112 
SOMADASYS; ERIOGASTER. By M. Gaede. 
albo- 
marginata. 
calberlae. 
tenera. 
daisensis. 
kibunen¬ 
sis. 
yatsuga¬ 
dakensis. 
takamukui. 
aavasaksae. 
rufomar- 
ginata. 
variegata. 
catacoides. 
dark race, similar to lydiae Krul. dealt with in Vol. 2, p. 153, hut the collar is still light coloured and fringes 
checked. The inner pale line on forewings is absent and the outer one is faint and not dentate. — Of albo- 
marginata Heyne (9 c) already discussed in Vol. 2, p. 153, we are now giving an illustration. — calberlae Bag. 
(i. 1.?) (9 c) differs from canensis (Vol. 2, p. 153) by the undulate shape of the outer line which is approx¬ 
imately parallel to the characteristic pale submarginal line. The light marginal area is much more sharply 
defined against the dark central area. Giogenti. Erom the Pungeler collection. 
P. tenera 0. B.-H. (9 c) is approximately the same in colouration as populi. The lines of forewings 
are faint. The inner one slightly bent, the outer one fairly straight, bending round at its end and bolder there. 
On hindwings the faintly developed outer band is as in populi. Fringes of both wings are checked. Sutshansk. 
Genus: JSomacIasys gen. nov. 
I am utilising this name for a number of species which are described by Matsumura as Eriogaster 
and of which also Pungeler had classified a specimen under the latter name. Whether Odon. brevivenis, dealt 
with in Vol. 2, p. 170, pi. 27 f belongs here, I cannot say, but I consider it likely. Palpi and antennae as in 
Eriogaster. Body of more elongate, forewings more pointed. Veins 3 and 4 arising almost from a spot, 8 + 7 
+ 6 stalked, of which 8 branches off from before the middle of the stalk of 6 + 7. 9 + 10 with very long stalk, 
11 being near 12 throughout its course. On hindwings 4 + 5 stalked, 7 + 8 stalked arising from accessory 
cell, which at base has a bold spur projecting towards costa. 
The 4 species described by Matsumura are so similar that they are perhaps subforms of a single species. 
S. daisensis Mats, is similar to Odon. brevivenis Btlr. (Vol. 2, pi. 27 f). Ground colour buff-brown. The 
silvery spot on forewings is larger, round, extended somewhat anteriorly. The outwardly dentate inner line 
almost touches it. The outer and submarginal lines are straight, almost parallel to the outer margin, the former 
nearer to the silvery spot than in brevivenis. Hindwings buff, devoid of markings. $ with dark yellow fore- 
wings. Hindwings pale chestnut brown. 40—46 mm. Honsho. 
S. kibunensis Mats. (9 e) is similar to the previous species but the ground colour of forewings of $ is 
chestnut-brown, being somewhat paler at the base. The inner line is somewhat moie rounded off. The outer 
line is about parallel with the outer margin, slightly depressed above vein 5. The submarginal line is also parallel 
and excurved below the costa. Both lines are widely separated throughout their entire length. Hindwings 
somewhat paler than fore wings with 2 very indistinct dark bands, which are absent in the original illustration. 
3 36 mm. Honsho. In the specimen illustrated from Ta-tsien-lu, which is in the British Museum, the silvery 
spot is very small. I presume that same is identical with kibunensis. 
S. yatsugadakensis Mats. (9 e). Also similar to daisensis. Forewings grey-yellow, golden yellow at base 
and inner margin. The silvery spot large, disco-cellular nervure black-brown. The lines are not described. The 
outer one somewhat more incurved towards the inner margin. The submarginal line slightly bent in above 
vein 5, thereby approaching the outer line at costa. Hindwings pale yellow-red with 2 indistinct dark bands. 
For illustrative purposes a specimen ex the Pungeler collection from Shoji has been chosen which is designat¬ 
ed argenteomaculatus Btlr. I do not know an original description for this denomination. A second specimen 
from Nikko is somewhat more reddish, but the silvery spot is also large. The outer line appears to be somewhat 
more oblique, so that at costa it is still nearer to the submarginal line than is shown on the illustration and at 
inner margin it is nearer the inner line. On hindwings no dark band is visible on upperside. 
S. takamukui Mats. Ground colour as in yatsugadakensis but the inner line is more strongly angulated 
and extends to the small silvery spot. Hindwings without dark band. $ 38 mm. Kyushyu. From the rather 
imperfect illustration of Matsumura, I should consider this a colour variation of daisensis. 
5. Genus: Eriogaster Germ. 
E. lanestris L. (Vol. 2, p. 154, pi. 24 li). — The Lapland form aavasaksae Teich is greyer than type, 
the outer line indistinct, formed apparently of spots. The outer margin of both wings grey-white, fringes with 
white spots, in $ also the hindwings similarly. On forewings the costa, especially at apex is white. — We are 
illustrating arbusculae Err. (9 f). It is now deemed to be a separate species. The band of forewings in same 
ends vertically at inner margin whilst in lanestris it is more inclined to be obliquely inwards there. — A S in 
which the outer margin of forewings is brown like in the $ and not grey, is named rufoniarginata Gloss. 
In contrast $9 with a more distinct grey marginal area are named variegata Lenz. In same the grey colour 
penetrates into the central area. 
E. catacoides Strd. Colouration and markings as in catax L., but somewhat darker. In catax 3 the 
forewing has 2 very diffuse dark transverse lines whilst here they are fine and fairly sharply marked. Central 
area and marginal area equally wide. The outer line is somewhat undulate and incurved at costa. The white 
central spot is more faintly edged with black, q 32 mm. Japan (l), Foimosa. 
