6 TORTRICINA. 



in the modification of any or all of these, does the variation 

 we witness in these insects consist, except perhaps among the 

 Peroneid&y where the colouring and direction of the markings 

 in one or two of the species assume quite a different aspect. 

 Short oblique streaks upon the costa are of very frequent occur- 

 rence, which are for the most part geminated, or arranged in 

 pairs. These streaks are frequently produced or continued to the 

 middle of the wing, and often to the opposite or dorsal margin. 



The type of marking is simplest and most perfect in the 

 fasciated species of the genus Tortrix (hcparana, Ribeana, cin- 

 namo?neand), and least so in the genera Capua, Bactra, some 

 of the Peronetf, Retinia, Endopisa, and Phtheochroa. 



Of the above-mentioned marks, the central fascia is the most 

 conspicuous, and generally present ; next to this, the basal 

 patch, then the subapical costal spot, and lastly, the ocelloid 

 patch ; the remainder do not require especial notice. 



The central fascia originates about the middle of the costa, 

 and is, independent of its colouring, varied in direction and 

 shape. In direction it is straight, or proceeding at right angles 

 with the margins of the wing, as in some species of the genus 

 Euchromia : it is curved, as in Cnephasia hylridana $ : it 

 is oblique ; and the obliquity is twofold : in the first place, it 

 commences on the costa and proceeds to the anal angle; se- 

 condly, it lies more or less parallel with the apical margin. 

 Instances of the former occur, amongst others, in the genera 

 Tortrix and Lozotania, and of the latter, only in the family 

 Lozopcrida*. In quantity it is entire, interrupted, or abbre- 

 viated : entire in Tortrix ; interrupted, as in Brachyt&nia Hart- 

 manniana, Aryyrolepia Baumanniana and its congeners ; and ab- 

 breviated, as in Brachytania semifasciana, and in most of the 

 Eupcecilia. It possesses, besides, other characters ; such as being 

 isometric, constricted, dilated, angulated, &c. ; but as it fre- 

 quently happens that two or more of these are present in the 

 same species, it is not proposed, here, to do more than allude to 

 them. 



Sometimes a second fascia is visible, and when so, it is always 

 a prolongation of the subapical costal spot. (Enectra Pilleriana $ 

 has this mark distinctly present. 



The basal patch is scarcely less Protean than the central 

 fascia, but is more frequently absent altogether. In some in- 

 stances it is solid, 2. e. composed of one colour only ; in others, 



* In the genera Argyrokpia and Eupacilia the central fascia in many species 

 is expressed only on and towards the dorsal margin ; in such cases it may be 

 considered as originating THEREON, and &$ proceeding TOWARDS the costa. 



