164 E. Brunetti : Notes on Oriental Diptera. [VOL. I, 



One of the above-mentioned twenty-three species is Diasem- 

 opsis rufithorax Big., represented by a single example in the Indian 

 Museum Collection ; its name appears to be merely a " nomen 

 nudum," as I can find no description of it anywhere. 



A second species by the same author, the description of which 

 is also untraceable, is Diascmopsis fenestratus, likewise in the Indian 

 Museum Collection, but this latter species is certainly only Diopsis 

 quadriguttata Wlk. 



Besides the truly Oriental species, Diopsis arabica, from 

 Arabia, is described by Westwood. 



To those who desire to study this very interesting group may be 

 recommended Westwood's monograph of the species known up to 

 1837 (including Achias, a genus now removed from this sub-family 

 to the Ortalince), published in the Trans. Linnean Soc, lyond., vol. 

 xvii, which volume also contains a short supplement by the same 

 author, giving a few additional species. 



In the " Annales " of the French Entomological Society, vol. 

 iv (series 5), Bigot gives a list of the known species up to 1874. 



Van der Wulp describes the Javan species in Tijd. voor Bnt., 

 vol. xl, 181, with a plate. A revision of the synonymy shows some 

 alterations from this author's South Asian Catalogue, and the 

 following list of species incorporates, I think, the latest results : — 



Diopsis L., 1775, Diss. Upsal. 



1. dalmanni Wied., 1830. Ausser. Zweifl., ii, 560 ; pi. x-a, 4. 



Also figured by Westwood, Tr. Linn. So., xvii, 309 ; pi. 

 ix, 17 ; and pi. xxviii, 8. 



{attenuata Dol.) 1856, Nat. Tijd. Ned. Ind., x, 413 ; pi, viii, 2. 

 {latimana R.) 1875, Ann. Mus. Gen., vii, 445. 

 {lativola R.) 1875, Ann. Mus. Gen., vii, 446. 

 Java, Sumatra Borneo. 



2. confusa Wied., 1830. Ausser. Zweifl., ii, 563. 



{ichneumonea F.) 1805, Antl., 201. 

 nee D. ichneumonea L. , which is an African species. 

 Sumatra. Also occurs on the Congo and in Angola. 



3. circularis Macq., 1835. Hist. Dipt., ii, 486. 



Figured by same author in his Dip. Ex., ii, 3, 239 ; pi, 



xxxii, I, 

 Java, 



4. subfasciata Macq., 1843. Dip. Ex., ii, 3, 238; pi. xxxii, 3, 

 Java. 



5. subnotata Westw., 1848. Cab. Or. Ent., 37; pi. xviii, 2. 



[argentifera Big.) Ann. Soc. Ent. Fr. (5), iv, 112. 

 Celebes, Philippines. 



Four specimens of this species are in the Indian Museum Col- 

 lection (one being named by Bigot as his argentifera) from Tenas- 

 serim, Margherita and Sadiya. 



