11 



the side pieces are separated, they are still to be treated 

 as forming the uncus. The central hook of the uncus 

 may be 



Simple, 



Sickleform, 



Cygnated, 



Tongue shaped, 



Diamond form, 



Spatulate, 



Mandibulate. 



It is doubtful what is the exact use of the uncus ; 

 generally it is presumed to grasp the female dorsally. 

 It has also been suggested that it is thrown back and 

 acts as a guide, sometimes fitting between the lobes of 

 the ovipositor of the female. 



On either side of the tegumen laterally, in the 

 vicinity of the articulation is a lobed process, densely 

 clothed with hairs which I call The Peilictllus ; 

 and which appears to act as a brush to the penis. The 

 basal portion of the ring of the tegumen, which I have 

 called The Vincillum, varies considerably in form, 

 being generally pointed ventrally ; the point being some- 

 times enormously extended (e.g. Apatura iris). Below 

 the articulation of the tegumen, are hinged, on either 

 side the two large wing like processes which form 

 The Hafpes. For convenience I have divided these 

 irtto three portions, upper, lower and central, although 

 the divisions are sometimes difficult to define. The upper 

 part, which I have called The CucullllS is sometimes 

 divided, i.e., plainly differentiated from the central 

 portion by a fold or groove. The Cucullus may be 



Peaked, 

 Bifurcate, 

 Trigonate, 

 Battledore shaped. 



