230 MUSCID;. 



Genus V. OSCINIS. 



OSCINIS, Mcq. Oscinis p., F. S. A. (1805) ; Latr. ; Fal. ; Zett. Musca 

 p., F. E. S. ; Gmel. Madiza p., Fal. ; Zett. Chlorops p., Meig. 



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

 prominens. Facies obliqua. Antenna brevissimcs ; articulus tertius 

 subrotundus ; arista nuda. Alee subparvse ; vena pracbrachialis costali 

 juncta. Abdomen subellipticum. Pedes mediocres, postici femoribus 

 gracilibus tibiisque rectis. 



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

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

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

 second; sixth bare. Wings 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 ; praebrachial 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 praebrachial transverse, and by full twice its length from the border. 

 Abdomen nearly elliptical. Legs of moderate length. Hind femora 

 slender. Hind tibiae straight. 



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- 

 gra, robusta, nitens, capite antice subtusque antennis genubusque flavis, 

 alls cinereis sat parvis, halteribus albis. Long, li ; alar. 2 lin. 



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

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

 Halteres white ; knees yellow. 



Not common. (E.) 



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

 gra, capite Jlavo, thorace cinereo-bivittato, alis limpidis, halteribus pedi- 

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



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

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

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

 little behind the tip of the wing ; subcostal ending at hardly one-third 

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



