MUSCA. Ill 



11. domestica, L. Fn. 1833 (1761); F.; Schr.; Gmel; Fal.; 

 Meig. ; Desv. ; Mcq. ; Zett. Nigra, cinereo-tomentosa, capite argen- 

 tato, thorace quadrivittato, alls subcinereis, abdomine subtesseUato 

 subtus pallido. Long. 3-3^ ; alar. 6-7 lin. 



HOUSE FLY. Black, with grey tomentum. Head somewhat silvery 

 in front ; frontalia ferruginous in front ; facialia bristly for one-third of 

 the length ; epistoma not prominent. Antennae not reaching the epi- 

 stoma; third joint slender, full four times the length of the second; sixth 

 plumose to three-fourths of the length. Thorax with four black stripes. 

 Wings almost limpid; prsebrachial vein forming a rounded obtuse 

 angle at its flexure, nearly straight from thence to the tip ; discal trans- 

 verse vein nearly straight, parted by its length from the flexure of the 

 prasbrachial, and by more than half its length from the border. Alulse 

 whitish. Abdomen slightly tessellated, testaceous beneath. 



Everywhere abundant. (E. S. I.) 



12. corvina, F. S. I. ii. 440. 21 (1781); Gmel.; Fal.; Meig.; 

 Mcq.; Desv. ;' Zett. ludifica, F. ; Pz. ! Fn. cv. 13. Tau, Schr. 

 nigripes, Pz. ! Fn. Ix. 13. Nigra, capite argenteo, thorace cano-to- 

 mentoso quadrivittato, alis subcinereis ; Mas, abdomine testaceo vitta 

 dorsali nigra ; Fcem. abdomine cano nigro-tessellato. Long. 3^ ; alar. 

 7 lin. 



Black. Head silvery-white; frontalia deep black; facialia beset 

 with bristles ; epistoma not prominent. Antennae almost reaching the 

 epistoma ; third joint about four times the length of the second ; sixth 

 plumose to the tip. Thorax with hoary tomentum. Wings slightly 

 grey ; subcostal vein ending at much beyond one-third of the length of 

 the wing ; mediastinal vein ending at a little beyond half the length ; 

 radial vein ending at .about seven-eighths of the length ; prsebrachial 

 vein forming a rounded obtuse angle at its flexure, nearly straight from 

 thence to the tip ; discal transverse vein with two distinct curves, parted 

 by full half its length from the border, and by much less than its length 

 from the flexure of the praebrachial. Halteres pale testaceous. Male. 

 Thorax with four broad black stripes. Alulae greyish. Abdomen testa- 

 ceous ; base and dorsal stripe black. Fern. Thorax with four slender 

 black stripes. Alula3 white. Abdomen hoary, tessellated with black. 



Common. (E.) 



13. vitripennis, Meig. Zw. v. 73. 38 (1826). Nigra, cano- 

 tomentosa, capite subargenteo, frontalibus antice ferrugineis, thorace 

 quadrivittato, alis sublimpidis, abdomine testaceo vitta dorsali apiceque 

 nigris. Long. 3-3| ; alar. 7-8 lin. 



Black, with hoary tomentum. Head somewhat silvery; frontalia 

 ferruginous in front ; facialia bristly to one-third of the length. An- 

 tennas not reaching the epistoma ; third joint about four times the 

 length of the second; sixth plumose to three-fourths of the length. 

 Thorax with four black stripes. Wings nearly limpid ; subcostal vein 



