the 2nd median and a thick line from base in front of the fold, dying out before termen. Bolivia, the type 
S from Cochabamba (P. Germain) and a second from “N. side of the Cordillera de Cochabamba”, both in the 
British Museum; another with good data in the Tring Museum (Charaplava, Simons); other <$<$ from Germain 
only labelled "Bolivia”, but probably topotypical. 
A. malanciata Strand, a from “Malankiata” (sic), Peru, differs from matutina in its longer abdomen, malanciata. 
in the lack of the projecting dark mark on the 1st median in the yellow spot (but this is inconstant in matu¬ 
tina) and especially in the lanceolate streak of the hindwing, with its end not reaching the black border, only 
connected therewith by irroration along the 2nd median; the antenna “seems a little thinner” and the anal 
tuft more expanded beneath than above (in matutina vice versa). I have hitherto endeavoured to fit this de¬ 
scription to aberrations of matutina with the black streak tapering distally, but the length of the abdomen 
points rather to a near relative of sciaulax; if the forewing agrees in shape with that, and the costa of the 
hindwing in colour, the two might even be races of one species. 
A. dichroa Perty (16 k) is unknown to me and may be, as I formerly supposed, an aberration of Cyllo- dichroa. 
poda claudicula but the type $ came from the Rio Negro (Amazons), which is outside the known range of that 
