LARENTin.-E- CIDARIA. 281 



noticed above, aud appears to be in a great degree, though 

 not wholly, seasonal, that is to say — in the first generation 

 nearly eveiy specimen has the central band of the fore wings 

 divided by pale nervures, while perhaps one per cent, has it 

 entire ; but in the second generation the exact converse is 

 the case. Further variation upon the same lines is not com- 

 mon, yet specimens are kuown of which the band is broken 

 by one slender pale line only ; in the usual form, when the 

 division is by two lines on nervures. the lines are often 

 slender, leaving a distinct dark intermediate spot, while in 

 other examples the lines are broadened, aud the intermediate 

 spot is reduced or obliterated. In the collection of ^Ir. A. II. 

 Jones is a specimen in wliich the division is so wiile that the 

 costal jiortiou remains only as a tooth-shaped blotch, and the 

 dorsal as a large round spot, the intermediate spot also re- 

 maining visible ; Mr. .J. E. Kobson has reared a specimen 

 at Hartlepool in which the division is equally great; and 

 ^Ir. .]. Gardner another at the same place, in which all the 

 nervures are pale, and divide the band into five or six sections. 

 This last leads towards a most curious and beautiful form, 

 reared by Mr. A. 3Iera, of clear whitish ground colour, and 

 soft pale brown markings, in which the band is most singu- 

 larly cut up, and resembles, in some degree, that of Z/////'/.s 

 rit'n:aU\tn. 



On the wiug in ^lay and -lune. in very forward localities 

 souietinies even at the end of Apiil ; a second generation in 

 July aud August is in the south and south-west verjf partial 

 and uncertain, but in confinement almost complete ; and in 

 the year 1893 Dr. Hiding reported specimens of a partial 

 third generation in Devon late in the autumn. In thenortli 

 there appears to be only one emergence, which takes place 

 late in -June and in July. 



L.iKV.i long, slender, uniformly cylindrical, aud without 

 tubercles, sparingly furnished with short scattered hairs, 

 which are slender and inconspicuous; head flattened, por- 



