240 MUSCID.'E. 



tertius subrotundus ; arista trisetosa. Thorax ellipticus. yllce lon- 



gae, vena discali transversa nulla. Abdomen tliorace pauUo longius 



Bt angustius. Pedes graciles. 



Body slender, shining, almost bare. Head and thorax convex. 

 Head transverse, a little broader than the thorax. Front broad. Face 

 vertical. Eyes nearly round. Antennae very short ; tirst and second 

 joints very small ; third nearly round ; arista setiform, very slender, 

 with three hairs on the upper side. Thorax elliptical. Wings long, 

 moderately broad ; costal vein ending at very little behind the tip of 

 the wing ; subcostal ending at about one-fourth of the length ; radial 

 ending at hardly one-fourth of the length ; cubital ending at the tip ; 

 prffibrachial very slightly curved upward, ending at the tip of the 

 costal ; prcebrachial transverse very near the base of the wing ; no cUs- 

 cal transverse vein. Abdomen nearly linear, a little longer and nar- 

 rower than the thorax. Legs slender. 



These insects dwell among herbage ; they are very small, and 

 of feeble structure and flight. 



1. am(£na, Meig. Zw. vi. 89. 1 (1830); Mcq. ; Zett. Nigra, ca- 

 pite autico, thoracis lateribus scutello pectoreque pallide flavis, antennis, 

 halteribus pedibusque flavis, alis linipidis, abdomine fulvo nigro-vario. 

 Long, f-1 ; alar. 2i— 2|^ lin. 



Black. Head in front and beneath, sides of the thorax, scutellum, 

 and pectus pale-yellow. Antenna?, halteres, and legs yellow. Wings 

 limpid ; veins pale testaceous. Abdomen tawny, more or less black 

 above. 



Common ; may be frequently found on windows and in hay- 

 stacks. (E.S.I.) 



Asteia concinna, Meig., and the following additional genera and 

 species have been recorded as British : — 



Leucopis, Meig. Leptomyza, 3Icq. Tethnia, Hal. 



1. puncticornis, Meig. 1. gracihs, Tal. 1. illota, Hal. 



2. obscura, Hal. 



Subfamily 9. PHITOMYZIDES. 



Alarum vena subcostalis et mediastinalis conjimctce ; radialis apicem fere 

 attingens ; discalis transversa ab margine remota ; areola pohracldalis 

 et analis distinda, longm. Metatarsi jwstici graciles. 

 Subcostal and mediastinal veins united ; radial ending at much beyond 



three-fourths of the length of the wing ; discal transverse parted by full 



twice its length from, the border ; pobrachial and anal areolets distinct, 



long. Hind metatarsi slender. 



The species of this subfamily are very numerous, and arc all 



of very small size ; their larvfe undermine and feed on tlie leaves 



