1893.] 109 



concerned, I have nothing to add to what is there published. But it 

 was most unfortunate that the details given for the anal parts of the ^ 

 should have been taken from the (^ from Central Italy as regards 

 flava, for I have recently ascertained that these Central Italian exam- 

 ples represent quite a distinct species, and which is no doubt Gh. 

 guadarr. lensis, Ed. Pict., described originally from a Spanish female. 

 Moreover, I find that in the ^ appendages Ch. jiava and vittata 

 closely resemble each other, although the wing-strncture is so different, 

 whereas vn Jiava and guadarramensis, although the wing-stracture is 

 the same, the $ appendages differ widely. Apparently the only obvious 

 difference between these two last-named species, outside the appen- 

 dages, is that the two series of gradate nervules in the wings are 

 strikingly black in guadarramensis. I proceed to give amended 

 diagnostic characters : — 



Ch. vittata. — Costal margin of anterior wings nearly straight (or slightly con- 

 vex) in both sexes, the costal area narrowing gradually. In both sexes the costal 

 nervules are all slender. Superior anal appendages of the (J much shorter than the 

 inferior appendage, stout, sub-cylindrical, but concave internally, the apices obtuse, 

 turned abruptly inward, and carrying a pencil of hairs. Inferior appendage with a 

 broad, boat-shaped basal portion, and an acute (? articulated) lanceolate apical 

 portion turned abruptly upward and backward, and extending to between the su- 

 perior appendages. 



Ch. jiava. — Costal margin of anterior wings excised in both sexes. In the $ 

 the margin is much elevated at the base, and then almost suddenly depressed, so that 

 the costal area is wide at the base and then becomes almost suddenly narrowed. In 

 the ? the excision is shallow and gradual. In the $ the costal nervules are much 

 incrassated from the point where the area is suddenly narrowed ; they are all slender 

 in the ? . Superior appendages much as in Ch. vittata, but apparently more diver- 

 gent, the inturned apices perhaps more constricted at their junction with the basal 

 portion. Inferior appendage having the up- and inturned apical portion much 

 shorter, obtuse, and carrying a short dense pencil of stiff hairs at its apex. 



Ch. guadarramensis.— Stvuctnre of wings ( <? and ? ) as in Ch.flaoa (the gradate 

 nervules conspicuously black). Superior appendages longer than the inferior, stout, 

 cylindrical (but concave internally), the obtuse apices curved upivard and inward, 

 and each furnished with a strong incurved pencil of hairs. Inferior appendage 

 having the apical portion somewhat as in Ch. vittata, but probably less acute, and 

 carrying an acute pencil of stiff dark hairs at its tip. 



As more than eight years have elapsed since my first article on 

 this subject was published, it is somewhat strange that the error 

 should have remained undetected. 



Lewisham, London : March Z\st, 1893. 



