230 MUSCID^. 



Genus V. OSCINIS. 



OsciNis, Mcq. Oscinis p., F. S. A. (1805) ; Latr. ; Tal. ; Zett. Mtisca 

 p., F. E. S. ; Grnel. Madlza p., Fal. ; Zett. Chlorops p., Meig. 



Corpus sat breve, sublineare. Caput transversum ; vertex plauus. Frons 

 promiuens. Facies obliqua. Antennce hrevminue ; articidus tertius 

 siibrotmidiis ; arista uuda. Alee subparvte ; vena prccbrucliialis costali 

 juncta. Abdomen subellipticum. Pedes mediocres, poslictfemoribus 

 graciUbus tlhllsque rectis. 



Body rather short, nearly linear. Head transverse ; vertex flat. 

 Front prominent. Face oblique. Antennce very short, not near reach- 

 ing the epistoma ; tJiird joint nearly round, twice the length of the 

 second ; sixth bare. Whujs rather small ; costal vein ending at the 

 tip of the wing ; subcostal ending at much beyond one-third of the 

 length ; radial ending at about three-fourths of the length ; cubital 

 ending at a little in front of the tip ; prcebraclual ending at the tip of 

 the costal ; pobrachial ending at much beyond half the length ; discal 

 transverse straight, upright, parted by a little more than its length from 

 the prsebrachial transverse, and by full twice its length from the border. 

 Abdomen nearly elliptical. Legs of moderate length. Hind femora 

 slender. Hind tibia straiyht. 



The characters and habits of this genus much resemble those 

 of Chlorops. The species may be grouped thus : — 

 a. Black. Head yellow. 

 b. Wings grey. Species 1. 

 b b. Wings limpid. Species 2. 

 a a. Greenish-black. Species 3 . 

 a a a. Thorax testaceous, with two brown stripes. Species 4. 



1. palposa, Fal. Oscinid. 6. 7 (1820) ; Meig. ; Mcq. ; Zett. Ni- 

 yra, robusta, nitens, capite antice subtusqiie atitennis genubusque flavis, 

 alis cinereis sat parvis, halteribus albis. Long. 1|- ; alar. 2 lin. 



Black, stout, shining. Head yellow in front and beneath. Antennce 

 yellow. Wings grey, rather short ; veins black, testaceous at the base. 

 Halteres white ; knees yellow. 



Not common. (E.) 



3. cornuta, Fal. Oscinid. 6. 6 (1820); Meig.; Mcq.; Zett. Ni- 

 gra, capite flavo, thorace cinereo-bivittato, alis limjndis, halteribus pedi- 

 busque flavis. Long. 1 ; alar. 2 lin. 



Blach, dull. Head yellow, with a black dot about the ocelli. An- 

 tennae yellow ; fifth and sixth joints black ; fifth long ; sixth stout. 

 Thorax with ttco grey stripes. Wings limpid ; costal vein ending at a 

 little behind the tip of the wing; subcostal ending at hardly one-thii'd 

 of the length ; radial ending at a little beyond two-thirds of the length ; 



