EUXOA. By Dr. A. Corti. 
60 
the basal area. Subterminal line is absent, sagittate marks faintly indicated here and there. Hindwings uni¬ 
formly mouse-grey, discal spot barely visible, a mere indication of a band. Underside of wings unicoloured grey, 
sometimes with very pronounced arched stripe. Hindwings with dark central spot. Early stages unknown. 
Labrador, Gieenland, Canada, North America. 
E. dissona Msclnlr. (4 h §) according to Hampson = rara Pack. Forewings pale blue-grey, no dark dissona. 
longitudinal streak from base, basal line short, it does not extend to inner margin. Inner transverse line double, 
edged with dark outwardly, outer transverse line also double with pale outward edge and finely dentate. 
Orbicular and reniform stigmata with pale grey centres, the space between the stigmata blue-grey. Claviform 
stigma grey, scarcely visible, sometimes completely absent. Subterminal line can barely be discerned. Hindwings 
uniformly grey with distinct central spot. Underside of all wings uniformly grey with faint transverse stripe. 
Hindwings with a dark central spot. Early stages unknown. Labrador. 
E. drewseni Stgr. (4 h £). A somewhat uncertain species. I am illustrating a G, which with the exception drewseni. 
of the size corresponds precisely with the type (type in the Museum at Copenhagen is 29 mm according to 
Henriksen, my specimen measures 35 mm). Perhaps this is only a local race or aberration of dissona Mschlr. 
Forewings impure ash-grey, markings similar to cursoria Hufn., otherwise there is scarcely any difference 
between dissona Mschlr. and drewseni Stgr. The two specimens in Staudinger’s original collection certainly 
represent islandica forms. Greenland. 
The species classified as Euxoa under Section V, p. 34 etc. of main Volume with the exception of 
amoena Stgr. should not have been classified as Euxoa and they will be dealt with in later Genera. 
Section VII: antennae faintly serrate, serrations ciliate. 
E. karschi Graes. (4 h 9)- Classified in main Volume on p. 43 as Rhyacia. A somewhat uncertain species, karschi. 
The specimen preserved in the Berlin Museum as Graeser’s type is a $ and not a <$• karschi is certainly related 
to islandica f. rossica Stgr. and with adumbrata Ev. Staudinger has already presumed this to be the case 
(islandica ? ab. karschi). Also Hampson holds karschi and rossica Stgr. to be synonymous, just as Staudinger 
also with islandica ab. nigra Stgr. According to the description of Graeser the fore wings are elongated, the 
Berlin specimen and the specimen that I am illustrating, which is practically identical, appear to have rather 
broader wings. Amur, Ufiassutai, Changai etc. 
E. oberthiiri Leech (Vol. 3, p. 33, pi. 7 c). According to Filipjev, this is synonymous with tritici f. oberthiiri. 
obscurior Stgr., which is certainly not a fact, obscurior is an aquilina form, whilst oberthuri belongs to the 
islandica group. The antennae vary considerably, the hindwings are never so unicoloured grey-brown in 
obscurior as they are in oberthiiri. Early stages unknown. Japan, West China. 
E. ? norwegica Stgr. (5 a G type). A hotly debated species. According to Warren (Vol. 3, p. 32) it is norwegica. 
synonymous with ? of opipara Morr., according to Ivozhantschikov with islandica Stgr. But neither is correct, 
to judge by the type in the Berlin Museum. Hampson deems the species to be doubtful, norwegica corresponds 
most to pale specimens of nigricans L. from England, but the antennae are entirely different, being much less 
heavily pectinated. The species corresponds to certain forms of tritici but here again the antennae are quite 
different. Forewings grey-black, orbicular and reniform stigmata are ash-grey, inner and outer transverse lines 
more pronounced than either in islandica or tritici , the black lunules in front of the fringes are heavier. Upperside 
of hindwings impure white at base gradually changing to grey-black at outer margin. Underside of forewings 
with dark disc, hindwings with fairly large black dot at end of central cell. A distinct dark transverse line is 
present. The species described as Agrotis nov. spec, (without name) by Wocke E. Z. Stettin 1864 p. 181 refers 
to a different species; Hampson thinks this is perhaps opipara Morr. I Described by Staudinger from a single 
A from Fogstuen, Norway, captured in August. 
E. derasa sp. n. (4 h G type). A smaller species with similar narrow forewings and clearly related to the dcrasa. 
genuine islandica Stgr. from Iceland. Forewings of G are coppery red-brown, almost unicoloured with a dark 
basal streak, also a pointed claviform stigma circumscribed by black. Inner transverse line indistinct, double, 
undulate outwardly. Outer transverse line indicated. A pale subterminal line before margin, anal area somewhat 
darker, sagittate marks absent. A pale, yellowish marginal line, fringes dark brown peppered with pale patches. 
Orbicular and reniform stigmata small with pale brownish centres and dark circumscriptions. Hindwings impure 
pale brown, fringes white. A distinct discoidal streak is present. Thorax of same colour as forewings. Abdomen 
pale brownish as the underside of wings. Underside of hindwings much paler, darker at costal margin with 
an arched stripe indicated. The 9 9 are often much darker, stigmata more prominent. Early stages unknown. 
Uliassutai, Thibet, Transbaikal. 
E. islandica Stgr. (Vol. 3, p. 31, pi. 7 b, islandica and rossica). A very complicated group of forms, which islandica. 
varies exceedingly. Most of the later authors hold rossica to be synonymous with v. rossica Stgr., nigra Stgr. 
and also with karschi Graes. (Hampson). Staudinger’s original specimens came from Iceland and represent 
