xvm. 



plan, although greatly modified in detail, and a reduction 

 and simplication of names be arrived at, which is much 

 to be desired. 



It is necessary at this point to refer to some 

 characteristic features of the Tortricid genitalia. One very 

 distinctive character is the form of the penis, which is 

 cardinate or hinged, and much curved. It bears a strong 

 resemblence to a pistol, and we have already noticed the 

 curious occurrence of this form at the end of the Geometers, 

 in the Chesiadince. Dealing with external parts of the 

 tenth abdominal segment in the male, we note that the 

 uncus is largely undeveloped, and, with the exception of a 

 few groups, the same may be said of the gnathos. On the 

 other hand the socii are generally large and prominent; 

 they may be erect bergmanniana pi. vi., or drooping osseana 

 pi. vi., the latter being the more usual form. The 

 transtilla is strongly developed in some of the groups. 

 The anus is generally a thin membraneous tube. In the 

 ninth segment, the tegumen (with the exception of its 

 ventral portion, the saccus), is strongly developed. The 

 iatter is very short, and in the group PJialoniadii, we find 

 it in a very instructive condition. Here the two arms of 

 the saccus are disconnected, and in certain Tineidce they 

 are similarly disconnected, and also very long. From this 

 it seems clear that the saccus is really a development of 

 the two projections which hinge the body segments 

 together, and which are so conspicuously developed in the 

 anal segments of the female. We have also found examples 

 where these connecting rods unite the uncus and gnathos 

 in the ninth segment. 



In the valvae, the costa, valvula, and sacculus are almost 

 universally fused together. A striking exception to this is 

 found amongst the species of the genus Phalonia. Here in 

 three of Hie four species the costa leaves the valvula 

 completely, and, entirely altering its position, seems to 



