4 
EUSCHIRROPTERUS; TUERTA. By Dr. M. Draudt. 
cosyra. 
peruviana. 
valkeri. 
poeyi. 
disci fera. 
klagesi. 
tucumana. 
fuscus. 
platensis. 
bolivar. 
insulica. 
hemicycla. 
yellow, dorsal and anal tuft black. The 2nd palpal joint, the frontal sides and the underside of the tridented, 
black frontal projection are white. The species was described from the United States (Arizona), but I received 
it also from Mexico (S. Luis Potosi). 
C. cosyra Drc. (la) is of the size of the preceding, the pattern of the colouring being similar, too; 
the forewing, however, is in the marginal and inner-marginal part light grey, instead of dark brown; the white 
longitudinal stripe runs more uniformly bent and at the margin there is a marginal line bordered with black 
in front of the lighter fringes. The hindwing is the same, chrome-yellow with a broad, blackish marginal band 
in which a fine, yellow undulate line extends close in front of the margin. Western Mexico. 
C. peruviana Drc., having remained unknown to me, is described to be brown, densely intermixed 
with grey hair on the body; abdomen yellow with a black basal hair-tuft. The light brown forewing shows 
dense, white and greenish dusting, two black postmedian zigzag-shaped transverse lines and in the cell a small 
brown spot; proximal margin brown, fringes speckled white. The hindwing is yellow with a black marginal 
band and grey-speckled fringes. The $ is somewhat darker. Expanse of wings: 52 mm. South East Peru, at 
an altitude of 6000 ft. 
2. Genus : Euscliirropterus Grt. 
This small genus is particularly interesting for its very conspicuous sexual dimorphism, although both 
sexes are not known hitherto of all the species; in the G6 the costal margin of the forewing is bulged out before 
the apex. The neuration is as in the other genera, but the upper radial on the forewing rises from the accessory 
cell, not from the upper cell-angle. The frontal projection is of a plain conic shape, the antennae particularly 
in the <$<$ are very much thickened before the apex, the tarsi very much haired and with bristly spines. 
E. valkeri Hmps. (1 b) is a smaller, chocolate-brown species very much haired and dusted greyish- 
white, with a white discal longitudinal stripe on the forewing; macidae dark; a dark postmedian transverse 
line extends to the proximal margin. Abdomen and hindwing yellow, the hindwing with a broad black marginal 
band and a yellow spot in it at the anal angle. Chile. 
E. poeyi Grt. (= disparilis H .-Schaff., argentata Drc.) (La) resembles valkeri in the $, though it is 
by far larger; in the the greater part of the wings is hyaline diaphanous, only in the inner-marginal half of 
the forewing there is brown colour and marking. Distributed from Mexico to Guatemala, also in Cuba, Jamaica 
and Hayti. 
E. discifera Hmps. (la) is closely allied to poeyi, but the disc of the forewing is yellow instead of 
white, the cell-spot round, not oblique, and the marginal band of the hindwing is much broader. Described 
from Brazil (Sa. Catharina). 
E. klagesi Jord. (1 e) is much smaller than discifera, with narrower wings and a much narrower 
marginal band of the hindwing, also paler colouring. Distributed from the Orinoco to Tucuman. — In the 
typical form the head is above purely white, the white area of the forewing extends to the base of the costal 
margin, the hindwing is of a very pale yellowish colour. Bolivar, in July. — The form tucumana Jord. is darker 
on its head and thorax, with broader wings. The white area of the forewing does not extend so far towards 
the base and is shaded with brown here, the hindwing of a deeper yellow with a broader marginal band. — fuscus 
Jord. has quite brown-dusted forewings, so that there only remain faint traces of the white colour. Tucuman 
(Argentina). 
3. Genus: Tuerta Wkr. 
Distinguished from the preceding genus by the posterior tarsi not being haired, and by the upper radial 
vein of the forewing rising from the upper cell-angle. The coniform frontal projection is in platensis extended 
to a point, not so in the other species. The sexes are not differently built and coloured. The abdomen has above 
rather long tufts. 
T. platensis Berg (1 b) looks almost exactly like E. poeyi-Q, but it is much smaller and originates from 
Argentina. — bolivar Jord. from the Orinoco District (Bolivar, June) has a prolonged cell-spot of the forewing and 
a less prominently black dorsal line on the abdomen. In Uruguay (typical) platensis flies in January and February. 
T. insulica Hmps. from Trinidad has a red-brown anterior body interspersed with white, the frons 
being white; abdomen yellow with brown dorsal tufts. The white forewing is densely dusted with red-brown 
except the area between and behind the maculae being pupilled silvery; an indistinct, red, oblique, antemedian 
transverse line; in the darker marginal area there are small spots dent at ed dark, intermixed with silvery scales, 
and a whitish border towards the margin. Hindwing yellow with a brown marginal band and white fringes. 
Expanse of wings: 36 mm. 
T. hemicycla Hmps. is somewhat similar, much smaller; the ground of the forewing is more 
olive, not white; the ring-shaped macula is bordered by a white semi-circle forming at the same 
time the interior margin of the reniform macula, the latter being outside bordered by an oblique 
white band; on the middle of the proximal margin there is a double red line inwardly scaled silvery; 
