52 
SAROSA. By Dr. M. Deaudt. 
suffumata. 
laennus. 
simplex. 
collocata. 
whitelyi. 
serra. 
enagrus. 
dexamene. 
almon. 
simulans. 
ignicolor. 
sesiiformis. 
A. suffumata spec. nov. (lie) is a species very easily recognizable by the uncommonly g^eat extent 
of the black colour. Body black; vertex, collar and the abdominal sides with metallic blue spots. The last 
abdominal segment and hind-margin of the penultimate segment brick-red; a sublateial row of yellow-red 
spots. Forehead, a spot below the collar and forehips white. The black forewings exhibit hyaline spots in and 
below the cell, between the middle radial and lower median vein, and a small, narrow spot lies between the 
upper radial and the lowest subcostal vein The black hindwings are hyaline in the cell, behind and below it. 
Described according to 1 $ from East Colombia (Medina, 500 m, A. H. Fassl). 
A. laennus Wkr. (11 e). Black, antennae at the tips white; on the shoulder a white spot. Vertex, collar 
and subdorsal spots on the 4 first abdominal rings metallic blue, the last 3 segments red, frequently with black 
dorsal spots. Wings hyaline with black veins, broad margins and discoidal spots; the middle spot of the hindwing 
is confluent with a triangular widening of the margin towards the proximal margin. Forehips in the $ black, 
in the $ like the large ventral valve white. From Brazil (Rio de Janeiro, Santos), \ery common. 
A. simplex Wkr. (11 cl) entirely resembles the following species, but the last 5 abdominal rings are 
red-margined and the last segment is quite orange-red, besides there are sublateral white spots. Hampson 
presumes in the species before us the $ of collocata. Amazon District (Para). 
A. collocata Wkr. (11 e). Head, thorax and abdomen are black; collar spotted in a metallic blue; spots 
on the shoulders, the hips at the sides of the metathorax are white. The abdomen shows subdorsal rows of 
metallic green spots; the last 2 segments are orange-curled. The ventral valve is white-margined and the 6th 
and 7th segments show on the ventral side a large, red-yellow spot. The wings as in the allies. From the Amazon 
District (Ega). 
A. whitelyi Druce (lie) from Peru has a black body; vertex and collar are blue-spotted; at the sides of the 
forehead, on the shoulders and thorax there are white dots; the forehips are white. The first abdominal ring 
is above yellowish-white, the other segments exhibit dorsal and lateral rows of blue spots, as well as lateral 
red articular indentations, the 4 middle segments besides sublateral white spots. The hyaline wings with very 
broad, black distal margins do not exhibit any peculiarities. 
A. serra Schaus. Head, thorax and abdomen black. Hind thorax and hips white-spotted; the abdomen 
shows lateral rows of metallic-blue spots, on the 4 middle segments between them carmine spots. Wings as 
in the allied species. Brazil (Rio de Janeiro). 
A. enagrus Cr. (11 e) is distinguished by the absence of every red colour. The black abdomen shows 
dorsal and subdorsal metallic blue-green macular stripes; shoulders and thoracic sides white-spotted, forehips 
white; vertex and collar are spotted in a bluish green. — f. dexamene Druce shows at the first abdominal ring 
lateral white spots. Surinam; Amazon (Ega; Sao Paulo). 
A. almon Cr. is unmistakable by the golden-green colouring of the abdomen; the body is black, on 
the collar green-spotted; the abdomen shows two very broad, golden-green subdorsal stripes beginning from 
the 3rd ring; also at the inner-marginal base of the forewing there is a green spot. The wings are hyaline with 
very broad black margins. Surinam. The species resembles the Ixylasia semivitreata figured on t. lie. 
A. simulans Druce has quite black wings; on the forewings only the cell and a stripe below it are 
hyaline, on the hindwings the base. The body is black, the sides of the abdomen green and the base white. 
Expanse of wings: 40 mm. Cayenne. 
15. Genus: Sarosa Wkr. 
Exteriorly looking like Cosmosoma, distinguished by the woolly hairing of the thorax, in the veins 
there is no essential difference. Palpi erect. Single species also resemble Isanthrene from which, apart from 
the woolly thorax, they differ by the non-thickened antennae. 
S. ignicolor Men. (11 f). Head and thorax black-brown, shoulders pink-spotted; collar and shoulder- 
covers with white dots. The first abdominal ring is above pink, the 3 last ones orange-red, the others black- 
brown. The hyaline forewings are at the base pink, veins, margins, middle-spot and apical spot are black; 
on the hindwings the base and the submedian fold are likewise pink, the margin and apical spot, black. The 
position of this species, not having been found again, remains uncertain. Expanse of wings: 42 mm. Described 
from Brazil (Minas Geraes). 
S. sesiiformis Wkr. has like the preceding an entirely woolly haired abdomen. The body is black; 
spots on the forehead, thorax and first abdominal ring, as well as bands on the others are olive-yellow; thoracic 
sides and legs are spotted in a metallic blue, of the same colour are subdorsal and sublateral macular series 
at the abdomen; tarsi at the ends orange. The wings are hyaline with black margins, veins and internerval 
streaks in the marginal area. Expanse of wings: 40 mm. Venezuela. 
