LYCANIDA. PARAGERYDUS. 25 
621. Gerydus croton, Doherty. 
G. croton, Doherty, Journ. A. S. B., vol. lviii, pt. 2, p. (1889). 
Hasirat : Tenasserim Valley, Tavoy District, Burma. 
EXPANSE: @, 1°80; 9, 1°75 inches. 
DESCRIPTION : ‘‘ MALE, UPPERSIDE, doth wings dark brown. Forewing with the apical 
part black, an obscure fuliginous-whitish [pale ochreous] band extending obliquely from beyond 
the end of the cell to the second median nervule two-thirds from ils origin, two obscure 
whitish spots beyond and below it, one on each side of the first median nervule, the lower 
spot sometimes obsolete. UNDERSIDE, doth wings very dark, variegated with many shades of 
brown. Forewing with the band of the upperside dull ochreous, broad and well-marked, 
the upper of the two spots large and but slightly separated from the band, and the lower one 
very small, oblique and distinct ; there are some costal markings, a subapical cordate spot, 
and three submarginal blackish dots, Aiding has the basal half very dark, with some 
paler brown tranverse markings edged with dark, a blackish semi-circular band, with a slight 
bluish gloss, extending across the wing beyond the cell, after which comes a semi-circle of 
joined cordate reddish-brown maculz, beyond which the ground is again dark, with a light 
brown marginal band near the apex. FEMALE. UPPERSIDE, forewing with the band more 
distinct and nearly white, extending obliquely almost to the costa and to.the second median 
nervule two-thirds from its origin, the upper of the two spots separated from it only by the 
vein, the lower spot smaller and more isolated. UNDERSIDE, Goth wings much lighter and 
more variegated thanin the male. Forewing with the dark submarginal dots forming a complete 
series. Hindwing with the outer part pale brown, except a large sordid area developed round 
the third median nervule as centre.” 
“The inner angle of the forewing is in this species somewhat less produced inferiorly than 
in G. ancon, Doherty. The hindwing of the female is somewhat more angled in the middle. 
In the male the third median nervule of the forewing is not swollen, The prehensores differ 
but slightly in the two species,” (Doherty, 1. c.) 
Mr. Doherty obtained two males and a female of this species in the Tenasserim Valley. He 
notes that, like G. ancon, it “ has a strong irregular flight (quite different from the feeble, un- 
certain motions of the Paragerydi and Loganias), wheeling many times round the same 
circle or up and down a certain length of the path, and would be difficult to catch but for 
its habit of returning again and again to the same leaf.” 
Another very distinct species of this genus occurs in the Malay Peninsula, and is described 
below.* The male has a broad pure white discal band on the upperside of the forewing, 
all the markings of the underside very clearly defined, The female is unknown, 
Genus 96.—Paragorydus, Distant. (PLATE XXVI.) 
Paragerydus, Distant, Rhop. Malay., p. 207, woodcut mn. 60, posterior leg of Parugerydus horsfieldi, 
(1884); p. 451 (1886). 
“ Closely allied to Gerydus, Boisduval, but differing by having the first joint of the tarsi 
greatly elongated, but not widened and compressed as in Gerydus; the femate also differs 
from the male in having the outer margin of the hindwing dentately sinuate. ” Eyes naked. 
“The position of Pavagerydus is readily defined as allied to Gerydus and Zogania, Distant, 
Se a ek a a a 
* Gerydus gopara, n. sp. Hanrrat: Perak, Malay Peninsula. ExpansE: Male, 1'55 inches. Des- 
CRIPTION: MALE. UppersipE, doth wings dark brown. Forewing with the apical half still darker brown ; 
the disc crossed by a very regular broad pure white band, commencing at the subcostal nervure, ending in the 
middle of the submedian interspace, its inner edge short and straight, its outer edge about twice as long and 
convex. AHindwing unmarked. UNDERSIDE, doth wings pale purplish-brown. orewiz7g with the discal band 
as above, but much less prominent, its edges irregular, marked with a prominent spot at its lower outer angle ; 
two spots across the middle of the cell, the outer the larger, another closing the cell, three spots on the costa, a 
subapical catenulated band of five spots—all these spots a little darker than the ground-colour, outwardly de- 
fined by a very fine grey line; a regular marginal series of short blackish lines between the veins. “indzving 
crossed by several catenulated bands, and the marginal linear spots as in the forewing. 
This species appears to be very distinct, and has no very near ally. It differs from G. symethus, Cramer, 
and G. éiggsii, Distant, in having all the markings clear and well-defined on the underside even more distinct 
than in G. doisduvali, Moore, instead of much blurred and indistinct as in the two former species, In the well- 
defined regular pure white band of the forewing on the upperside it differs from all, 
4 
