On a new Clasinng-organ in a Centipede. 



621 



be, the known facts justify, in mj opinion, the union of 

 Hadrotarsus with the Pacullet>3. 



ant.sc. 



Hadrotarsus scarabcsus (Keys.). 



A. Ventral view of trunk, showing: the anterior scute (ant.sc.) of the 



abdomen, with the epigyne and lung-saes, the membranous band 

 (mb.) with the approximated median tracheal spiracles, the posterior 

 scute (post.sc), and the lateral integumental folds {int.). 



B. Posterior extremity of abdomen from behind, showing the dorsal scute 



{d.sc), the integumental folds {hit.), and the posterior ventral scute 

 { post.sc.) with the cluster of spinners and the anal tubercle above it. 



C. Anterior end of carapace from above, showing the eyes. 



D. Face, showing eyes of anterior line, high clypeus, and mandibles with 



long crossing fangs. 



LXXXIV. — A new Clasping -org an in a Centipede. 

 Bj R. I. POCOCK. 



The African and Oriental Scolopendroid genus Otostigmus is 

 represented in the Neotropical Kegion by a series of species 

 for which I have proposed the name Par otostigmus. In 

 certain species of this genus the males are furnished with a 

 pah- of movable processes, varying in shape according to the 

 species and arising one on each side from the inner surface 

 of the femur of the legs of the posterior pair. The first 

 species to be described with this peculiarity was P. scahri- 

 Cauda, Sauss., from Rio Janeiro. In 1879 Kohlrausch 

 recorded P. scahricauda from Popayan in Colombia, and, 

 following him, I referred to this species specimens from 



