264 TORTRICINA. 



apical margin truncate, slightly oblique ; dorsal margin very slightly 

 rounded. The costal vein reaches the margin at the middle ; sub- 

 costal nervures equidistant. The discoidal cell lying in the upper 

 half of the wing, and not proceeding two-thirds its length ; widest at 

 its apex. Posteriorwings ample ; apex obtuse ; apical margin rounded. 

 Abdomen tufted in both sexes ; long and slender in the <$ ; stoutest 

 in the $ . 



The only species remaining in this genus is associated in the 

 Museum Catalogue with the insects in sections B. and C. of the 

 preceding group, and, by itself, seems altogether out of place. 

 Although decidedly distinct from Ablabia, there are, neverthe- 

 less, some points of analogy which lead in that direction. The 

 subterranean habit of the larva of Orthotcenia antiquana induces 

 to this opinion ; for, notwithstanding the larva of Ablabia is un- 

 known, we expect its habit is similar. Time will show. 



1. antiquana, Hub. Alls anticis albidis vel cinereo-fuscis, maculis 

 discoideis longitudinalibus fuscis; posticis griseis. 3 Exp. al. 

 9lin. 



Head and face drab. Eyes black. Palpi longer than the head, 

 drab, paler beneath. Antennae fuscous. Thorax and patagia drab. 

 Anterior wings dull, pale drab, with fuscous clouds and markings. 

 Costa streaked with drab in the geminated form ; the interspaces 

 fuscous; the dorsal margin finely marked with the latter colour. 

 Near the base, at the middle, is a slightly- dilating, not very clearly- 

 defined, pale fuscous patch, succeeded by another larger, darker, and 

 sharply-marked one, of obtuse triangular form, with its base towards 

 the costa ; beyond this, and towards the anal angle, is another mark, 

 in colour similar to the basal one, which, with a broad distinct streak, 

 originating on the apical margin, proceeds towards the costa, and 

 meets a suffused cloud of fuscous grey colour coming from the apex. 

 All these marks are edged with whitish scales. Apical scales fuscous 

 grey. Cilia drab. Posterior wings and marginal scales pale fuscous ; 

 the latter with the bases paler. Cilia drab. Abdomen pale fuscous. 

 2 Exp. al. 9| lin. 



An uncommon species ; tolerably constant in size, but very 

 variable in colour, and in the intensity of its markings. 



The imago appears in June and J uly, and occurs at Darenth, 

 Ripley,in Norfolk, Cambridgeshire, Gloucestershire, and Cheshire; 

 also in Scotland, at Kilmun, and in the vicinity of Edinburgh. 



According to Colonel Goureau, in the ' Annales de la Societe 

 Entomologique de France ' for 1851, p. 233, &c._, the larva is re- 

 presented as feeding in the roots of Stachys arvensis, undergoing 

 its transformations therein. It is white, with a chestnut-brown 

 head; the mandibles and labrum blackish brown. 



