's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 245 



The anatomical differences between the species pandocus Moore and 

 nigricans Snell. prove to be not so distinct as in the two preceding spe- 

 cies, but nevertheless they exist. The copulatory organs of the male 

 specimens may be distinguished at a glance by the length of the uncus 

 and that of the valvae. The more size and pattern of the wings offer 

 good systematic characters. Nigricans Snell. is considered not to be a 

 seasonal form of pandocus, because many specimens of both forms have 

 been captured on the same spots and at the same time. Yet Mr. Piepers 

 can only recognize smaller, less developed individuals of pandocus. The 

 figures of pandocus and nigricans, given by Mr. Piepers are showing to 

 us the contrary. I think that nigricans is also distributed in Celebes 

 and that Mr. Fruhstorfer has named those representatives ancus. 



The following species are to be mentioned from Java: 



1. Yptli. jarba de Nicév. 



2. ,, philomela Joh. (= hübneri Piepers & Snell.). 



3. ,, stellera Hew. (== argillosa Snell.), 



4. ,, baldus F. 



5. „ horsfieldii Elw. & Edw. 



6. ,, pandocus Moore. 



7. ,, nigricans Snell. 



Leiden, 1 November 1915. 



M 



(14-XII— lüló) 



