225. 



SPERANZA SYLVARIA. 



The Rannoch Geometra. 



Order Lepidoptera. Fam. Phalsenidse Lat, Leach. 



Type of the Genus Speranza sylvaria Nob. 



Spbranza Nob. Phalsena Fab. Geometra Hub., Haw. 



Antennce inserted on the crown of the head close to the eyes, se- 

 taceous, composed of numerous oblong joints the basal one large 

 globose ; each producing 2 ciliated branches in the males (1), — 

 excepting at the apex (lb), and they are much shorter towards 

 the base ; simple in the females and ciliated beneath (2). 

 Maxillce spiral and slender, nearly as long as the antennae, with 

 a few tentacula at the apex (3). 



Labial palpi porrected nearly horizontally, thickly clothed with 



scales, the apical joint distinct (4) ; triarticulate, basal and 2nd 



joints of equal length, the former slightly curved, 3rd minute (4 a) . 



Head small. Abdomen slender, linear in the male, somewhat conical 



in the female. Wings, superior of the male with a small protuberance 



on the upper side, near the base, which is hollow and naked beneath 



(9 a). Legs long; thighs very long. Tibiae, anterior with a spine 



on the internal side (8), the others with a pair of spurs at the apex, 



the posterior producing a pair above the apex. Tarsi very long and 



slender, 5-jointed. Claws and pulvilli minute. 



Caterpillars loopers, with 6 pectoral, 2 abdominal, and 2 anal feet? 



Sylvaria Nobis. 



Male, fulvous orange. Superior wings lurid, the costa spotted 

 with orange ; 4 darker sinuated strigae across each wing, the 2nd 

 from the base being nearly straight, and a small dark spot in the 

 middle ; inferior wings obscurely and minutely speckled with 

 fuscous, having 2 obscure curved lines and a dull spot between 

 them. Cilia pale fuscous. Beneath orange, speckled with a 

 deeper colour. 



Female dull orange, freckled with brown, the strigae broader and 

 more distinct than in the male, the spot in the upper wings more 

 obscure. Beneath pale orange, the strigae and spots ferruginous. 



In the Cabinets of Mr. Dale and the Author. 



