OLIGIA. By Dr. M. Draudt. 159 
area is somewhat darker grey. Hindwings whitish with widely dusky margin, central spot and delicate post¬ 
median, fringes whitish. Ferghana. 
10. Genus: Olfgia Hbn. 
0. strigilis Cl. (Vol. 3, p. 172, pi. 40 i, k). This species has just lately been subdivided into three. After strigilis. 
Dampf had separated latruncula as a genuine species, quite recently Heydemann claims that the old versicolor 
Bkh. is a third species. All three are very difficult to distinguish, the differences in the two latter are based 
chiefly on the genitalia; strigilis is the most readily recognisable species. It is the largest of the 3 species and 
has a wing expanse of 23—-25 mm. Ground colour is grey-brown to dark brown, reddish, ochreous or yellow- 
brown colouration does not occur. The stigmata have not paler centres. Marginal area varies in colour from 
chalky white over pale grey to blackish, but is never ochreous, rusty or rosy. The arrangement of the markings, 
especially the outer line with its characteristic black dentations in the paler marginal area, appears to be con¬ 
stant and is the best distinguishing feature. The following forms belong here: - amoena Iirul. with greenish amoena. 
hue in marginal area. Described from Wiatlca and Kasan, but also occurring in western Germany. —• conjuncta conjunda. 
Heyclem. denotes specimens with pronounced black oblique streak between claviform stigma and posterior 
transverse line; the stigmata are always unicolourous with ground. West and south Germany, Carinthia.— 
fasciata Tutt blackish brown to blackish with highly contrasting white marginal area. Chiefly occurs in Eng- fasciata. 
land, more rarely in northern Germany, Bavaria, Dresden and Austria. — suffumata Warr. is like fasciata, but suffumata. 
marginal area is suffused with grey-black in which often only the innermarginal part of the marginal band 
is edged with white. A rarer form. — aethiops Ostli. nec Hew. is a completely black form, in which however aethiops. 
nevertheless the deeply black markings are still distinctly visible. Chiefly occurring in northern Germany, but 
also found in Bavaria, Saxony and Austria. — ferrea Warr. is a pale ashy grey .aintly yellowish form, the jerrea. 
central area inclined to brownish grey with very delicate black markings. Only mown from England. 
0. versicolor Bkh. (19 i). We are giving here, as in the other allied species, an extract of the descriptions versicolor. 
of Heydemann. The most striking superficial characteristic is the reddish brown, almost claret ground colour 
of central area from which the two rose, to impure pale yellowish, stigmata stand out. Generally, but not always, 
they have a white and fine black outer edge —- in strigilis they are the same colour as ground and never paler, 
in latruncula they never have a white surround —; fringes are pale yellow-grey with dark grey checks; the white 
postmedian with a very flat arc, as in latruncula, at inner margin. Hindwings dark grey-brown with pale yellow 
marginal line that is somewhat spotted on veins. The deeply black oblique streak on forewings that generally 
conjoins the claviform stigma with the postmedian, is very characteristic. Wing expanse: 22 — -24 mm. —- fasciata fasciata. 
Lenz (= virgata Warr. nec Tutt) is a pale form with almost white marginal area contrasting from the pale rose- 
brown central area. The illustration on pi. 40 i of Main Volume is very good, according to Heydemann. —- 
pseudolatruncula Heydem. has darker central area, dark brown to grey-brown, costa and stigmata are paler, pseudo- 
marginal area quite lilac-grey with brown outer transverse line. In cases where the stigmata are without white latruncula. 
surrounds, frequently almost indistinguishable from latruncula, but the marginal area is never so ochreous or 
rusty red as in the latter. — roseo -suffumata Heydem. is a dusky smoky grey form with pale grey marginal area roseo- 
and brown shade, in fresh specimens the central area is nicely suffused with rosy red. All markings, also the suffumata. 
oblique streak over the inner margin are deep velvety black, also the white of the antemedian line is dusky. 
Apparently only foitnd in Slesvig-Holstein. Through the kindness of Heydemann, we are able to give an illus¬ 
tration of this form (19 i). — - aethiops Heydem. is the rare, extremely black variation in which all markings are aethiops. 
obsolete except the deep black transverse streak, which always remains visible over the inner margin as also 
the surrounds of the stigmata. Holstein. The distribution has not yet been ascertained. It occurs chiefly in 
northern Germany, but is also found in S. Bavaria, Hessen, Paris and Italy. 
0. latruncula Hbn. (Vol. 3, p. 172, pi. 40 i). The species would better be named — aerata Esp. as this latruncula. 
name has 16 years priority. Forewings grey-brown, marked as in the 2 preceding species. The arc of the white aerata. 
postmedian is flatter over the inner margin, straighter than in strigilis. Black streaks along the veins occur 
in pale marginal area, but they are very faint. The dark central area is a darker brown below the distinct 
black oblique stripe. Stigmata appear more prominently pale, they are buff to brownish. Marginal area is 
generally pale yellow-grey, buff to brownish, but apparently never whitish. — meretricula Bkh. has marginal meretricula. 
area behind the white postmedian, quite pale buff to pale yellow-grey. According to Heydemann the illustra¬ 
tion of praeduncula in Main Volume (40 i) corresponds to this form. — intermedia Hormuz, marginal area is not intermedia. 
paler than the unicolourous brown central area, it is dark reddish grey brown, only the lower part of the 
postmedian band is slightly more distinctly white. The black oblique streak is often absent. — aethiops Haw. aethiops. 
is the black suffused form, that is often slightly paler reddish brown in marginal area. The markings of 
central area and frequently also the black oblique streak are still discernible. Generally it is smaller and 
more monotonous in colour than the parallel form of versicolor. It occurs as the only race on the north 
Frisian Islands and in Slesvig-Holstein, in northern Germany it is common but rarer in central Germany. 
