MR. WALKER ON DTPTERA COLLECTED AT MAKESSAR. 149 
with black shining testaceous-bordered spots ; scutellura black, shining, 
with a cinereous stripe ; abdomen cinereous-black, oval, tawny on 
each side at the base, a little shorter and narrower than the thorax ; 
hind borders of the segments whitish ; legs black ; tibiae and fore 
femora with a whitish band on each ; wings slightly greyish, with 
several irregular transverse blackish marks near the base, with a broad 
exterior blackish band, which is dilated and contains a whitish streak 
towards the costa, and with an irregular subapieal blackish band; 
veins black ; discal transverse vein nearly straight and upright, parted 
by more than half its length from the border, and by nearly twice its 
length from the praebrachial transverse; halteres white. Length of 
the body lines; of the wings 41 lines. 
Gen. Daces, Fabr. 
1/6. Dacus DivERGENS, n. s. Mas . Purpureus, longus, angustus; 
fronte tumida, facie carinata fulvo maculata, palpis fulvis, antennis 
piceis, arista alba subpubescente, thorace vittis tribus einereis, ab- 
domine fusiformi apieem versus cyliudrico et cyaneo, pedibus piceo- 
nigris, femoribus fulvis, tarsis posticis rufescentibus, alis einereis apices 
versus et apud venas transversas fuscis, halteribus albido-flavis, 
Male. Bluish purple, long, slender; head whitish about the eyes; front 
tumid, convex ; face keeled, with a large elongated tawmy spot ; palpi 
tawny; antennae piceous, reaching the epistoma, tawny at the base ; 
3rd joint linear, conical at the tip, six times the length of the 2nd ; 
arista white, minutely pubescent, very much longer than the 3rd joint ; 
thorax slightly compressed, with three cinereous stripes ; pectus cine- 
reous; abdomen fusiform, cylindrical, and mostly blue towards the 
tip, very much longer than the thorax ; legs piceous black ; femora 
tawny ; hind tarsi reddish except at the tips ; wings cinereous, brown 
on the fore part towards the tips and about the transverse veins, the 
brown part including a curved cinereous streak between the cubital 
and praebrachial veins ; veins black ; praebrachial vein very slightly 
undulating ; discal transverse vein curved outward, parted by one- 
fourtli of its length from the border, and by much more than its length 
from the oblique praebrachial transverse ; halteres whitish yellow. 
Length of the body 7 hues ; of the w ings 12 lines. 
The genus Dacus includes many distinct forms, and will probably be 
soon divided into numerous subgenera ; the characters of the preceding 
species differ much from those of the type, D. Oleae. Some of the 
following species may belong to Senopterina, Macq. 
177- Dacus addens, n. s. Fvem. Cyaneus, longus, angustus, capite 
nigro, facie plana perobliqua, arista cinerea nuda, thorace vittis tribus 
einereis, abdomine seneo-viridi, tibiis tarsis halteribusque nigris, alis 
einereis apud costam et apud venam transversam discalem nigrican- 
tibus. 
