TORTRICINA. 35 



the costa is strongly marked with oblique streaks, most distinct 

 before, and immediately beyond the central fascia. Apical scales dull 

 dark brown with pale bases. Cilia dark smoky brown, with a violet 

 tinge and paler bases, both becoming paler at the anal angle. Pos- 

 terior wings dull golden brown. Marginal scales fuscous, with dusky 

 subochreous bases. Cilia pale fuscous. Abdomen fuscous, shining ; 

 the caudal tuft paler and dull. $ Exp. al. 5 lin. In general 

 markings like the <$ , but more denned and of richer tone. 



The smallest of the known British Antithesis, and somewhat 

 rare. Distinguished by the ordinarily pale fascia towards the 

 apex of the anterior wings, being much suffused, and not much 

 paler than the basal portion. 



The imago appears in June. It occurs in Norfolk, Coombe, 

 and Darenth Woods. It is not enumerated, either by Guenee, 

 or Herrick Scbseffer, by which it seems unknown on the Con- 

 tinent. 



Genus VII. PENTHINA, TREIT. 



Head narrow. Antennae setaceous, stouter and pubescent beneath 

 in the < . Palpi rather longer than the head, curved and por- 

 rected upwards ; basal joint short and stout ; apical minute, oval, 

 half the length of the basal ; middle six times as long as the 

 apical, stout, curved, cylindrical, clothed beneath with long scales. 

 Maxillae stout, much longer than the palpi. Thorax stout, sub- 

 globose, tufted behind. Anterior wings : length exceeds twice the 

 width. Costa regularly arched ; apex obtuse ; apical margin slightly 

 concave, dorsal margin rounded. The discoidal cell extends beyond 

 the middle of the wing, and is wholly situated in the upper half. 

 Posterior wings ample, apex obtuse ; apical margin scarcely concave. 

 Abdomen slender, tufted in both sexes. 



By Herrich Schseffer, the only example at present known in 

 this genus is associated with the Antithesis, but it is abundantly 

 distinct both in the form of the larva and in the imago state. 

 The former is more elongated and active ; and in the structure 

 of the perfect insect the palpi are very long, independent of the 

 disposition of the colouring being widely different. Treitschke 

 has erected it into a distinct genus as above ; and we have adopted 

 his views. 



1. Salicella, Linn. Alis anticis margine dorsali lata albis ; basi ma- 

 cula nigra ; costa ad apicem margineque apicali cinereo, fusco, 

 nigro atroque variegatis ; thorace niveo, nigro punctato ; posticis 

 fuscis, margine saturatioribus. <$ Exp. al. 9-9^- lin. 



Head snow-white behind, black on vertex, with an irroration of 



