NOCTUIDA:. TETHEA. 55 



birch, rolling the leaves up like a tortrix, and also on the poplar and oak : — 

 the imago appears towards the end of February or beginning of March. 



Rare : I have several times taken the larvse at Coombe-wood, 

 and once or twice at Darenth. I believe specimens of the insect 

 have been taken at Birch -wood. 



Sp. 7. ridens. Alis anticis viridifusco alboque variis, inaculd baseos strigisque 

 duabus undatis albidis, antennis Jlavescentibus. (Exp. alar. 1 unc. 5 — G lin.) 



No. ridens. Fabricius.—Le. ridens. Steph. Calal. part ii. p. 96. No. 6306. — 

 No. chrysoceras. Beckwith, in Linn. Trans, ii. pi. \.f. 1 — 3. 



Head and thorax greenish-brown, mixed with white hairs: anterior wings 

 greenish-grey, variegated with fuscous and white, with a large distinct blotch 

 of the latter colour at the base of the costa, from which arises a transverse 

 undated whitish striga, from whence to behind the middle is a broad fuscous 

 fascia, between which and the hinder margin is a considerably undulated 

 whitish striga, and on the margin itself is a series of black lunules, bordered 

 within, or towards the exterior margin of the wing, with white ; at the apex 

 is an oblique black streak: cilia greenish, with fuscous spots, connected with 

 the black lunules : posterior wings white, with the nervures at the apex and 

 the hinder margin fuscescent : antennse flavescent. 



Caterpillar yellowish-green, with the upper surface palest, and a whitish stripe 

 anteriorly ; the sides, with some black dots, placed on a dull green streak ; 

 legs brown ; head more or less rufous : — it feeds on the oak : — the imago ap- 

 pears towards the beginning or middle of April. 



Also somewhat rare : found in Richmond-park, at Coombe-wood, 

 and near Otford in Kent : also near Walthamstow, and in the New 

 Forest. " Epping." — Mr. H. Douhleday. 



Genus CXXX. — Tethea, Ochsenheimer. 



Palpi rather short, distant, porrected obliquely, not very robust, clothed with 

 moderate scale-like hairs, the apical joint not concealed, ovate-acuminate; the 

 basal joint half the length of, and stouter than, the second, slightly curved ; 

 the second elongate, rather slender, somewhat Unear, slightly acute at each 

 extremity, terminal about half the length of the basal, more slender than the 

 second, elongate-obtuse : maxillce moderate. Antennce rather short, somewhat 

 robust, pubescent within, each joint with a short bristle on each side in 

 both sexes: Jiead with a short tuft on the forehead: eyes naked, globose: 

 thorax slightly crested anteriorly; abdomen very slender, not elongated, ca- 

 rinated above, the sides and apex with short fascicles of hair : wings deflexed ; 

 anterior abbreviated, retuse or slightly emarginate on the hinder margin, of 

 plain colours, with nearly straight pale transverse lines ; posterior rather ample, 

 a little emarginate towards the costa on the hinder margin : hinder tibiw rather 



