Taxonomic value of Genital Armature in Lepidoptera. 333 



tremity with a stout downward curved hook ; the fulcrum 

 is absent doubtless because the very unusual shape of the 

 aedoeagus would render it useless unless it were enormously 

 developed. The aedoeagus is angled sharply near its 

 rather ample base at right angles, where it ascends and in 

 a deep bold curve is then bent over and produced forwards 

 as a long strong tapering horn and terminates in a pointed 



The only genus with w^hich I am yet acquainted that has 

 any resemblance in its tegumen to Mimacraea is Arrugia ; 

 in hasuta the tegumen somewhat approaches the shape of 

 its lateral lobes but is very dissimilar in its other parts ; 

 its fore lobes are somewhat like those just described, but 

 the rear portion of the tegumen is normally constructed, 

 being entirely hooded over. In this genus, however, the 

 tergite and sternite have their own organs ; beneath the 

 lobes at their inner extremity the falces rise and are two 

 powerful horns deeply curved, whilst directly below them, 

 more or less parallel as to position, are a pair of shorter 

 curved arms edged on the upper margin with short sharp 

 teeth, these form the lower margin of the tergite section. 

 The clasps are large and broad, roughly Plebeid in shape, 

 but without the apical incision; the fulcrum is long 

 straight and obhque; the aedoeagus is a shortish broad 

 tube straight on its upper margin, waved on its lower 

 margin, slightly tapered at its apex, with a finely shagreened 

 vesica ; there is a broad collar fixed in the girdle through 

 which it passes ; the girdle is very narrow and irregular 

 with fine lateral curtains and with a prominent saccus. It 

 will thus be seen that whilst the armature points to a strong 

 Liptenine origin there is yet something apparent in the 

 clasps and saccus of a Kuraline character. 



The American Fenisca tarquinia, as also the Eastern 

 Spalgis epius, have carnivorous larvae and peculiar 

 facies of their own, both however have Ruralid 

 armature, though developed on lines of their own in some 

 respects. 



Fenisca tarquiniiis, Fab. (PI. LXV, fig. 46). 



This has the tegumen hooded and strongly developed 

 forwards, its front apex having a slight rounded excava- 

 tion ; it has the usual falces ; the clasps are subtriangular 

 and are bridged over by a narrow elevated chitinous collar 

 from the apex of the triangle; the front tip is strongly 



