412 PERCONIA. ByL. B. Peout. 



which, however, seems to have rather shorter palpus. Recorded from the S. E. Altai and the Changai Mountains. 



nigricans. — ab. nigricans Jourdhouille is a more extreme development, almost or quite unicolorous fuscous. Recorded 



orientaria. as a rare aberration in Europe. — orientaria Alfli. is a form from the Caucasus, Thian Shan, Sajan'and 



insignia. Amdo districts, etc., with little or no dark irroration. — insignis Alfh. is, according to its author, an aberration 



of orientaria, whitish with but little tinge of yellow, the dark irroration partial and irregular. But the entire 



race is very variable. — Larva ochreous grey, with blackish, ochreous-edged dorsal line and various other fine 



darker and paler longitudinal lines. On low plants, hibernating. Moth in July- — August, widely distributed in 



Europe (except the North), Central Asia and to E. Siberia. A very close relative in Arctic America, W. Canada, 



etc. (see above). 



albaria. A. albaria Bartel (24 h) is perhaps another form of gilvaria, but the $ is still narrower- winged and the 



palpus and tongue'appear shorter, the ^ antennal pectinations decreasing less in length apically. Whitish, 

 the outer line more curved and running further from the distal margm on both wings. Ural. 



collinaria. A. colh'naria Holt-White (= hesperis Warr., canaria Rbl.) (24 i). Near gilvaria, forewing above and both 



wings beneath deeper, brighter yellow, the line shorter and more curved. Canary Islands. 



ochrearia. A. ochrearia Rossi (= citraria Hb7i.) (24 i). Forewing less elongate than in gilvaria, much yellower, 



the markings more blue-grey (not brown), on the hmdwing much more strongly expressed; postmedian line 



less oblique, more sinuous, forewing also with a distinct antemedian line. Hindwing with 2nd subcostal 



unicolorata. stalked. Not very variable, the $ often, the ^ more rarely with much more copious irroration. ■ — ab. unico- 



alba. lorata Seeb. has both the wings unmarked on the upperside. — ab. alba Krausse is almost M'hite, with sharp 



aestiva. markings. — gen. aest. aestiva Schaiverda is generally smaller and paler, more spotted. ■ — Egg deep yellow, 



oval, but with one end flattened and containmg a deep micropylar depression; surface with weak hexagonal 



pitting. Larva similar to that of gilvaria, pale ochreous brown. On various low plants and flowers, hibernating. 



Moth in May — -June and August — September, England, France, S. Europe, N. Africa, Asia Minor and Syria. 



Irilinearia. A. trilinearia Leech (25 c) is a very distinct species, the forewing brown with 3 white lines, the 2nd 



and 3rd smuous. Palpus rather short and stout. ^ unknown. W. China: Wa-shan. 



revocaria. A. revocaria Stgr. is doubtfully placed, the palpus rather short, wings broad, distal margin of hindwing 



at least as irregular as in Perconia, forewing with 2nd subcostal arisnig from stalk of 3rd-5th. Easily recognized 

 by the shape and the short, thick apical streak. Statjdinger's type has darker dusting, discal dots and fine 

 dark line accompanying the pale one. Underside unmarked. Syria. 



167. Genus: Percoiiia Hbn. 



Essential cliaracters as in Aspitates, palpus and tongue rather strong, forewing with 2nd siibcostai 

 occasionally stalked with 3rd — 5th, hindwmg with distal margm sinuous, slightly concave from 2nd subcostal 

 to 3rd radial. — ■ Larva with the posterior trapezoidal tubercles raised on abdominal segments 2 — 6 (especially 

 those on the 5th) ; pomts at anal end less developed. — Only the 3 Palearctic species have been detected. Often 

 merged in Aspilates, but the larva and the genitalia suggest that the separation is justified. 



strigiUaria. P. strigillaria Hbn. (= respersaria Hbn.) (25 k). White, with fuscous irroration; all the lines present, 



usually also a subterminal dark Ime, thus'somewhat Acidaliid in aspect. Median line (or shade) variable in 



kerpeticaria. -position and m thickness. — ab. hcrpeticaria Bbr. (= dilatata Strand). Antemedian and median lines of fore- 

 grisearia. wing thick and closely approximated, sometimes confluent mto a band. — grisearia Stgi . (25 k) is a greyer 

 form the white ground-colour nearly suppressed. Frequent in N. Europe, etc., but not very sharply sepa- 

 rable from the name-type. Most British examples are intermediate. — cretaria Ev. is a clearer white, 

 weakly marked form from S. E. Russia, sometimes quite markingless. — Egg long-oval, straw-coloured, micropylar 

 end broad, with 'a circular indentation. Larva somewhat thickened posteriorly, grey mottled with brown, the 

 dark dorsal line usually interrupted on the middle segments. On heather, broom, etc.,' hibernating. Moth in 

 May — June, Europe, Asia Minor and the Tarbagatai Mountains. 



haeticaria. P. baeticaria Rbr. (251 [boeticaria]). Shnilar to large strigillaria, dirty brownish, apices rather sharper, 



caalUiariu. cell-dots usually larger, very black beneath, fringes dark-spotted. Andalusia. — castiliaria Stgr. (251) is a paler, 

 more yellowish form, the lines showing up distinctly. Castile. 



innocerdaria. P. innocentafia Chr. (25 1). Ground-colour chalky white, recalling strigillaria cretaria but generally 



of larger size and distinguished by the markmgs. (J with strong, $ with slight, dark irroration. Forewing with 

 weak (sometimes obsolete) ciirved antemedian line, both wings with denticulate postmedian line and a brown 

 median shade, that of forewing complete, rather oblique, placed distally to the cell-dpt, that of hindwing 

 obsolete at costal margin. Transcaspia. 



