THE PHILIPPINE 



Journal of Science 



Vol. XV NOVEMBER, 1919 No. 5 



FRUIT FLIES OF THE GENUS DACUS SENSU LATIORE 

 (DIPTERA) FROM THE PHILIPPINE ISLANDS 



By M. Bezzi 

 Of Turin, Italy 



TWO PLATES 



In his paper of 1882 on the Philippine Diptera, Osten-Sacken 1 

 recorded only two species of Dacus from the Islands. One of 

 these, Dacus icarus O.-S., is a trypaneid belonging to the very 

 different genus Callistomyia Bezzi, 1913. The other, "Dacus 

 ferrugineus (Wied.) Macq.," is evidently a complex of several 

 species of the true genus Dacus sensu latiore, which may belong 

 to one or another of the forms here now distinguished under the 

 names of Chaetodacus dorsalis, C. occipitalis, C. pedestris, C. 

 limbiferus, C. scutellinus, and C. pubescens. 



In my studies on Philippine Diptera I, 2 the following four 

 species are recorded : Chaetodacus caudatus Fabr., C. cucurbitae 

 Coq., C. ferrugineus pedestris Bezzi, and Monaerostichus citri- 

 cola Bezzi; to which I subsequently added 8 Chaetodacus scutel- 

 linus Bezzi, Mellesis pedunculata Bezzi, and M. nummularia 

 Bezzi. 



Through the kindness of Prof. C. F. Baker, of the University 

 of the Philippines, Los Banos, and of Mr. R. C. McGregor, of 

 the Bureau of Science, Manila, I have received rich material of 

 fruit flies of the genus Dacus sensu latiore, from the Philippine 

 Islands. With this material at hand, we now have a better 

 knowledge of the systematic relationships and of the distribu- 

 ter. Ent. Zeitschr. 26 (1882) 83-120 and 187-252; vide 224-226. 

 * Philip. Journ. Sci. § D 8 (1913) 305-332; vide 321-324. 

 'Bull. Ent. Research 7 (1916) 99-121; vide 113, 115. 



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