GENERA OF AFRICAN LYCAENIDAE 65 



Eyes, palpi, antennae and legs as in Eresina. 



Wing venation (Text-fig. 250). Differs little from that of Eresina : on the fore wings vein 10 

 arises from the anterior margin of the cell very slightly before the upper angle. 



Male genitalia (Text-figs 62, 63). Eighth tergite ends in a sort of small claw ; uncus com- 

 posed of two small finger-like lightly divergent processes ; no subunci ; tegumen rather large ; 

 pseudotergum [see Bayard, 1933, Bull. Soc. Fr. Microsc. 2(4) : 83, 99) well developed but semi- 

 membranous and translucent, so that it is difficult to locate its anterior margin precisely by 

 observation under the microscope ; inferior fultura pedunculate, fused to the base of the valves ; 

 valves oblong, abruptly narrowing just before the extremity which is bent at an angle like a foot ; 

 penis very specialized, strongly curved, slender and including (at its tip) two long needle-like 

 spines. 



The remarkable form of the penis in this genus suggested the generic name Toxo- 

 chitona. The armature of T. sankura is very similar to that of gerda, differing only 

 in the shape of the uncus and the apex of the valves. I do not know the armature of 

 T. vansomereni, described on the basis of a unique female and I place it in this genus 

 only on account of its external appearance. 



List of Species of Toxochitona 



Toxochitona bitjensis (Bethune Baker), see gerda. 



Toxochitona gerda gerda (Kirby), 1890. Fig. Smith & Kirby, 1892. 



bitjensis (Bethune Baker), 1926. 

 Toxochitona gerda unicolor (Aurivillius), 1898. 

 *Toxochitona sankuru Stempffer, 1961 : 51, figs. 

 Toxochitona vansomereni (Stempffer), 1953, Annls Mus. R. Congo beige 27 : 12. 



Genus ARGYROCHEILA Staudinger 



Argyrocheila Staudinger, 1891, Dt. ent. Z. Iris 4 : 215 ; Aurivillius, 1898 : 284 ; 1920 : 341. 

 Type-species : Argyrocheila undifera Staudinger, by monotypy. 



Eyes naked ; palpi small, slender, scarcely reaching beyond the frons ; antennae slender, 

 short, hardly one-third the length of the costa, club distinct, short ; legs annulated, black and 

 white, (J fore tarsus unsegmented. 



Wing-shape ; fore wing in undifera deeply lobed at the ends of veins 6, 5 and 4, with the biggest 

 saliant at vein 4. In inundifera and bitje the outer margin is strongly convex but devoid of 

 lobes. 



Wing venation (Text-fig. 251). Fore wing with 12 veins ; from the upper angle of the cell 

 there arises a stem from which vein 6 branches, and this stem continues as the common stem of 

 7+8+9- 



Male genitalia (Text-fig. 64). Uncus narrow, trapezoidal, with a slight notch in the distal 

 edge ; no subunci ; tegumen much reduced ; vinculum wide in its tergal portion, narrow in 

 its sternal portion ; inferior fultura fused to the base of the valves and sheathing the base of the 

 penis ; valves oblong, with two sharp teeth at the apex ; penis shaped like an open S, the upper 

 surface widely open at the base ; uncus and apices of valves pilose. 



The genital armature of inundifera (Text-fig. 65) differs from that of undifera in 

 the shape of the uncus which is bifid and formed of two horn-shaped processes, 



