102 TORTRICINA. 



the anal extremity armed with coarse, deep, chestnut-coloured 

 booklets. This state continues about three weeks. 



The larva when full-grown is from 7 to 8 lines in length, of a 

 yellowish white colour. The head is heart-shaped, dark chest- 

 nut-brown, and shining ; the shield diaphanous, hazel-colour, 

 shining, divided by a pale dorsal line, on each side of which, 

 near the base, is a darker undefined patch. The anal segment 

 is suddenly attenuated, and bears a hazel-brown cloud. Spiracula 

 dark brown. It feeds in the stems of the Mugwort (Artemisia 

 vulgaris). The young larva apparently enters the stems about 

 3 inches from the ground, eating its way downwards into the 

 root, where it is found during the winter and spring months up 

 to April and May, when it goes into pupa. 



Genus XII. DICRORAMPHA, GUENKE. 



Palpi longer than the head, remote, porrected horizontally ; clothed 

 with very long hairy scales at the apex of the middle joint. Basal 

 joint short, moderately stout. Apical, very slender and acute, twice 

 as long as the basal. Middle, very stout, slightly curved, thickest 

 beyond the centre, not twice as long as the apical. Maxillas as long 

 as the palpi. Thorax slender, ovate. Anterior wings : length greater 

 than twice the width; costal fold reaching to the middle; costa 

 arcuated ; apex obtuse ; apical and dorsal margins rounded. The 

 costal vein reaches to the end of the fold. The subcostal vein gives 

 out an internal nervure between the first and second subcostal 

 nervures, which crosses the discoidal cell, and joins the apical vein 

 opposite the first apical nervure. Posterior wings ample ; apex ob- 

 tuse ; apical margin slightly concave. Abdomen tufted in the 3 , 

 stouter in the $ . 



This is a very extensive genus, and hitherto a most difficult one 

 to arrange, arising from several of the species previously located 

 in it being so very similar to each other as to render their dis- 

 crimination almost impossible; but which (senectana and satur- 

 nana), according to the present classification, belong to another 

 family, and are consequently removed, leaving this group much 

 more congruous and natural. The species, as now recognized, 

 may always be known by a tooth-shaped dorsal blotch, of varied 

 size and colour (usually yellow), sometimes very distinct, at 

 others scarcely visible. The perfect insects fly about in the sun- 

 shine, and some of them are of common occurrence. In the 

 larva state they present several points of affinity to the Halonota ; 

 probably the whole of them live in the roots of herbaceous 

 plants. 



