132 



NOVITATBS ZOOLO&ICAB XXIII. 1916. 



text-fig. 11 gives a lateral view, while in text-fig. 12 we look at it from the anal 

 side and slightly from above, conceals the ninth tergite and its appendages, and 

 must be removed if one wishes to study the latter in toto. Text-fig. 13 represents 

 a dorsal view of the organs. From the lateral portion of the ninth tergite project 

 on each side two processes. The upper one (P 1 ) is large, strongly chitinised and 

 apically divided into two lobes, somewhat resembling a fishtail. The lobes are 

 denticulate at the distal margin, the outer lobe being much longer than the inner 

 one. The second process (P 2 ) is subcylindrical, weak, and bears numerous bristles. 

 Below these processes long silky hairs are found, which are probably spreading hairs 



Fij! 1' 



fio.V2 



VIII t 



X t - 



Text-fig. 11. — Sychesia dryas dryas, lateral view of eighth segment. 

 „ „ 12. — „ ,, ,, anal view of last segments. 



of scent. The lateral clasping organ, the side-clasper, differs in true dryas and the 

 Brazilian subspecies in the development of the apical processes of the harpe (H). 

 We describe first the more widely distributed S. dryas dryas ; in the anal view of 

 the tail-end (text-fig. 12), three processes are visible at each side between the 

 projection of the eighth tergite and the penis-sheath (Pen). These belong to the 

 strongly developed harpe (H). The dorsal process L 1 is glossy, smooth and pale, 

 being often partly concealed by the ninth tergite, as in our figure. The second 

 process L 2 is situated on the proximal side ; it is small and not easily seen ; on the 

 other hand, L 8 is very conspicuous, being very strongly chitinised, deep brown, and 

 so much bent downwards that it usually lies on top of the penis-funnel (Pen). 

 Between L 1 and L 3 , on the outer side, there is a small weakly chitinised lobe bearing 



