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 3 the following four 
species are recorded: Chaetodacus caudatus Fabr., C. cucurbitae 
Coq., C. ferrugineus pedestris Bezzi, and Monacrostichus citri- 
cola Bezzi ; to which I subsequently added 3 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 distrib 
1 Ber. Ent. Zeitschr. 26 (1882) 83-120 and 187-252; vide 224-226. 
2 Philip. Journ. Sci. § D 8 (1913) 305-332; vide 321-324. 
3 Bull. Ent. Research 7 (1916) 99-121; vide 113, 115. 
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