228 MR. F. WALKER ON DIPTER.V COLLECTED IN 



Male. Black, Head bright yellow in front ; epistoma very large. An- 

 tennae reddish ; 3rd joint short, slender, linear ; arista plumose. Tho- 

 rax with a slight cinereous bloom ; scutellum, metathorax, and pectus 

 dark purple or blue, shining. Abdomen fusiform, dark purplish blue, 

 not longer, but very much narrower, than the thorax. Legs piceous ; 

 coxae and femora yellow. Wings black, ample, with a limpid costal 

 space, which is divided by two streaks ; each of the latter has a lurid 

 band ; hind exterior space limpid, with two streaks, of which the first 

 is dilated on each side of the discal transverse vein ; hind border limpid 

 towards the base ; veins black, contorted ; praebrachial transverse vein 

 and discal transverse vein forming a continuous curved line. Length 

 of the body 5 lines ; of the wings 12 lines. 



Gren. Plattstoma, Latr. 



30. Platystoma PROTENSA, n.s. Foem. Ciuerea, capite antennisque 

 lutescentibus, facie alba, thorace vittis sex fuscis, abdomine fasciis 

 piceis, pedibus nigricantibus, alis cinereis fasciis nonnullis interruptis 

 aut guttularibus tribusque integris nigricantibus, halteribus albidis. 



Female. Cinereous. Head dull luteous; face white. Antennre dull 

 luteous, about half the length of the face ; 3rd joint linear, rounded 

 at the tip, full four times the length of the 2nd ; arista setulose at the 

 base. Thorax with six brown stripes. Abdomen oval, a little shorter 

 and narrower than the thorax, with a piceous band on the hind border 

 of each segment. Legs blackish. Wings cinereous, with several 

 blackish bands, which are interrupted or composed of dots, with the 

 exception of the three last j of these the 1st includes the discal trans- 

 verse vein, and is incompletely forked in front ; the 3rd is apical, and 

 is connected with the 2nd on the costa ; discal transverse vein straight, 

 parted by one-fourth of its length from the border, and by very much 

 more than its length from the pra;brachial transverse vein ; halteres 

 whitish. Length of the body 7 lines ; of the wings 14 lines. 



Gen. Dacus, Fabt'. 

 3\. Dacus pectoralis, Walk. See Vol. HL p. 114. 

 .32. Dacus lituratus, fTatt. See Vol. V. p. 251. 



33. Dacus sepedonoides, n. s. Mas. Fulvus, capite macula nigri- 

 cante, oculis albido cinctis, thorace guttis duabns anticis nigris, abdo- 

 mine corapresso subclavato, alis cinereis apud venas fulvis apice nigri- 

 cantibus. 



Male, Tawny. Head whitish along the eyes ; a large triangular blackish 

 spot between the eyes. Antenna; extending beyond the epistoma ; 

 3rd joint shghtly widening towards the tip, full six times the length 

 of the 2nd ; arista bare. Thorax with a black dot on each side of the 

 fore border. Abdomen compressed, subclavate, very much longer and 

 narrower than the thorax. Wings cinereous, tawny along the costa 



