LIST OF DIPTERA. 



lower cross-vein straight, separated by its length from the middle 

 cross-vein, slightly oblique ; poisers tawny. Length of the body 

 2j lines ; of the wings 4% lines. 



Group IV. Oxyphora, Desv. Essai Myod. 757. 



Trypeta Westermanni, Meig. Dipt. v. 333, 32, pi. 1, /. 6. Loeiv, 

 Germ. Zeit. Ent. v. 365, 34. Musca vinulus ? Harr. Ex. 117, 

 pi. 34, /. 21. Oxyphora Cardui, Desv. Essai Myod. 757, 2. 

 O. Westermanni, Walk. Ent. Mag. iii. (31, 1, pi. 1, /. 2. Te- 

 phritis Westermanni, Macq. Hist. Nat. Dipt. ii. 461, 2.. 



a. ? 



Trypeta Donysa, n. s. Fusca, capite fulvo, thoracis lateribus ah- 

 domineque ferrugineis, hujus lateribus piceo vittatis, palpis 

 antennis pedibusque fulvis, alis fuscis disco maculis fulvis mar- 

 gineque maculis limpidis omatis. 



Head and chest beset with a few black bristles : head tawny, 

 broad ; face large, concave, its sides without bristles ; epistoma pro- 

 minent ; peristoma pale yellow : eyes pitchy, slightly convex ; all 

 the facets of moderate size : sucker and palpi tawny : feelers bright 

 tawny, not more than half the length of the face ; third joint deep, 

 slightly concave above, equally convex beneath, truncated at the tip, 

 rather more than twice the length of the second ; bristle black, taw- 

 ny and stout towards the base : chest and breast dark brown, clothed 

 with short tawny hairs ; sides ferruginous : abdomen ferruginous, 

 linear, pitchy along each side, a little narrower but hardly longer 

 than the chest ; hind borders of the segments tawny : legs tawny, 

 clothed with short pale hairs ; claws black ; foot-cushions pale 

 tawny : wings dark brown, rather broad, with some dark tawny 

 marks in the disk, adorned with twelve or fourteen irregular colour- 

 less spots, which are disposed along the border, with the exception 

 of a round dot near the middle cross-vein ; wing-ribs and veins fer- 

 ruginous ; all the longitudinal veins slightly waving ; lower cross- 

 vein long, rather near the hind border, straight, with the exception 

 of the upper end, which is very slightly curved outward ; middle 

 cross-vein very slightly curved outward, separated by much more 

 than its length from the lower cross-vein ; poisers ferruginous. 

 Length of the body 3£ lines ; of the wings 8 lines. 



