88 TOKTRICINA. 



is at once distinguished from that species by the less fasciated 

 markings, and the presence of the ochreous or reddish spot 

 towards the anal angle. 



The imago appears from the end of July to September, and 

 occurs in the south of England, and in the Midland Counties. 

 It frequents Poplars and Aspens. 



GENUS X. CATOPTRIA, GUENEE. 



Palpi longer than the head, densely clothed with slender scales. 

 Basal joint drooping, stout, pyriform, truncate ; apical longer than 

 the basal, slender, subcylindric ; middle ascending, stout, curved, 

 thickest beyond the middle, three times as long as the apical. Max- 

 illa3 short. Thorax ovate, not crested behind. Anterior wings : 

 length exceeds twice the width. Costa regularly arcuated ; in the 

 3 folded at the base ; apex acute, produced ; apical margin concave ; 

 dorsal margin slightly rounded. The discoidal cell reaches three- 

 fifths across the wing. The subcostal nervures are remote, and be- 

 tween the first and second is given out an internal nervure, which 

 passes along the discoidal cell to the apical vein, which it attains 

 close to the second apical nervure. Posterior wings very broad ; 

 apex obtuse ; apical margin concave. The median vein sometimes 

 simple and- sometimes furcate at the apex. Abdomen slender and 

 tufted in the J , stouter in the . 



The insects comprised in this genus are very variable as to 

 size, some of the species attaining dimensions equal to the 

 Pcedisccn, and others are very much smaller ; they are not, how- 

 ever, liable to much variation as to colour or marking. When 

 at rest, the wings are deflected, with the sides rounded as if 

 enveloping the insect. The larvae may all be said to be internal 

 feeders,, but their habits are very little known. 



There are six British species, which are thus tabulated : 



A. Anterior wings with a fulvous, fuscous, or dusky 



patch at the base on the dorsal margin .... Species 13 



B. Anterior wings without a patch at the base on the 



dorsal margin Species 4-5 



C. Anterior wings with the dorsal margin paler than 



the costa Species 6 



1. Scopoliana, Haw. Alls anticis basi marginis dorsalis fnlvis, 

 lineis longitudinalibus nebulisquecinereo-fuscis; costa strigisobli- 

 quis nitidis ; macula ocellari argentea lineolis atris ; posticis griseo- 

 fuscis margine paululum saturatioribus. $ Exp. al. 8-8-J- lin. 



Head rich buff colour, inclining to ferruginous. Face paler. Eyes 



