194 I.EPlDOl' TERA . 



usual white •.Toiind colour is suffused with smoky cloudintr, 

 throu<.'h which the markings show in darker colour ; but in 

 more rare instances these l)ecome alisorbed and the wings 

 become of a dark smoke colour, with only the nervures, the 

 costa, and the hind mai-gin blacker. Dr. Mason has such an 

 example, and there is one in the collection of the late Mr. 

 Jioud. At an opposite extreme Mr. Sydney Webb possesses 

 a white specimen in which the markings are absent, except 

 the spots at their origin along the costa. and a dark brown 

 central horizontal streak. 



On the wing in July and the beginning of August. 



LAli\ A. Head narrower than the body, which is of nearly 

 uniform width throughout its length, but not ]>erfectly cylin- 

 drical, being slightly dilated at the sides, where the lateral 

 skinfold is conspicuously develo])ed ; every segment has two 

 trausverse but irregular series of minute warts, each of whieii 

 emits a minute liristle ; these minute warts and bristles are 

 ten or twelve on each segment ; head dingy transparent 

 green ; body brighter green, with a faint indication of paler 

 longitudinal stripes ; there are reddish blotches on the sides 

 of the second to fourth, and sixth to eighth segments, and 

 also on the backs of the sixth to eightli segments, but 

 there is a want of uniformity about the form and position of 

 these blotches ; legs semitransparent ])ale purple or ])inkish- 

 green : ventral ])rolegs pale transparent green with a ])urple 

 spot at the base; anal jn'olegs nearly concolorous with the 

 body, but more transparent. (K. Newman.) 



July or August, sometimes to the beginning of Septeuil^er; 

 on mountain a.sh (Pijnis ui'ci'pdria), feeding u[) ver\' rapidlv, 

 sometimes within a month. 



I'll'A pale yellowish-brown ; covers of the head, thorax, 

 and wings yellowish-green ; cremaster set with fine ])oints. 

 (Jlofmann.) Mr. Newman's larva assumed the pupa state in 

 a turned down leaf. The winter is passed in this condition. 



