TORTRICINA. 37 



Genus VIII. SIDEREA, GUENEE. 



Antennae setaceous, stoutest in the <$ . Palpi longer than the 

 head; basal joint stout, curved; apical slender, obovate, densely 

 clothed with short scales, half as long as the basal ; middle twice 

 the length of the apical, slightly curved, very stout, thickest towards 

 the apex, clothed with long scales. Maxilla3 as long as the palpi. 

 Thorax moderately stout, ovate, not tufted behind. Anterior wings 

 elongate, triangular ; length exceeding twice the width. Costa arcu- 

 ated, somewhat obtuse towards the base ; the apex slightly pro- 

 duced ; apical margin concave, dorsal margin slightly rounded. The 

 discoidal cell extends two-thirds the length of the wing, and from 

 between the first and second subcostal nervures receives an internal 

 one, which passes to the apical vein between the second and third 

 apical nervures. Posterior wings : apex obtuse ; apical margin very 

 concave ; dorsal margin straight. Abdomen slender in the tf , stouter 

 in the $ , with a caudal tuft at the apex in both sexes. 



M. Guenee has chosen the above name for the reception of 

 the only species at present known in this genus, and places it in 

 his 5th tribe (Sericoridi) , between Notocelia (Aspis) and Sericoris, 

 which does not seem to us as its proper place. It ill assorts with 

 Notocelia, from its not possessing the folded costa, besides the 

 structure of the palpi being very different : in the venation of 

 the anterior wings, however, it approaches the Sericoridi. Its 

 location by Mr. Curtis among the Spilonotce appears much more 

 natural ; but as that appellative is now restricted to such species 

 as have the costa folded, we must find a new one for the subject 

 of this genus, and therefore adopt M. GueneVs. 



1. Achatana, Schiff. Alis anticis griseis, cinereo strigatis; macula 

 basi in medio costa3, altera dorsali angulum analem versus, apice- 

 que brunneis ; posticis fuscis. $ Exp. al. 7-8 lin. 



Head and face fuscous. Eyes black. Palpi as long as the head, 

 fuscous, darkest at the apex. Antennas brown. Thorax and pata- 

 gia dull brown, the latter palest at the apex. Anterior wings dull, 

 pale grey, with chocolate-brown and brick-red markings. At the 

 base is a chocolate-brown patch, streaked with drab, extending one- 

 fourth along the costa, and one-third along the dorsal margin, with 

 its posterior edge broadly angulated in the middle. At the middle 

 of the costa is a broad, oblique, quadrate patch, passing one-third 

 across the disk, and ending abruptly. On the dorsal margin, occu- 

 pying from within the anal angle to near the middle, and proceeding 

 to midway towards the costa, is an obtusely rounded patch, of dark 

 chocolate colour, and edged with white posteriorly : in shape this is 

 sometimes conical, but is frequently angulated on its anterior edge, 



