92 Scientific Proceedings, Royal Dublin Society. 



opinion that it is a distinct form. Heinemann (" Die Schmetter- 

 linge Deutschlands und der Scliweiz," vol. ii., p. 46) identifies 

 this figure of Herrich-Schaifer's with the Tortrix lusana of that 

 author ; hut neither the figure nor my specimens agree with this 

 opinion. Besides, the larva of T. lusana is stated by Heinemann 

 to feed on Yaccinium. 



We may, therefore, conclude that, except for Herrich-SchafEer's 

 unnamed figure, the moth from Tuam is new to science. I have 

 much pleasure in describing it under the name of Tortrix donelana, 

 as a tribute to the gentleman who discovered it. 



Tortrix donelana, sp. no v. 



Imago, Male (Plate YII., fig. 1). — The expanse of the wings 

 varies from 17 to 20 mm. The costa of the fore- wing is well arched 

 at the base, and then runs straight to the tip, which is rather pointed. 

 The hind margin is very slightly convex, except at the anal angle. 

 The ground colour of the fore-wings is yellowish-brown, with a 

 bronzy appearance, which, in certain lights, gives them an olive- 

 green sheen. Near the tip of the fore- wing is a brown costal spot, 

 and an oblique, irregular brown band crosses the wing from the 

 middle of the costa to the anal angle. A few thin, brown, curved 

 lines run from the costa towards the inner margin, between the 

 oblique band and the hind margin, towards which their convexity 

 is directed. The distinctness of all these brown markings varies 

 greatly, as the fore-wings of one of my specimens appear almost 

 unicolorous yellowish-brown, with a bronzy lustre, much resem- 

 bling T. viburnana. The hind-wings have the hind-margins 

 decidedly concave below the tip. Their upper surface is dark 

 grey. The fringe is silvery white. Beneath, the fore-wings are 

 blackish, and the hind-wings whitish-grey. 



The labial palps are of moderate length (fig. 2), and, together 

 with the head and thorax, are covered with brown scales, those on 

 the thorax being darkest. The abdomen is short, hardly reaching 

 the anal angle of the hind-toing. It is clothed with dark-grey scales, 

 and the anal tuft is light yellow. 



Larva (fig. 3). — The larva is of the ordinary Tortrix type. It 

 is olive- green dorsally, yellow laterally, and yellowish-green 

 ventrally, with dorsal and lateral rows of yellowish-white spots, 



