236 



MUSCID^E. 



;. Punctum, Meig. Zw. vi. 98. 10 (1830); Mcq. ; Zett. Cana, 

 capite flavo, antennis nigris basi fulvis, thorace piceo-trivittato, alis cine- 

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

 fulvo. Long. 1 ; alar. 2|- lin. 



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

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

 three piceous stripes. 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 length from the border. Halteres 

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



Not common. (E.) 



The following additional species of Diastata have been recorded 

 as British : 



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



Genus IV. DROSOPHILA. 



DROSOPHILA, Fal. Geomyz. (1820); Meig.; Mcq.; Westw.; Zett. 

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



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



transversum, breve, thoracis latitudine. Antenna facie breviores; 



articulus tertius sublinearis ; arista setis lateralibus qumque 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. Antenna 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 ; prsebrachial ending at the tip of 

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

 by nearly thrice its length from the prsebrachial 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 thickness. Male. Abdomen linear. Fern. Abdomen ellip- 

 tical or fusiform. 



The larvae of JDrosop&ila feed on plants, Boleti, oak-apples, and 

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

 of Lrosophila are dark (D. graminum), and are found upon the 

 Caryophyttea, while the larger kinds only frequent Orucifera. 



