146 BR. J. ENT. NAT. HIST., 6: 1993 



10 Valva comparatively long, slightly emarginated medially blandella 



— Valva comparatively short, strongly emarginated medially proximum 



11 Posterior margin of vinculum with broad, V-shaped emargination, without 

 lateral process huebneri 



— Posterior margin of vinculum with extremely broad, U-shaped emargination, 

 long lateral process present kroesmanniella 



Females 



1 Eighth segment without folds or processes fraternella 



— Eighth segment with folds or processes 2 



2 Ductus bursae with pair of lateral sclerotizations posteriorly 3 



— Ductus bursae without lateral pair of sclerotizations posteriorly 6 



3 Eighth segment with pair of big, rounded sclerotizations marmoreum 



— Eighth segment without rounded sclerotizations 4 



4 Antrum funnel-shaped vicinella 



— Antrum reduced 5 



5 Forewing 4.0-5.0 mm alsinella 



— Forewing 5.5-6.5 mm viscariella 



6 Signum: big hook with additional teeth junctella 



— Signum: moderately small to reduced hook, without additional teeth 7 



7 Signum: distinct hook 8 



— Signum: hook completely reduced kroesmanniella 



8 Eighth segment with numerous narrow folds and microtrichia ventro- 

 medially tricolorella 



— Eighth segment without narrow folds and microtrichia ventromedially 9 



9 Eighth segment with pair of long digitate processes dorsally blandella 



— Eighth segment with pair of digitate or flap-like processes ventrally 10 



10 Ventromedial zone of eighth segment with sclerotized ovate plate . .proximum 



— Ventromedial zone of eighth segment membranous 11 



1 1 Processes of eighth segment long, digitate blandulella 



— Processes of eighth segment short, flap-like huebneri 



Description of species 



Caryocolum alsinella (Zeller, 1868), Plate V, Figs 10 and 11 



semidecandriella (Tutt, 1887) 



semidecandrella (Threlfall & Stainton, 1887) 



Wingspan 8.5-11 mm. Head, thorax and tegulae mid-brown mottled with white, 

 face white. Forewing whitish, flecked with mid-brown; black markings; broad patch 

 from fold to costa at \, spots at §, f, the latter comma-shaped and extended 

 towards dark brown tornus; markings usually surrounded by orange-brown scales; 

 irregular orange-brown patch distal of cell; white costal and tornal spots at \ 

 separated; forewing apex with patch of black scales. 



Male genitalia (Fig. 1). Transtilla without spines. Valva long, slender, sword- 

 shaped. Sacculus short, thumb-shaped, concave emargination distoventrally. Posterior 

 margin of vinculum with deep medial, shallow lateromedial incision. Saccus long, 

 slender. 



Female genitalia (Fig. 13). Eighth segment without processes, two pairs of short 

 ventromedial folds developed. Antrum reduced. Ductus bursae with pair of long lateral 

 sclerotizations posteriorly. Signum with large, stout, strongly bent hook. 



