THALASSODES. By L. B. Prout. 
13 
and in the very slender, lunulate-dentate postmedian line recalling an Iodis, but with the frenulum present 
and with the blackish face which is characteristic of several Gelasma. Palpus moderate, antennal pectinations 
very long. Kwanhsien, Szechuan, only the type $ known. 
G. lucia Th.-Mieg. Unknown to me and the type is lost .or mislaid. "23 mm.” Face black. Wings lucia. 
green, probably as in H. aestivaria, lines white, waved; cell-spots and proximal edging of postmedian line 
darker green. Forewing more rounded at apex than in H. aestivaria-, hindwing with the angle at the 3rd radial 
weak. Japan, 1 G-. in poor condition. 
G. immunis Prout (2 g). Also founded on a single faded <$, this may probably be synonymous with immunis. 
the preceding species, a possibility which I overlooked when I described it. Slightly smaller and without any 
dark edging to the postmedian line. Its most distinctive character is the very short pectination of the antenna; 
Thierry-Mieg gives no indication of this in his description. Takao-San, W. of Tokyo. 
G. dysgenes Prout (Vol. 12, pi. 12 f) is another black-faced species, but very much larger than immunis, dysgenes. 
with normal (long) pectinations, more angular grey-green wings and dark grey, whitish-tipped fringes. Vriana- 
tong, Tibet. 
G. glaucaria Walk. (Vol. 4, pi. 2 c). It is doubtful whether this species, in its typical form, has been glaucaria. 
found in any truly Palaearctic locality. Similar Szechuan Gelasma, unfortunately very difficult to obtain in 
good condition, are probably the following, which may possibly prove to be a local race of glaucaria. 
G. flagellaria Pouj. As this is said to have “rounded denticulations” in addition to the central angle flagellaria. 
of the hindwing, the previously given synonymy is incorrect (see albistrigata, below). If my present deter¬ 
mination is correct, flagellaria has somewhat less joints of the antenna pectinate than glaucaria-, other distinc¬ 
tions seem less constant. West (? and Central) China. 
G. albistrigata Warr. (3a). The true habitat of this species (Japan) was given in the corrigenda to albistrigata. 
Vol. 4 (p. 415), but the correction was incomplete, as doubts had not at that time arisen regarding the syno¬ 
nymy. As a matter of fact, I am not aware that this opaquer, greener and often larger Gelasma occurs in China. 
We give a figure which will assist in elucidating the species. 
G. saturatior sp. n. (2 h). Somewhat smaller than glaucaria, the antennal pectinations rather less long, saturatlor. 
the tail of the hindwing a little more pronounced, its termen otherwise only faintly undulate, certainly not 
denticulate. Ground-colour much more densely irrorated with grey-green than in glaucaria, the wings in conse¬ 
quence almost as dark as the band-like shades of glaucaria, with no indication of whitish strigulation, the 
whitish postmedian line not very conspicuous, its proximal dark shade very inconspicuous. Face reddish, per¬ 
haps a little brighter than in glaucaria. Ta-tsien-lu (type and allotype) and Tchang-kou, Chinese Tibet, in coll. 
Brit. Mus. 
G. brachysoma sp. n. (2 h) has about the size of saturatior, the wings at least as broad, the abdomen, brachy - 
on the other hand, remarkably short and slender. Further distinctions are the non-dilated hindtibia of the soma - 
<$, the pale yellowish-olive ground-colour and the almost straight postmedian line, particularly on the hind¬ 
wing; in the latter respect it recalls no other Gelasma excepting the round-liindwinged Indian convallata (Vol. 12, 
pi. 11 g), to which also the cell-marks perhaps relate it, being whitish, faintly dark-ringed, but extremely in¬ 
conspicuous. Forewing beneath with basal part of costal region strikingly differentiated in colour (more yellow 
and more opaque than the rest). Szechuan: Ta-tsien-lu, type and a paratype, both in the British Museum; 
Tu-pa-keo, 7400 feet, 1 Kunkala-Shan, 1 <$, this and the preceding in the Tring Museum. 
G. thetydaria Guen. (Vol. 12, pi. 11 h). Of this Indian species I have seen a pair from W. China, the thetydaria. 
$ from Che-tou, the $ from Moupin, both in poor condition, so that it is impossible to decide whether a sepa¬ 
rate race shoidd be founded on them. 
20a. Genus: Tlialsissodcs Guen. 
(see Vol. 12, p. 99 and Vol. 16, p. 21.) 
It was overlooked in Vol. 4 that one species of this very widely distributed Indo-Australian genus had 
been taken in Japan, though only (so far as I know) in two examples, see below. It is related to Gelasma, the 
pectinations of the $ antenna always long and weak, the 3rd joint of the $ palpus always moderate or elongate, 
but best distinguished by the cell of the hindwing, which is short anteriorly, much less so posteriorly, the 
discocellular being unusually oblique. See further Vol. 12, p. 99. 
Th. quadraria Guen. (Vol. 12, pi. 11 h). A $ from Yoshino (Yamato) and a smaller one from Kagoshima quadrarla. 
were collected by Mr. A. E. Wileman and erroneously recorded (Trans. Ent. Soc. Lond. 1911, p. 342) as ma- 
rinaria Guen. They appear to be duller and greyer-green than the type, but I think this is due to then age and 
condition; the weak angulation of the hindwing (but not the large size) suggests (form?) semihyalina Walk. (Vol. 12, 
p. 99). Dr. Wehrli has recently shown me a brighter ^ from Shanghai, as well as one from S. China (Canton). 
