ME. WALKEE ON DTPTERA COLLECTED AT MAKESSAR. 149 



with black shining testaceous-bordered spots ; scutellum 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 subapical 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 prsebrachial transverse ; halter ps white. Length of 

 the body 2^ lines ; of the wings 4| hues. 



Gen. Dacus, Fabr. 



176. Dacus DiVERGENS, n. s. Mas, Purpureus, longus, angustus; 

 fronte tumida, facie carinata fulvo maculata, palpis fulvis, antennis 

 piceis, arista alba subpubescente, thorace vittis tribus cinereis, ab- 

 domine fusiformi apicem versus cylindrico et cyaneo, pedibus piceo- 

 nigris, femoribus fulvis, tarsis posticis rufescentibus, alis cinereis 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 tawny 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 prsebrachial veins ; veins black ; praebrachial vein very slightly 

 undulating ; discal transverse vein curved outward, parted by one- 

 fourth of its length from the border, and by much more than its length 

 from the oblique prsebrachial transverse ; halteres whitish yellow. 

 Length of the body 7 lines ; of the wings 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. Olece. Some of the 

 following species may belong to Senopterina, Macq. 



177. Dacus addens, n. s. Fcem. Cyaneu^, longus, angustus, capite 

 nigro, facie plana perobliqua, arista cinerea nuda, thorace vittis tribus 

 cinereis, abdomine seneo-viridi, tibiis tarsis halteribusque nigris, alis 

 cinereis apud costam et apud venam transversam discalem nigrican- 

 tibus. 



