A MONOGRAPH OF THE PILL'.VILLIPEDES. 273 



This species, which is of not infrequent occurrence in Ceylon, 1 have 

 described at some length in the pages of this journal as cited above. 

 It may be without difl&culty identified by the key to the species of the 

 genus published below. 



The Museum has examples ticketed merely Ceylon (Dr. A. Smith 

 and R. Templeton), and others from Punduloya (E, E. Green). The 

 examples named Z. chitonoides, are labelled Madras (Dr. A. Smith) ; but 

 I suspect this is an error for Ceylon. 



Arthrosphctra rugulosa (Butler). 



Zephron'ta rugulosa, Butler, Ann. Mag. Nat. Hist. (4), X, p. 855, 

 pi. xviii, fig. 1 (1872). 



This species was based upon a small and probably immature specimen 

 from Ceylon (R. Templeton). It seems to diflFer from A. Brandti only 

 in the characters pointed out in the synoptical table (pp. 281, 282). 

 ArthrosphcBra inermis (Humbert). 



SpilicBropcBus inermis, Humbert, Mem. Soc. Phys., Geneve, XVIII, 

 p. 37, pi. iii, fig. 17 (1865). 



Occurring in Ceylon, Pundaloya, &g. This species seems to differ 

 from the preceding merely in the absence of the tooth-bearing rid o-e 

 on the back of the head. 



The Museum has examples ticketed Ceylon (Templeton), Pundaloya 

 (E. E. Green) ; also examples ticketed Madras (Dr. A. Smith), which, 

 like the specimen of A. Brandti mentioned above, are probably errone- 

 ously labelled. 



Arihrosphoera corrugata (Butler). 



Zephronia corrugata, Butler, Ann. Mag. Nat. Hist. (4), X, p. 355, 

 (1872) ; id., Proc. Zool. Soc- Lend., 1873, p. 180, pi. xxi, fig. 8. 



Differs form Z. inermis, Humbert, in having the second tergite and 

 those that succeed it coarsely sculptured to the posterior border. 

 Perhaps it will prove to be merely a variety of A. inermis, in which the 

 extent to which the sculpturing spreads over the tergal plates appears 

 to be variable. 



Locality. — Ceylon (R. Templeton). 



Arthrosphcera lieterostida (Newp,). (PI. A, figs. 3-3b.) 



Zephronia heterosticta, Newport, Ann. Nat. Hist. (1), XIII, p. 265 

 (1844) ; Pocock, Journ. Bombay Nat. Hist. Soc, VII, p. 145, pl. i, 

 fig. 1 (1892). (Excluding synonymy.) 



