- 9 6- 



on each segment almost confluent with an oval patch. The chitin i 

 is very fragile. 



First imago appeared Oct. 22nd: by November 1st mostly ^cT 



emerged; after this time QO predominated. Nov. 28th the last rj 

 insect appeared : they generally left the pupa shell alter sunset. The 

 majority of the darker shaded variety appeared first. Altogether ^3 cTcT 

 and 44 O Q were the result oi this brood, while about 50 larvae hiber- 

 nated. These stopped feeding alter tilth moult ; neither artificial heat nor 

 the choicest food could induce them to quit their lethargic state. They 

 were transferred Sept. 22nd to a common flower-pot upon damp moss and 

 covered with Oak-leaves, then placed outside the window-sill, protected 

 against rain, snow and the sun by a loosely fitting tin-cover. They 

 gregariously gathered on underside of the leaves and so passed the winter. 



Of the many interesting facts which the rearing of this species revi Is, 

 the most curious is the variation in the coloration of the imagines, They 

 appear in almost equal numbers in two well defined forms, including both 

 sexes, but most striking in the 9 individuals. 



Exp. ^ 1.25 to 1.55 ; 1.50 to 1.90. 



Those specimens belonging to the typical form ( Q ) (Grote, Proc. 

 Ent. Soc. Phil.,VI), arc all easily recognized. They only vary among them- 

 selves in the more or less profuse brown clouding, the lighter or darker 

 shade of this brown color on primaries and the intensitv of markings. 



The aberrant form is entirely destitute of the black longitudinal stripe, 

 which in the typical specimens runs from the base of the wing to beyond 

 the t. p. line, also of the black scales on median nervure and fourth median 

 nervule. The median space is free from all brown clouding, it is "olivac- 

 eous-cinereous," often lighter, and always "sparsely sprinkled with bla< k 

 scales"; the whitish, more or less prominent discal space, with a more or 

 less distinct reniform ringlet. Outside t. p. line a part of the brown cloud- 

 ings is left in the form of a pale brown, narrowing, very variable shade, 

 which is margined exteriorly by a broader or narrower whitish band, fol- 

 lowing the brown shade in all its irregularities. Hind-wings like typical 

 form or paler, discal spot and band often visible. Underneath, band and 

 discal dots often very plain ; often spots obsolete, and bands only indi- 

 cated by a dark dash from costa. The males are of a darker and brighter 

 "olivaceous-cinereous" color, hind wings dark gray. In whitish discal 

 spot on primaries the brown, mostly reniform ringlet always present. 

 Markings the same as in Q. Underneath dots and bands very distinctly 

 marked, though often irregular; sometimes subterminal band is followed 

 by a more indistinct one, or by a row of blunt spots. The males of both 

 forms taken as a whole look more uniform, since the typical form has no 

 perceptible brown clouding within median space, and the characteristic 

 black stripe along sub-median vein is less striking on the darker ground 

 color. Nevertheless, they are as variable as the females : entirely pale 

 specimens with faint markings very rare. 



