CIDARIA. By L. B. Prout. 
163 
and it has since become evident that they need separating. — - albigressa subsp. nov. (15 k). Variable, but on albigressa. 
an average decidedly smaller than s. supergressa ; nearly always with considerably more white, both in the proxi¬ 
mal area (notably of the hindwing) and outside the subterminal line; a very frequent character, not even sug¬ 
gested in the Japanese race, is the white or whitish apical patch of the forewing, both above and beneath. Ussuri: 
(Khabarovsk, Okeanskaja, Vladivostok, etc.; N. China: Kalgan; Korea: Gensan, this latter perhaps in some 
measure transitional. June to early August . Type from Russian Island, S. Ussuri, in the British Museum collection. 
C. alternatet Mull. (Vol. 4, pi. 10 b, as sociata) ab. tenuifasciata Schima (= degenerata part. Prout, nec tenuifascia- 
Haw.) has the median band of the forewing much attenuated (breadth 1 — 1.5 mm), but not actually inter¬ 
rupted. A $ taken at Diirnkrut yielded as offspring 11 d'U and 7 $$ which inherited her character, while 10 
specimens were typical alternata ; 1 was more extreme, a veritable degenerata. — ab. degenerata Haw. (16 a), degenerata. 
as Schima points out, may be restricted to Haworth’s own form, which “chiefly differs” (from alternata)'' ‘ in the 
median band of the forewing, which is reduced to an interrupted band-like stripe”. He knew only one 
example, from Kent, but the form, though always interesting, is not excessively rare. A very extreme develop¬ 
ment, from Cannock Chase, has been figured and discussed in Trans. Ent. Soc. Lond., Vol. 76, p. 529. — ab. 
divisa Osihelder has the median band completely divided by a pale central stripe. Very rare, a particularly fine divisa. 
$ example from Schleissheim. —- ab. pseudorivata F. Wagn. has the dividing-line of the white postmedian band pseudori- 
more or less completely obsolete, the proximal part of the hindwing also less dark than usual, so that the 
whole appearance is more rivata- like, except as regards the distal area. A second generation, bred from a $ 
taken at Magredis (Udine) early in May, consisted almost entirely of this form. — ab. eulampa Kautz. Light eulampa. 
grey, with violet reflections, the median band very broad, not darker, the white markings very narrow, but 
distinct. Seewalchen (Attersee), 1 only. — ab. albinata Romaniszyn seems to be semi-albinistic, “both wings albinata. 
very pale yellow” instead of dark brown-grey. Poland. — ab. effusa L. Mull, is a modification of ab. pscudori- effusa. 
vata, with the white postmedian band very broad, the boundary between it and the median band ill-defined. 
Freudenau, Vienna, 1 $, taken on 30 April. — dynata form. nov. (16 a). An exceptionally large and ample- dynata. 
winged form, the median band of the forewing generally broad in proportion, in other respects a strong con¬ 
trast to rivata ; in particular the hindwing is well darkened and the line which bisects the white postmedian 
band is strong on both wings. Sicily: Liepo on the Ficuzza, 3^, 2 $$, besides a pair merely labelled Ficuzza, 
all collected in May by Ragusa, the only one with exact date “10.5”. Possibly this is the regular first-brood 
form in Sicily; 2 from Palermo, 2 June 1926 (Stattder) are quite normal alternata. I know nothing of the 
“ rivata ” said by Spada (Nat. Sicil.. Vol. 12, p. 222) to have been bred from larvae found on Cupressus semper- 
virens (!), but the same article contains also other highly improbable records of food-plants. — pseudotristata pseudotri- 
Heydem. On the whole smaller than typical alternata ; markings normal but deep black-grey, without 
the brown and blue-grey hues, thus superficially similar (sometimes deceptively so) to tristata. Sajan Moun¬ 
tains, 2600 m. 
Subgenus Perizoma Hbn. 
C. taeniata Steph. (= intrusata H.-Sch.) (Vol. 4, pi. 8 1). The genitalia, as was mentioned in Vol. 4, taeniata. 
are not altogether concordant with those of the other European Perizoma, but the reference to “gnathos wanting” 
had no special significance, as that is a character of nearly all Larentiids; the very differently formed valves 
and uncus and other points in the structure show that it may need subgeneric or generic separation. So, too, 
does the whole life-history; Dr. Cockayne, ivho has studied this carefully, tells me that he is far from satisfied 
with the present position. Sterneck points out that this taeniata- group may easily be distinguished from the 
rest by the essentially larger distal areole. — ab. bronnoensis Strand. A U from Bronno (Nordland), rather brdnndensis. 
worn, was considered to represent possibly a local race, but a second from the same locality was much more 
typical. The original has a wing-length of 11 mm and looks blackish, with whitish and greyish markings, the 
usual brownish or reddish tinge apparently wanting. The type of markings of the fore wing is said to recall 
that of coerulata F ., the pale band beyond the middle extended at the expense of the median band, etc. I suspect 
that its condition may in part have been responsible for its abnormal aspect. — saxea Wileman (14 c). We saxea. 
figure a U °f this Japanese race. — obsoleta Djakonov from the E. coast of Kamtshatka (Petropavlovsk and obsoleta. 
Tarja, Avatscha Bay) is a light brownish-yellow form which, though moderately variable, always deviates 
strongly from typical taeniata in its unicolorous tone and weak, obsolescent markings. It is, as Djakonov says, 
very remarkable that in the interior (on the upper Kamtshatka River) taeniata is typical; the genitalia of the 
two forms show no differences. 
C. albofasciata Moore (Vol. 4, pi. 7 h). The Dharmsala form, which constituted our authority for intro- atbofaseiata. 
ducing this North Indian species into Vol. 4, is like the Sikkim type or with even more white in the median 
area. Sterneck records 3 from Kwanhsien, one twice as large as the other two. I suspect the latter two, at 
any rate, belong to — mixtifascia form. nov. Considerably smaller (19—22 mm), the white outer spot of the mixtifascia. 
