PKOSENA, 93 



SUBFAMILY 3. DEXIDES. 



Stomoxyda p., Meig. Dexiar'ue p., Mcq. ; Meig. Stomoxydea p., Westw. 

 Tachinaria p., Westw. 



Arista pubescens, aut plumosa. Thorax brevis. Alula magna. Pedes 



longi. 

 Arista pubescent, or plumose. Thorax short. Alula large. Legs 



long. 



The Decides might cease to be considered as a subfamily, for 

 part of the species therein seem to belong to the Tachinides, and 

 the rest to the Muscides. 



a. Proboscis long, geniculate at the base. PROSENA. 

 a a. Proboscis short. DEXIA. 



Genus I. PROSENA. 



PROSENA, St. Farg. et Ser. Enc. Meth. (1830). Westw.; Mcq.; 

 Meig. Zw. vii. Stomoxys p., F. ; Gmel. ; Latr. ; Pz. 



Corpus magnum, subcylindricum, pubescens, setosum, opacum. Oculi 

 mediocres, oblongi, in utroque sexu remoti. Proboscis longa, por- 

 recta, basi geniculata. Palpi parvi, breves, clavati, pilosuli. 

 Body large, nearly cylindrical, pubescent, bristly, dull. Eyes of 

 moderate size, oblong, remote in both sexes. Proboscis long, porrect, 

 geniculated at the base. Palpi small, short, clavate, somewhat pilose. 



1. siberita, F. S. I. ii. 467. 3 (1781) ; Gmel. ; Fal. ; Latr. ; Meig. 

 grisea, F. longipes, Gmel. irritans, Pz. ! Fn. v. 24. Nigra, ci- 

 nereo-tomentosa, capite testaceo albo-tomentoso, frontalibus luteis, an- 

 tennis pedibusque testaceis, alis subcinereis, tarsis nigris; Mas, ab- 

 dominis lateribus testaceis. Long. 4^ ; alar. 9 lin. 



Black. Head testaceous, with shining white tomentum; frontalia 

 pale luteous, widening in front, with bristles along each side ; facialia 

 bristly along the whole length; epistoma slightly prominent. Pro- 

 boscis black, testaceous towards the base. Palpi testaceous. An- 

 tennae testaceous, not nearly reaching the epistoma ; third joint linear, 

 rounded at the tip, about thrice the length of the second ; sixth plu- 

 mose, with long hairs, very much longer than the third. Thorax with 

 four very slender interrupted black stripes. Wings pale grey ; veins 

 testaceous; costal vein ending at a little in front of the tip of the 

 wing, with a spine by the tip of the subcostal ; subcostal vein ending 

 at a little beyond one-third of the length; mediastinal vein ending 

 at rather beyond half the length ; radial vein ending at about four-fifths 



