208 HAUSTELLATA. — LEPIDOPTERA. 



blackthorn^ and bistort (Polygonum aviculare) :— the imago probably appears 

 about A.ugust. 



The only indigenous examples of this elegant species which I 

 have seen are also in Mr. Swainson's collection, butof their locality 

 he can give me no information. 



Sp. 2. citraria. Alis anticis Jlavis, atomis strigisque duabus punctoque inter- 

 jectofuscis, posticis albidis,fascid viaculaque medio-fuscis. (Exp. alar. 1 unc. 

 1—6 lin.) 

 Ge. citraria. H'ubner As. citraria. Steph. Catal. part ii. p. 129. N'o. 6531. 



Anterior wings yellow or luteous, a little freckled with fuscous, with an incurved 

 fuscous striga at the base, and a broader repanded one behind the middle, 

 placed very obliquely 5 between these is a round fuscous dot placed towards 

 the costa: posterior paler, with a spot in the middle; and a waved striga 

 towards the hinder margin pale fuscous. 



Extremely variable in size and in colour, and in the intensity, breadth, and 

 distance of the strigse ; in some examples the latter are entirely obliterated ; 

 others have them of a bright ferruginous hue, and the freckles are of the same 

 tint, and the costa of the anterior wings is also occasionally ferruginous. 



Not uncommon in certain places in June and August, fre- 

 quenting clover-fields, and flying by day: I have taken several 

 examples both at Darenth and near Hertford ; it also occurs in the 

 New Forest. 



Sp. 3. gilvaria. Alis anticis sulphuj'eis, strigd prwobliqud, puncto medio ato- 



misque fuscis. (Exp. alar. 1 unc. 3 — 5 lin.) 

 Ge. gilvaria. Wien. Verz.—As. gilvaria. Steph. Catal. part n. p. 129. JVo. 6532. 



Anterior wings pale sulphureous, freckled throughout with pale fuscous, with a 

 larger fuscous spot on the disc towards the costa, and a very obhque straight 

 fuscous striga arising from the apex of the costa, but not extending to the 

 inner margin of the wing : posterior wings paler, with an obscure fuscous 

 spot in the middle, and a pale transverse striga towards the hinder margin. 



In some examples the oblique striga on the anterior wings is nearly obliterated, 

 in others it becomes so wide as to be fasciseform. 



Caterpillar greenish-ash, striped with ferruginous, and a dorsal lateral line : 

 head yellowish-white : it feeds on the millefoil (Achillcea Millefolium J : — the 

 imago appears in August. 



Local, but abundant where found; it has been taken at Ro- 

 chester; but in some grassy fields to the east of Dover Castle (near 

 the spot where I had the pleasure of capturing Pontia Daplidice) it 

 occurs in the utmost profusion. 



