J. W. H. Harrison 



21 



aedoeagus may be perceived the Vesica, armed near the orifice with a 

 comb-like band of spines which we call the Cornuti. 



To the right and left of the genitalia are spread the two Valves 

 (Valvae) or clasps ; these also are strongly chitinised. Toward what, 

 in the sketch, seems to be their inner margin, they are raised and 

 thickened ; to this inner margin the name Costa is given. 



Fig. 1, Male genitalia of L. ursaria. 



r/= the Uncus. F, F' = the Valves. G = the Gnathos. i^=theFurca. 



S=the Saccus at the base of the Tegumen. F=the Vesica. C=ihe Cornuti. 



On the whole, the stiff armature of bristles spreads outward or 

 rather, when the structures are in situ, downward. A small patch more 

 closely set, however, at the tip points in the reverse direction. This 

 minute patch characterises the whole sub-family and is of considerable 

 phylogenetical importance. 



Basally, between the two valves can be made out a thin flask-shaped 

 plate of chitin, probably, when functional, of use as a penis guide. 



Female structures. Text-fig. 2, female genitalia of L. hyb. hidli. 



For similar simplicity I have chosen to figure the abdomen of a 

 female hybrid L. hyb. hulli. 



On account of the enormous development of the ovipositor, the 

 segmentation of the female abdomen, which, in the majority of Lepi- 



