1887.] MR. F. E. BEDDARD ON BRACHYURUS CALVUS. 1 19 



EXPLANATION OF THE PLATES. 

 Plate X. 



Fig. 1 . Demotina semifasciata, p. 70. 



2. Pagria costati'pennis, p. 73. 



3. Bhyparida quinqiiemaculata, p. 75. 



4. Kodostoma tuberosum, p. 78. 



5. BermorrJiytis igneofasciata, p. 83. 



6. omatissima, p. 82. 



7. ceylmiensis, p. 81. 



8. Chahria nigroplagiata, p. 93. 



9. apicicornis, p. 93. 



10. Pexodorus ccylonensis, p. 95. 



11. Ivalia metallioa, p. 100. 



12. mridipemiis, p. 100. 



Plate XL 



Fig. 1. Aulacophora stevensi, p. 103. 



2, 3. nigripeta, p. 103. 



4. Ncochrolea cavifrons, p. 117. 



6. 6. Haplotia varipennis, p. 118, 



7. Antipha nietneri, p. 118. 



8. Metrioidea riifipennis, p. 114. 



9. Xenarthra mirahilis, p. 107. 



10. /ewisi, p. 108. 



11. imicolor, p. 109. 



12. Gcdemcella ceylonensh, p. 105. 



3. Notes on Brachyurus calvus. By Frank E. BeddakDj 

 M.A., F.R.S.E., Prosector to the Society. 



[Eeceived January 13, 1887-] 

 (Plate XII.) 



The accompanying drawing (Plate XII.) represents the external 

 characters of the male Brachyurus calvus which died in the Society's 

 Gardens on July 2 1 last year. I have taken the opportunity of com- 

 paring the structure of this species with the closely-allied B. rubi- 

 cundus, which has been carefully described by Forbes in his memoir 

 ou the Ouakari Monkeys*. 



The genus Brachyurus contains three species^, of which two, 

 viz. B. calvus and B. rubicundus, agree very closely in external 

 characters, and, as I shall presently show, in internal structure ; 

 while the third, B. melanocephalus, differs more in external characters 

 from the other two than they do from each other. 



Mr. Forbes has given a detailed account of the external characters 

 of B. rubicundus, and the main external characters of all the species 

 are referred to by Schlegel ^. The general coloration of the back is a 

 whitish grey, produced by a mixture of white and black hairs, the 

 white predominating ; passing from the dorsal to the ventral surface 



1 P.Z.S. 1880, p. 627. 



^ Schlegel' " Pithecia alba " was believed by Mr. Forbes to be identical with 

 B. calvus. 



3 Museum des Pays-Bas, 1876, p. 227 et scq. 



