LARENTID.£—ASTHENA. 197 



double, very erect, but siuuous aad repeatedly angulated, 

 often joined to the first line by a short horizontal cloudy 

 bar : all these lines are dull orange-yellow or pale fulvous ; 

 hind marginal region occupied by two similar stripes much 

 angulated and connected together by clouds of the same 

 colour ; discal spot a small black or yellow-black dot ; cilia 

 pale ochreous, interrupted in the middle by a brownish- 

 ochreous cloud. Hind wings rather narrow and small, with 

 sinuous hind margin ; colour exactly as in the fore wings 

 and crossed by four very irregular undulating orange-yellow 

 stripes ; central spot black, small, obscured by the first 

 transverse line ; cilia ochreous. Female quite similar. 



Undersides of all the wings whitish-yellow, with the trans- 

 verse stripes repeated, but in the fore wings more fused 

 together, yellow-brown. Body and legs ochreous. 



Rather variable in the thickness of the transverse lines, 

 which in some instances almost cover the wings, but more 

 often leave intermediate stripes of ground colour, the 

 broadest being in the centre of the wing. This, as already 

 remarked, is sometimes clear and distinct, in other cases 

 broken by a cloud between the first and second lines. 



On the wing in June and the beginning of -luly ; but in 

 the south often before the end of May. 



L.\KVA cylindrical, or tapering in a small degree toward 

 the head, which is smaller and mucli rounded, pale bluish- 

 green ; general colour apple-green with little or no indication 

 of longitudinal lines, but the segmental divisions whiter ; 

 legs and prolegs green ; usual short bristle.s numerous but 

 small, and the dots from which they arise almost imper- 

 ceptilile. 



August and September ; on maple {.Uii- nmi/n^/ris) in the 

 south of England, but certainly on alder {Almix //i/i/inosa) 

 in more northern hill districts, where no maple is to be found. 



I'lTA apparently undescribed ; in a cocoon of silk and 

 earth beneath the surface of the ground. 



