AUSTRO-M ALA YAN DIPTERA 17 



talmia, the species must be called Anaeropsis guttipennis Walker. 

 This author also describes the male only, and thus we do not 

 know whether the female is provided with ocuhferous pedun- 

 cles or not. 



The insect described as Zygoihrica robusta Bigot, Ann. Soc. 

 Entom. 1880, p. 93 (New Guinea), does not belong to that 

 genus, which, as 1 have said in my Enumeration etc. p. 90, 

 is probably related to Drosophila. M/ Bigot's species is an 

 Achias of the elongated type of A. dacoides Walk. ; it may even 

 be the same species. 



A fact, connected with the geographical distribution of the 

 diptera with laterally expanded heads, deserves to be noticed 

 here. New-Guinea, with its dependencies, is the home of the 

 wonderful forms of Achias, Anaeropsis and Laglaisia, while 

 DiopsiSj, so abundantly represented in South Eastern Asia (even 

 in Celebes) , has not yet been found in New Guinea. 



III. Additions and corrections to the « Enumeration » etc. 



p. 7. Sciara sp. (Celebes). A similar, perhaps the same. Sciava 

 with a red thorax, has been recently described by M.'' v. d. 

 Wulp (Midden Sumatra etc. 1881; Diptera p. 6) as S. ru- 

 Jithorax. 



p. 23. Acanthina obesa. I have had occasion since to see the spe- 

 cimen from the Philippines, determined by M.' Walker, and 

 I believe his determination to have been erroneous. The spe- 

 cies has the discal cell hyaline, and is therefore azurea Gerst. 

 or a closely allied species. 



p. 25. Tinda modifera. To the synonymy , add Biastes indicus 

 Walk. Ins. Saund. 81, Tab. Ill, f. 3, which is the older name 

 for the genus and species. The type of Elmma, about which 

 I inquired in the mean time, does not exist any more. 



Ann. da Mus. Civ. di St. Nat. Vol. XVm. (4 Febbraio 1882). 2 



