GYRTONA. By M. Gaede. 
381 
at the apex. There are no tufts on the thorax, but a few in the middle of the abdominal dorsum. The difference 
is thus scarcely discernible indeed. Type: proximalis Wlcr. from Borneo and Malacca; all the species except 
one African are Indian. 
G. arcuata Hmps. (35 h). Forewing greyish brown. A blackish band at the base. The maculae indi- armala. 
cated by a few fine dots. A few fine dark transverse lines and rows of dots, excurved above the middle. A. few 
dark spots at the inner margin in the exterior part. The $ shows a somewhat more distinct marking. Hind¬ 
wing pale brown. 25—28 mm. North India, Malacca, Tonkin. 
G. cristipennis Hmps. (35 h) has uncommonly long palpi. Forewing lilac white, brownish ochreous cristipennis. 
from the base to the centre of the inner margin and at the costal margin almost to the apex, brown at the 
middle of the costal margin. Interior line finely silvery white, edged with dark, almost vertical, an oblique 
silvery streak extends to it inside from the costal margin. Reniform macula laterally with white streaks. Median 
line blackish, extra-angular as far as the reniform macula, then quite indistinct inward. Exterior line black, 
dentate, extinct below vein 4, white behind it at the costal margin. Submarginal line finely white, with a 
black dot at the apex. Hindwing whitish hyaline, brown at the margin. 24 mm. 2 $$ from Assam. 
G. lophota Trnr. Forewing red-brown, somewhat yellowish white at the base. Interior line threefold, lophota. 
blackish, undulate, a black stripe behind it with erect scales. A yellowish white band extends from the middle 
of the costal margin obliquely outward to the exterior line at vein 2. Traces of an oblique undulate median 
line. Reniform macula edged by black dots. Exterior line also threefold, oblique, introangular at vein 2. Apical 
area darker brown. Submarginal line finely white. Hindwing brownish white in the basal area, darker at the 
margin. 20—24 mm. Described according to 2 couples from Queensland. 
G. inclusalis Wkr. The S of this species has a spot of scales above vein 1 near the base of the brownish inclusalis. 
white forewing. Interior line black, incurved below the cell. A blackish spot before it at the costal margin 
and a large one in and below the cell behind it. Median line blackish, close behind the spot, slightly incurved. 
Reniform macula finely edged with brown, with black scales inside. Exterior line indistinct, double, undulate. 
The whitish submarginal line edged with brown outside. Hindwing dark brown. 22 mm. A few SS from 
Singapore and Borneo. 
G. semicarbonalis Wkr. (= rotundalis Wkr., angusta Pagst.). Forewing greyish brown with a silvery 
gloss. Interior line double, somewhat oblique, with black scales outside in and below the cell. Median line 
dark. Reniform macula edged with dark brown, with black scales inside. Exterior line indistinct, double. 
Submarginal line grey, edged with dark brown. Hindwing dark brown, lighter at the base. The species is 
divided into 7 forms: — 1. spilalis Wkr. Forewing with a black spot behind the interior line. — 2. phycisoides 
Mr. has besides such a spot also behind the median band, both near the inner margin. — 3. dorsobimaculata 
Strd. Forewing with another white spot behind the black spot of the interior line. — 4. dorsomaculata Strd. 
The white spot is present, the black one absent. — 5. diffusistriga Strd. A diffuse brown stripe at the median 
vein and further to the margin. — 6. In this — the typical — form the basal area is blackish as far as the 
middle. — 7. thoracica Wkr. (35 h) is the same in the basal area, whitish in the marginal area, except at the 
anal angle. 20—22 mm. Ceylon, Malacca, Borneo, New Guinea. 
semicarbo¬ 
nalis. 
spilalis. 
phycisoides. 
dorsobimacu¬ 
lata. 
dorsomacu¬ 
lata. 
diffusistriga. 
thoracica. 
G. acisalis Wkr. (35 i). Forewing reddish brown with a lilac reflection, the marking quite indistinct, acisalis. 
Interior and exterior lines double, the median line also indistinct. Reniform macula inside with black and 
red-brown scales. Submarginal line indistinct, double. Hindwing brownish. 22—25 mm. A few 3$ known 
from Ceylon and Singapore. 
G. niveivitta Swh. (35 k) is the only somewhat better marked species. Forewing brown with a slight niveivitta. 
lilac gloss, with a white radial band below the costal margin, somewhat diffuse below. Interior line double, 
from the cell to the inner margin. Median line bent, interrupted by the white band. Reniform macula white, 
incompletely edged with dark. Exterior line double, excurved behind the cell, then obliquely inward, another 
parallel line behind it. Submarginal line white, edged with black outside. Hinclwing brown with a lilac gloss. 
20 mm. A few S3 from Malacca and Borneo. 
G. ferriceps Hmps. (35 k). Forewing rusty red with a very insignificant marking. A double median ferriceps. 
and exterior line scarcely discernible, the whitish submarginal line also quite indistinct. The most distinct of 
all is a dark spot at the cross-vein with a grey centre. Hindwing dark brown. 22 mm. Only 1 $ known from 
Rangoon. 
G. hylusalis Wkr. (35 i) which is not very variable has nevertheless received many other denominations hylusalis. 
by Walker: nigrocinerea, dorsifascialis, strenualis, monilialis, demptella. Forewing dark red-brown with a 
silvery grey reflection. Interior line double, filled with grey, widely excurved in front, with black scales out¬ 
side in and below the cell. Reniform macula remarkably large, round, finely edged with dark, with a dark 
centre. Exterior line of black scales, edged with white inside, parallel to the distal margin. Submarginal line 
white, dark outside. Hindwing dark brown. 20—22 mm. Travancore, Ceylon. 
