TORTRICINA. 275 



The imago appears in June and July, frequenting Fir-trees. 

 It occurs at Darenth and West Wickham Woods, Mickleham, 

 and other places round London. 



Note. In the Museum Catalogue, p. 73, is a species referred 

 to this genus, under the name herbaria of Guenee ; and in the 

 rich cabinet of Mr. Edwin Shepherd are several specimens bear- 

 ing that specific name ; but they do not agree with M. GueneVs 

 description. Mr. Shepherd's specimens are of the same size as, 

 and exceeding similar to, S. lacunana ; but the ground-colour of 

 the anterior wings is dark, cinereous, or smoky black. [Query; 

 are these distinct from lacunana, or merely varieties of that insect ?] 



In the same Catalogue the late J. F. Stephens has inserted as 

 British, a species under the name of bistrigana, on the authority 

 of two examples in the Bentleyan cabinet (Mr. Edwin Shepherd's). 

 Mr. Bentley obtained them from Mr. Stone. These specimens 

 are said to be North American, and therefore not admissible into 

 our lists. 



GENUS IV. MIXODIA, GUENEE. 



Palpi longer than the head, remote, ascending ; basal joint stout, 

 truncate ; apical slender, obovate, densely clothed with short spread- 

 ing scales ; not so long as the basal ; middle stout, curving, thickened 

 beyond the middle, densely clothed beneath with long scales ; more 

 than three times as long as the apical. Thorax slender, ovate. An- 

 terior wings triangular ; length twice the breadth ; costa regularly, 

 but slightly, arcuated ; apex acute ; apical margin subtruncate, 

 rounded ; dorsal margin rounded. The costal vein reaches to the 

 middle of the margin. The subcostal nervures equidistant. The sub- 

 costal vein gives out an internal nervure towards the second costal 

 nervure, which passes to the apical vein between the first and second 

 apical nervures. The discoidal cell is widest towards its apex, and 

 scarcely proceeds two-thirds the length of the wing. Posterior 

 wings ample ; apex obtuse ; apical margin concave ; dorsal margin 

 entire ; basal angle produced. Abdomen long, slender, tufted in both 

 sexes. 



This genus is established by M. Guenee for the reception of 

 M. Schulziana and another species; but the separation from 

 Sericoris seems needless, nor is there sufficient structural differ- 

 ence to warrant it. Nevertheless, his view is adopted here, until 

 a knowledge of the preparatory states either restores it to its old 

 position, or confirms the present one. 



T2 



