378 Mr. A. R. Wallace on 



rich chrome-yellow of the under surface in both sexes at once 

 distinguishes Cramer's species. 



37. Tachjris el'iada, Hewitson. 



Pieris eliada, Hew. Ex. Butt. vol. ii. Pieris IV. f. 27, 28, $. 

 P. liberia, Vol). Mon. Pier. p. 45, pi. 5, f. 4, 2 (nee Cram.). 



^a6.— Batchian, Ceram (Wall.), Obi (Voll.) 



38. Tachyris placidia, Stoll. 



Papillo placidia, Stoll, Svippl. Cr. pi. 28, f. 4, 4c, $. Pieris 

 placidia, Bd. Sp. Gen. p. 4:S3; Voll. Mon. Pier. p. 46, pi. 

 5, f. 5, $. 

 Hab. — Amboina, Batchian, Ceram, Morty, Waigiou (Wall.) ; 



Gilolo, Ternate (Voll.). 



A curious species, with a peculiarity of colour hardly to be 

 found elsewhere among Lepidoptera. 



39. jTachyris falima, Vollenhoven. 

 Pieris fatima, Voll. Tijd. v. Ent. 186G, p. 59, pi. 2, f. 1, 2, $. 

 JS^ab. — Celebes (Leyden Mus.). 



This fine new species seems closely allied to the hitherto 

 isolated T. j^lacidia. 



c. Nero group. 

 40. Tachyris nero, Fabricius. 



Papilio nero, Fab. Ent. Syst. III. i. p. 153. Pieris nero, Bd. Sp. 



Gen. p. 485. 

 Pieris thjria, Horsf. Zool. Journ. iv. p. 69, t. 4, f. 2. 

 Mab. — N. India, Singapore, Sumatra, Java, Borneo (Coll. 

 Wall.). 



The specimens vary considerably in tint and in size, and slightly 

 in form, but there are no well marked races in any of the above 

 localities. The Borneo specimens seem to have rather acuter and 

 more falcate wings. 



41. Tachyris galba, n. sp. 

 Male. — Wings much more acute than T. nero, but less so than 



