ARSILONCHE; ACRONYCTA. By Dr. M. Drattdt. 
cell above the median nervure an interrupted red-brown streak; along the submedian a whitish longitudinal 
streak from base to beyond the first third of the wing; from the apex a white streak extends obliquely to the 
angle of the cell; there are white internerval streaks in the subterminal; fringes grey intersected with brown. 
Hindwings brown, base whitish, dark nervures and white fringes. Thorax pale grey, abdomen white. Wing 
expanse 33 mm. Gafsa (Tunis) in November. This species is unknown to me, according to the description it 
might be a Guculliane something like Metlaouia oberthuri. 
S. nervosa F. — ab. rubrobrunnea Bird, is a variety occurring probably everywhere in palaearctic rubro- 
territory having the white forewings more or less suffused with red-brown; also the hindwings are red-brown hl 1,11,11 "■ 
along the median and reddish-brown beyond the cell. — ab. atrata Belling has quite black forewings from base airata. 
to beyond the middle, from there to the apex paler ochreous, veins lighter outlined with grey towards the 
margin contrasting with the dark ground. Hindwings deep grey. Bred from larvae from near Berlin. — subsp. 
argentea Splr. from the Altai is somewhat larger on the average and a purer white especially on hindwings. — argentea. 
expressa B.-Haas are specimens with a slightly more bluish grey-white colouration with a sharper and purer white expressa. 
or whitish-yellow basal streak and a similar mark from the disco-celluar nervure to the margin. Hindwings 
are black with pure white fringes. From Karagai-Tau and the Juldus region. 
S. splendida Stgr. — ab. allbicilia Bird, has the hindwings suffused with brown but with a white margin splendida. 
and similar fringes. Turkestan, Siberia, Corea, Thibet. This form is represented by the illustration inVol. Ill, a/l>irilia - 
2 e; we are illustrating the name type therefore in this volume (1 d). 
S. sincera Warr. is pure white on forewings, veins outlined in very pale grey on both sides, sprinkled sincera. 
finely with black on the inner marginal half of the wing, more sparsely sprinkled in the upper half; a distinct 
black spot at the lower end of cell. Hindwings and fringes pure white. Underside white, forewings faintly 
tinged with grey. Body white, head and prothorax faintly tinted grey. Shaft of antennae white, pectinations 
rusty brown. According to a single $ from Baigacum (Syr Daria), caught in June. 
12. Genus: Arsilonclie Led. 
A. albovenosa Goeze. — The name: degener Hbn. can no longer be considered synonymous and should degener. 
be now utilised for the somewhat smaller autumn generation with very pronounced longitudinal streaks on 
forewings. — ab. neomelaina Traub is a melanic form. Head and dorsum black-brown. Forewings coffee- neomelaina. 
brown almost black, veins light grey, base of wings grey; hindwings grey-brown blackened towards the margin, 
abdomen black-brown. This may probably be described as a melanic form due to an industrial environment 
because a number of the form were bred from larvae which Were obtained in the neighbourhood of Neustadt a. d. 
Hardt and the contaminated creeks in the surroundings. — ab. tristis B.-Haas is a darker form of ab. centri- iristis. 
puncfa with the grey-brownish ground colour of S. nervosa but darker and more unicoloured; it differs from cenlri- 
the ab. murina Auriv. from Sweden and Finland in that the veins are not powdered with white. From S. Russia puncla. 
(Gov. Saratov). — subsp. tanaica Alph. is described as the more frequent form of centripuncta which is disting- ianaica. 
uishable by a dark brown longitudinal streak on the fore wings which commences at the base and extends in the 
direction of the black discoidal spot, not rarely this expands widely which gives the insect a most pronounced 
character. It occurs in the entire district around the Sea of Azov. — subsp. cretacea Wagn. (1 b) is a recently creincea. 
described form from Anatolia with chalky white ground colour with minute dark scales distributed over the 
surface and with sharp black marginal spots. The longitudinal streaks contrast sharply from the dark ground 
colour. HindAvings and underside are also a purer white without the yellowish tone of the name form. — albo¬ 
venosa is widely distributed in the East as far as Japan and Saghalin. 
A. saepestriata Alph. is omitted by Warren. It resembles albovenosa and especially the v. murina saepesiriata. 
of same but it differs by the monotonous grey-brown hindwings. In murina the white veins on fore wings stand 
out from the brown ground but in the present species on the other hand straight bronze-broAVn inter¬ 
nerval stripes appear on a white ground. Described from a single $ of 34 mm wing expanse from Urga in 
northern Mongolia. 
14. Genus : Acronycta Tr. 
This genus requires to be brought up to date. At present we do not consider the separation of the 
Chamaepora Warr. as justified as it was based solely upon differences in the larvae and of the 60 known 
Acronyctae so far all in all only 12 of the larvae are known, so that it would be impossible at present to assert 
whether the remaining species belong to this or another genus. 
On the other hand instead of Chamaepora we must introduce the old genus Craniophora Snell, which 
can be well separated from Acronycta and differs by a complete row of abdominal tufts, Avliilst Acronycta only 
has a basal tuft; the thorax in the latter is quite free of tufts whilst Craniophora has a separated tuft on the 
