236 MUSCIDiE. 



3. Punctum, Meig. Z\v. vi. 98. 10 (1830); Mcq. ; Zett. Cnna, 

 capite flavo, anteiinis nigins basi fulvis, Ihorace piceo-trivittato, alis cine- 

 reis fusco-variis, halteribus pedibusque testaceis, abdomine piceo disco 

 I'ulvo. Long-. 1 ; alar. 2|^ lin. 



Hoary. Head yellow, whitish in front, beneath, and behind ; vertex 

 grey. Antenna; black ; first and second joints tawny. Thorax with 

 three piceous strijjes. Wings brown in front, more slightly so at the 

 tips, grey along the hind borders, almost limpid in the discs ; veins 

 black ; subcostal vein hardly one-fourth the length of the wing ; discal 

 transverse parted by nearly twice its leng-th from the border. Halteres 

 and legs testaceous. Abdomen piceous ; disc tawny towards the base. 



Not common. (E.) 



The following additional species of Biastata have been recorded 

 as British : — 



1. fulvifrons, Hal. 2. obscuripennis, Meig. 



Genus IV. DROSOPHILA. 



Drosophila, Fal. Geomyz. (1820); Meig.; Mcq.; Weslw. ; Zett. 

 Musca p., F. ; Gmel. ; Pz. Oiitopota, Kby. 



Corpus parvum, breve. Caput et thorax convexa, subsetosa. Caput 



transversum, breve, thoracis liititudine. Ardemiee facie breviores ; 



articulus tertius sublinearis ; arida setis lateralibus quinque vel sex. 



Thorax ellipticus. Alse mediocres. Abdomen thorace vix longius. 



Body small, short. Head and thorax convex, with a few bristles. 

 Head transverse, short, as broad as the thorax. Aniennce. shorter than 

 the face ; first joint very short ; second rather short ; third rather long, 

 nearly linear, oblique at the tip ; arista long, slender, setiform, with 

 five or six hairs on each side. Thorax elliptical. Scutellum obconical. 

 Wings moderately long and broad ; costal vein ending on the hind 

 border at a short distance from the tip ; subcostal ending at about one- 

 fifth of the length; radial ending at about four-fifths of the length; 

 cubital ending at the tip of the wing ; praebrachial ending at the tip of 

 the costal ; discal transverse straight, upright, or slightly oblique, parted 

 by nearly thrice its length from the praebrachial transverse, and by 

 hardly less than its length from the border. Abdomen with seven seg- 

 ments, hardly longer and broader than the thorax. Legs of moderate 

 length and tiiickness. Male. Abdomen linear. Fem. Abdomen ellip- 

 tical or fusiform. 



The larvEC of Brosophila feed on plants^ Boleti, oak-apples, and 

 other substances. Mr. Hardy remarks that all the small species 

 of Drosophila are dark [J), gramiunm), and are found upon the 

 Caryophjllea, wliile the larger kinds only frequent Cruciferdn. 



