166 Proceedings of the Biological Society of Washington. 



Further examination of this work reveals interesting details 

 regarding some of the names of the species treated. For in- 

 stance, the genus Calyptomena and the species Calyptomena 

 viridis, plate 52 and text, were published in June, 1822, and 

 quoted from "Sir T. S. Raffles Cat. of a Zool. Coll. made in 

 Sumatra, Tr. Linn. Soc. XIII, p. 295, 1822." This new genus 

 and species are in the second part of Raffles' paper, which ap- 

 peared in Part II of the Transactions of the Linnean Society 

 of London, volume XIII, which, so Dr. Richmond informs me, 

 did not appear before November, 1822. Horsfield must thus 

 have had access to the proof sheets of Raffles' paper, and his 

 citation and prior publication make it therefore necessary to 

 credit him with both the generic name Calyptomena and the 

 specific name Calyptomena viridis. Fortunately this involves 

 no change of name, but merely of authorit5^ 



The case, however, is somewhat different with Anas arcuata, 

 published here on plate 64. This name has been in common 

 use for a species of Tree Duck from Java and other islands of 

 the East Indies. It is, however, as is readily seen by reference 

 to page [2] of the text to this plate, merely a substitute name 

 for Anasjavanica Horsfield, introduced as follows: "for the name 

 of Anas javanica, originally applied to it, I have substituted 

 the name by which, according to the information communicated 

 to me by M. Temminck, it is distinguished by M. Cuvier, in 

 the Museum of Paris, in the specimens presented by M. Les- 

 chenault." It, therefore, becomes necessary to synonymize 

 Anas arcuata Horsfield with Dendrocygna javanica (Horsfield), 

 and to seek another name for the bird commonly called Dendro- 

 cygna arcuata. Since Anas badia Mulleri is a nomen nudum, 

 the earliest name for the species becomes Dendrocygna vagans 

 Fraser.2 



The case of the generic name Entomothera Horsfield, here first 

 proposed in the text to plate 54, has already been discussed by 

 the writer in a previous publication. ^ Still another species will 

 be treated in another connection. 



iVerhandel. Natur. Gesch. Nederland. oversee, besitt. Land-en Volkenk., 1839-1844, 

 p. 169. 



^Dendrocygna vagans Fraser, Zoologica Typica, 1849, pi. 68 and text (" Manila, Philip- 

 pine Islands") (Eyton MS.). 



3Proc. U. 8. Nat. Mus.. XLVIII, May 18. 1915, p. 642. 



