214 MR. F. WALKER ON DIPTERA COLLECTED IN 



ratis, abdomine longo subcylindrico maculis tluabus anticis lividis, 

 pedibus longis, tibiis posticis pallide piceis, alls angustis obscure 

 cinereis apices versus nigricantibus. 

 Male. Black, slender, with black bristles. Head whitish, slightly 

 gilded, with two long bristles on the hind border of the vertex ; 

 frontalia deep black, linear ; facialia without bristles ; epistoma 

 slightly prominent. Eyes bare. Antenna3 reaching the epistoma ; 

 3rd joint linear, rounded at the tip, twice the length of the 2nd ; arista 

 slender, much longer than the 3rd joint. Thorax with three approxi- 

 mate cinereous slightly gilded stripes, of which the middle one is much 

 broader than the others ; pectus with an oblique slightly gilded streak 

 on each side. Abdomen much longer than the thorax, nearly cylin- 

 drical, slightly thicker hindward, with a large livid spot on each side 

 near the base ; fore borders of the 2nd and 3rd segments and tip 

 cinereous. Legs long ; hind tibiae pale piceous. Wings narrow, 

 dark cinereous, blackish for nearly half the length from the tips; 

 veins black ; praebrachial vein forming an obtuse angle, and emitting 

 a very short branch at its flexure, slightly undulating thence to its 

 tip, which joins the cubital vein near the tip of the latter; discal 

 transverse vein slightly undulating, parted by less than half its length 

 from the border, and by more than half its length from the flexure of 

 the praebrachial vein ; alulae pale cinereous. Length of the body 8 

 lines; of the wings 14 lines. 



Subfam. Dextdes. Walk. 



Gen. Dexia, Meigen. 



58. Dexia alidifera, Walk. See Vol. V. p. 157. 



G-en. Prosena, >S^^. Farg. 



59. Prosena argentata. Walk. See Vol. IIL p. 102. 



Subfam. Sarcophagides, WalTc. 



Gen. Sarcophaga, Meigen. 



60. Sarcophaga innotata, n. s. Fam. Nigra, capite albido, fron- 

 talibus atris, thorace vittis duabus lateribus pectoreque cinereis, abdo- 

 mine cano subtessellato, alis cinereis, alulis albis. 



Female. Black. Head whitish ; frontalia deep black, linear. Thorax 

 with two cinereous stripes ; sides and pectus also cinereous. Abdomen 

 slightly tessellated with hoary, shining, notched patches. Wings 

 cinereous ; veins black ; praebrachial vein forming a sharply formed 

 right angle at its flexure, nearly straight thence to its tip; discal 

 transverse vein very slightly undulating, parted by more than half its 

 length from the border and from the flexure of the praebrachial vein ; 

 alulae white. Length of the body 6 lines ; of the wings 10 lines. 



