Studies in Fruit Flies. Part L Dacini — HARDY AND AdACHI 
165 
been adequately described and figured by 
Hardy (1949: 185). 
The specimens from the Philippines and 
Borneo exhibit considerable variations in the 
development of the scutellar bristles. A num- 
ber of specimens have been studied which 
possessed four well- developed scutellar bris- 
tles. These would fit the concept of Dacus 
{Zeugodacus) (genus Zeugodacus of other au- 
thors). Many specimens have the outer scu- 
tellars small but definitely present. Other 
specimens have three scutellars present, and 
the typical specimens have but two. I have 
also seen these same variations in specimens 
from India. 
Many thousands of specimens have been 
seen from the following localities. 
Philippine Islands: Dumaguete City, Ne- 
gros, Oriental Prov., Negros, Apr., 1950, ex 
Momordica charantia L. and Luffa cylindrica 
Roem. (F. E. Skinner); Cebu City, Cebu, 
July, 1950, ex Momordica charantia L. (F. E. 
Skinner); Luzon, Sept.-Oct., 1947 (Q. C. 
Chock); Del Monte, Mindanao, Jan., 1950, 
ex cucumber (F. E. Skinner); Davao, Min- 
danao, Mar.-Aug., 1950, ex cucumber and 
Momordica charantia L. (F. E. Skinner) ; Pangi, 
Mindanao, Feb.-Sept., 1950, ex Momordica 
charantia L. and ex "Ampalayo” (F. E. Skin- 
ner); Camatayan, Misamis Oriental, Minda- 
nao, Dec., 1949, ex Trichosanthes sp. (F. E. 
Skinner); Gamalang, Davao Prov., Minda- 
nao, Sept., 1950, 1,000 feet, ex Luffa cylindrica 
Roem. and Momordica charantia L. (F. E. 
Skinner); Padada, Davao Prov., Mindanao, 
May, 1950, 100 feet, ex Momordica charantia 
L. (F. E. Skinner); Sasa, Davao Prov., Min- 
danao, Aug., 1950, ex watermelon and musk- 
melon (F. E. Skinner); Pasay, Feb., 1947 (Q. 
C. Chock); Batangas, Aug., 1947 (Q. C. 
Chock). 
Borneo: Tamparuli, Jan.-June, 1951, ex 
Luffa acutangula {^'Potold'), cucumber, Mo- 
mordica charantia^ Lagenaria leucantha, Arto- 
carpus integra, Baccaurea angulata, guava, and 
mango (F. E. Skinner and G. Angalet); Tu- 
aran, Jan.-June, 1951, ex cucumber, Solanum 
sp., Momordica charantia^ Artocarpus integra. 
mango, carambola, and Eugenia javanica (F, 
E. Skinner and G. Angalet); Mengetel, June, 
1951, ex Averrhoa carambola and mango (G. 
Angalet); Papar, Nov., 1950-Jan., 1951, ex 
Luffa acutangula and Momordica charantia (F. 
E. Skinner); Kota Baru, May, 1951, ex Eu- 
genia javanica, guava, and papaya (G. An- 
galet); Kota Belud, June, 1951, ex Draconto- 
melum dao and Cucurhita maxima (G. Angalet) ; 
Jesselton, July, 1951, ex Luffa acutangula and 
mango (G. Angalet). 
Malaya; Kuala Lumpur, Apr., 1948-Mar., 
1949, ex Benincasa cerifera, Momordica charan- 
tia, cowpea pods, and Trichosanthes anguina 
(N. L. H. Krauss); Singapore, Apr., 1949, ex 
wax gourd (N. L. H. Krauss); Titi, Negri 
Sembilan, June, 1948, ex Momordica charantia 
(N. L. H. Krauss); Serdang, Selangor, June, 
1948-Feb., 1949, ex cucumber, Luffa cylin- 
drica, and L. acutangula (N. L. H. Krauss). 
The following parasites were reared from 
this species: from Malaya — Opius fletcheri Sil- 
vestri, Spalangia spp..^, and Tachinaephagus 
spp..^; from Borneo — Opius vandenhoschi Fulla- 
way, 0. angaleti Fullaway, Spalangia spp..^, 
Syntomosphyrum indicum Silvestri, Pachycrep- 
oideus dubius Ashmead, and Trybliographa dad 
Weld; from the Philippine Islands— 
fletcheri Silvestri, 0. longicaudatus (Ashmead), 
Spalangia sp..?, and Pachycrepoideus dubius 
Ashmead. 
Dacus (Strumeta) dorsalis Hendel 
Figs. 8, 15^ 
Dacus dorsalis 1912, Suppl. Ent. 1; 18. 
The typical form of dorsalis will be dis- 
cussed in more detail in a study which is 
underway on the dorsalis complex of species. 
The Malayan, Philippine, and Borneo spec- 
imens show considerable variation in the 
width of the costal band, and the majority 
fit the variety occipitalis (Bezzi) more closely 
than they do the typical form. The species is 
closely related to D. pedestris (Bezzi) and is 
best separated by comparing the ovipositors. 
