MESOEUXOA. By Dr. M. Corti. 
39 
Eilipjev drew attention to this fact again in 1927. I believe that this very constant occurrence in the species 
in question justifies establishing a new subgenus, for which the formation of the claspers, as mentioned above, 
is characteristic. In other respects the species of the subgenus do not differ morphologically from Euxoa. They 
have a more or less pronounced protuberance or crater on the frons (more frequently than is the case in Euxoa, 
a completely smooth frons is found in specimens of the same species). The antennae in most of the species so far 
discovered are pectinate or ciliate. Biological data are so far only known of M. lidia Cr. In this regard it is 
remarkable that the ova of lidia are grooved, whilst this is not the case in the ova of species of the Genus 
Euxoa that are so far known. 
M. variegata Wgnr. (5 a). Very* similar to islandica f. rossica Stgr. and also arenacea Kozh. Rather variegcda . 
smaller than islandica, nicely marked, reddish blue-brown, with wide yellow-white costal streak extending to 
the reniform stigma. A dark basal streak, dentate double inner transverse line, brown-black claviform stigma 
and from same a yellow-white streak obliquely downwards almost to inner angle. Median nervure pale, standing 
out prominently. Orbicular and reniform stigmata large with yellowish centres, the cell between them dark 
brown, marginal area and inner margin of forewings paler than the ground colour. Subterminal line pale, 
usually with heavy dark sagittate marks. Fringes yellow-brown. Hindwings brownish, paler in centre with 
distinct discoidal lunule. Outer edge of fringes almost white. Underside pale brownish admixed with white, 
a bold discoidal lunule on all wings. Faint indications of an arched line here and there. Central Asia, Samarkand, 
Issyk-kul, Djarkent, Ussuri. Early stages unknown. 
M. lidia Cr. (Vol. 3, p. 33, pi. 7 c). Very closely related to the following inexpectata Alph. and perhaps lidia . 
only the west european form of same, lidia has no relationship with adumbrata Ev. (Iyozhantschikov assumes 
that adumbrata is a subspecies of lidia). lidia appears to vary little in markings and colouration, now and then 
one finds paler, almost buff specimens, sometimes the white costal streak extends beyond the reniform stigma. 
Also the outer area can be paler and the central area very dark, lidia occurs in June-July, but has also been 
taken in October (2nd generation?). Ova straw coloured, grooved. Larvae are subterraneous, grey-black in 
colour with a greasy gloss. Scutellum grey-black, divided in middle by yellow-white. Feeds on dandelion, 
grass and other low growing plants. Pupa in a frail earthen cocoon, cremaster with 2 spines. The moth is 
attracted to light and sugar. Hitherto only found in north Germany and Holland (Hamburg, Jutland, Luneburg 
Heath, Westphalia, Bremen and Brunswick). Cramer’s note that his specimen originated from Surinam must 
be due to an error. 
M. inexpectata Alph. (Vol. 3, p. 33). Alpheraky describes this species as a variety of lidia Cr. It is inexpec - 
not as dark as lidia, the white patches of lidia are replaced in inexpectata by a pale ashy grey. The thorax is 
more grey than in lidia, basal area is also ashy grey and not black, similarly the costa, and stigmata. Reniform 
stigma even has a brown centre. Besides this Alpheraky mentions a characteristic that is absent in lidia, there 
is a pale stripe from the claviform stigma to the inner angle (such as in variegata Wgnr.). Kozhantscvhikov has 
described a species — arenacea, which he first mentioned as Euxoa inexpectata f. arenacea , then he and Filipjev arenacea . 
considered this arenacea synonymous with inexpectata, which is probably right, arenacea varies considerably, 
I am illustrating a cotype (5 b C). arenacea is much more red-brown, therefore inexpectata would more likely 
be an aberration. The only $ type of Alpheraky originates from Sidemi, Siberia, arenacea is known from many 
localities, Urga, Minussinsk, Irkutsk (Kozhantschikov), also Kamschatka (Corti). Early stages unknown. 
M. distracta sp. n. (5 c). $ antennae pectinate and ciliate. Has the appearance of a small inexpectata distracta . 
being abt. 31 mm, as against 36 mm. Colour and marking as in inexpectata, in many specimens somewhat more 
grey, in others darker, markings more distinct, especially on hindwings. The inner transverse line is straight, 
not dentate as in inexpectata, on the inner margin of forewing it extends sharply outwards, forming a sort of a 
second lower claviform stigma, the outer transverse line scarcely dentate at all outwardly. Underside like the 
species named, but the lunule on hindwings forms an acute angle. Kyssyl-Yart, Seening, Thibet. 
M. deficiens Wgnr. (5 c d)- d antennae serrate and ciliate. A somewhat larger species than the former deficiens . 
and very similar to same, grey-brown, more sharply marked than distracta. Inner transverse line double, inter¬ 
rupted, inner edge pale, outer dark. Outer transverse line similarly double, inner edge dark, outer light. A pale 
undulate subterminal line, which is absent in distracta. Hindwings paler brownish, underside almost monoton¬ 
ous grey-brown with distinct arched stripe on both wings. Discoidal spot on underside of forewings like a 
streak, on hindwings arched. Central Asia, Turkestan. Early stages unknown. 
M. ( ?) detorta Ev. (Vol. 3, p. 32). This seems to me to be an uncertain species. Staudinger classifies detorta . 
detorta as ? v. to tritici. Hampson and Warren place it as an aberration of tritici with reddish ochreous colour, 
pale brown costa, distinct lines and prominent stigmata. According to Filipjev detorta, of which the only 
known $ type is in the Museum at Leningrad, is synonymous with currens of cursoria Stgr. Erschoff deems 
detorta to probably be a variety or local form of tritici L. The type comes from Kiachta, eastern Siberia, 
