20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 56 



of this piece, and which Lowne afterward adopted, I do not con- 

 sider suitable. 



2. Processus pteralis alee 2 (pi. 8, figs. 23, 24; pi. 9, fig. 25 ; pt3). 

 This process arises dorsally from the remigium. It has the shape of 

 a rectangle with rounded corners, to which an oval piece is attached 

 proximally. This oval piece extends distally to a notch of the 

 remigium, into which it fits. As already stated the rectangular piece 

 is embraced by the processus pteralis alse i. The processus pteralis 

 alse 2 is connected with the processus prgealaris by a ligament. 



pt2 



Fig. 3. View of the proximal part of the remigium from below. Diagram- 

 matic. (Magnification 80.) 



pt. 2, Processus pteraHs alae 2. 

 pt. 3, Processus pteraHs alse 3. 



3. Processus pteralis alee 5 (pi. 9, fig. 26; text fig. 3; pt^). This 

 process is attached ventrally to the remigium. Its form reminds 

 one of a compressed cornet or cone with oval base. It might be 

 considered as having arisen from the ventral border of the remigium, 

 which is, in this region, trough-shaped, being bent outward. The 

 anal part of the curved surface is strongly chitinized, the part turned 

 toward the marginal vein only slightly so, and compressed. 



The head of pterale C fits into this strongly chitinized cavity, and 

 thus the asymmetrical form of this pterale finds its explanation in 

 the asymmetry of the processus pteralis alaj 3. 



