24 
Ferrugata ab. corculata, Lampa, Ent. Tid. vi., p. 110. 
Ferrugata jd., Fb., Mant. Ins. ii., p. 208; Hb. 285; Gn. ii., 413; 
Stgr. 2632; Packard, viii., 62; (ana) (W. V., Fam. M., 
No. 11); ? Bkh., v., p. 387; Ill., N. Ansg., p. 113 ; Lasp., III. 
Mag. ii., p. 171; Tr. vi., 2. 148; Dup. viii., 183. 6 (ad ab. 
unidentaria) ; Bdv. 1628; H.-S. iii., p. 149; Frr. 650. 1 (ad 
ab. unidentaria. 
Linariata, Bkli., v., p. 381 ( nee. Fb.). 
? Spadicearia p., de la H., 240. 
la. Ab. unidentaria, Haw., Lep. Brit., ii., p. 308; Stpk., III. iii., 215 ; 
Wd., 551; Gn. ii., 414; Stgr. 2633. 
Ferrugaria var., Dup.; Frr.; &c., &c. 
2. Spadicearia (W.V., Fam. M., No. 12) Bkh., v., p. 389; H.-S., 
iii., p. 149 ; Frr., 650. 2. 
Ferrugata (aria) var. spadicearia, Fb.; Ill.; Led., Spanner. 
Ferrugata (aria) p., Hb., 460 ; Tr. vi., 2. 148 ; Dup. 
Ferrugaria, Haw., Lep. Br., p. 308; (ata) Wd., 553; Lampa, 
Ent. Tid. vi., p. 110 (? Cl. 6. 14; ? Bkh. v., p. 387). 
Ferrugata var. Linariata, Gn. ii., 413. 
Alchemillaria, Esp., 40. 5 (& 6 ?). 
Freyeraria, Stgr., 1861 Cat., No. 524. 
As this paper deals exclusively with the two species, isolated from 
their surroundings, any systematic remarks on their natural affinities, 
&c. do not necessarily come within its scope and must be omitted for 
want of time; but in order to complete our studies of their nomen¬ 
clature, it may be well to say that there can be no doubt their generic 
name should be Ochyria, Hb.—already resuscitated by Packard in his 
Monograph of the Geometrid Moths of the United States. Whatever may 
be thought of the value of many of Hiibner’s genera, his Ochyria is 
almost identical in its contents with the portion of Coremia, Dup. now 
retained to this latter name and, of course, has priority by several years. 
In Staudinger’s Catalogue it forms part of the great genus Cidaria, Tr., 
according to Lederer’s classification. 
Differentiation. —Regarding the differentiation of the two species 
by their wing-markings, long-continued study has convinced me that 
there is no single differental character which is absolutely constant, 
though undoubtedly the eye can be trained to discriminate them; as 
Mr. Eustace R. Bankes well says in an interesting letter he wrote me 
on the subject, “ there must be to the trained eye some combination of 
peculiarities in colour and markings shown by the one species which is 
never present in the other, although it may be that no one special 
character by itself is absolutely reliable.” 
Mr. C. Fenn, with a considerable portion of my series of purple 
forms of unidentaria before him, as well as his own material, drew me 
up an admirable comparative table of the two, which I cannot do better 
than give in extenso. 
