14 



ME. F. WALKER ON DIPTERA COLLECTED AT 



streak extending from the base to one-third of the length ; a black 

 broad irregular oblique band beyond the middle ; veins black ; discal 

 transverse vein straight, parted by less than half its length from the 

 border, and by about its length from the very oblique praebrachial 

 transverse vein, which equals it in length ; halteres white. Length of 

 the body 6 lines ; of the wings 10 lines. 



46. Dacus furcifer, n. s. Mas. Anthracina, cinereo-tomentosa, 

 antennis vix longis, arista plumosa, thorace vittis tribus nigricantibus, 

 pedibus longiusculis, alis cinereis nigro bifasciatis, fascia 2 a latissima, 

 linea costali exteriore apicem versus furcata, halteribus albis. 



Male. Coal-black, with cinereous tomentum ; third joint of the antennae 

 slightly tapering from the base to the tip, much shorter than the face ; 

 arista plumose ; thorax with three blackish stripes ; abdomen linear, 

 narrower and very much longer than the thorax; legs rather long; wings 

 cinereous ; apical part of the costa with a black line, which emits a 

 fork towards the tip ; a narrow black oblique band before the middle, 

 and beyond the middle a very broad black band, which is oblique in 

 the contrary direction ; veins black ; discal transverse vein very slightly 

 curved outward, parted by about one-fourth of its length from the 

 border, and by less than its length from the straight, upright praebra- 

 chial vein, which is not more than half its length ; halteres white. 

 Length of the body 5 lines ; of the wings 10 lines. 



47. Dacus expertus, n. s. Faim. Cyaneus, palpis, antennis pedibus- 

 que nigris, thorace vittis tribus cinereis, pedibus breviusculis, alis 

 cinereis, costa exteriore apicibusque nigris, venis transversis nigro 

 marginatis, halteribus testaceis. 



Female. Dark blue ; palpi, antennae, and legs black ; 3rd joint of the 

 antennae linear, slender, extending to the peristoma ; thorax with three 

 cinereous stripes ; pectus cinereous ; abdomen elongate-conical, a 

 little longer and narrower than the thorax ; legs short, stout ; wings 

 cinereous, black along the exterior part of. the costa and about the 

 tips ; transverse veins clouded with black ; discal transverse vein 

 almost straight, parted by about half its length from the border and 

 by about its length from the praebrachial transverse vein, which is 

 oblique ; halteres testaceous. Length of the body 4 lines ; of the 

 wings 8 lines. 



48. Dacus perplexus, n. s. Faim. Niger, capite luteo, facie nigro 

 bif_'uttata, antennis luteis longis, arista nigra nuda, thorace vittis tribus 

 luteis, pectore maculis duabus trigonis luteis, abdomine fulvo lato 

 striga brevi nigricante, pedibus luteis, alis limpidis, striga basali, vitta 

 costali dentata vittaque postica angulata fuscis. 



Female. Black ; head pale luteous, with a piceous dot on the front, and 

 with a round black dot on each side of the face ; 3rd joint of the 

 Mitennae extending to the peristoma, very slightly tapering from the 

 bate to the tip; arista black, bare ; thorax with a luteous stripe, with 



