Mr. II. M. Bcrnaicl on the Apodemes o/'Apiis cOt\ 67 



Tliis species cannot well be confused with any other of the 

 Australian Mthimpmlkv. By the prominent subapical 

 spotting of the tegmina it is somewhat allied to M. unibri- 

 margOy Walk., and J/, converycns^ Walk., but with both 

 tiiese species it has nothing else in common. 



Synonymical Notes. 



Tympanoterpes sodalis. 



Cicada sodalis, "Walk. List Iloin. i. p. 108. ii. 9 (\BbQ),= Fidicina vidtur, 

 Walk. Ins. Saund. Horn. p. 10 (1858). 



Melampsalta mangu, B. White, Ent. Month. Mag. vol. xv. 

 p. 214. n. 6o [ISld) , = Melampsalta nervosa^ Walk. 

 List Hom. i. p. 213. n. IGG 



Tihicina lacteipennis, Puton, Hev. d'Ent. ii. p. 45 (1883). 

 N. Persia. 



This name is already preoccupied in the genus Tihicen by 

 T. [Cephaloxys) lacteijjennis^ Walk. List Hom. i. p. 237. 

 n. 8 (1850), described from North India. I therefore propose 

 to rename the Persian species as T. Patoni. 



YIII. — The Apodemes of Apus and the Ejidophragmal System 

 o/Astucus. By Henry M. Beenakd, M.A. Cantab. 



[Plate v.] 



The endophragmal system of Astacus has been a considerable 

 puzzle to all who have studied the subject. Though the 

 elements of which it is made up are clearly seen to be folds of 

 the outer skin, in some way connected with segmental con- 

 strictions, it has never been understood how they arose. No 

 muscles are apparent which could have drawn them in ; 

 indeed, someof those attached to them, e.g. the coxal muscles, 

 pull in the opposite direction, i. e. tend to straighten the skin 

 and not to draw it into folds. 



When attempting lately to show * that Ajnis is a primitive 

 Crustacean nearly related to the Annelids, 1 was many times 

 struck with the close resemblance between it and the Ma- 

 crurous Decapod Crustaceans, and could not refrain from 



* " The Apodidcc." MacmUlan, 1802. 



5* 



