TACHINA. 75 



ovato, basi marginibus posticis vittaque dorsali nigris. Long. 2f ; 

 alar. 3 lin. 



Frontalia deep black ; bristles of the front descending beyond one- 

 third of the face ; facialia bristly for one-fourth of the length ; epistoma 

 not prominent. Antennae reaching the epistoma; third joint linear, 

 rounded at the tip, almost twice the length of the second ; sixth indis- 

 tinctly pubescent, tapering gradually from the base to the tip, more 

 than twice the length of the third ; costal vein ending where the prae- 

 brachial meets it, a little in front of the tip of the wing ; subcostal vein 

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

 little before half of the length ; radial vein ending at beyond four-fifths 

 of the length ; cubital vein ending at very near the tip of the costal ; 

 pra3brachial vein forming an obtuse angle at its flexure, from whence 

 to its tip it is hardly curved inward ; discal transverse vein with two 

 rather deep curves, parted from the border by little more than half its 

 length, and by three-fourths of its length from the flexure of the prae- 

 brachial. 



Not rare. (E.) 



128. comosa, n. Nigra, cano-subtomentosa, capite albo, anten- 

 narum articulo sexto ad Us trientem incrassato, alis cinereis basi et ad 

 costam obscurioribus, alulis albis, abdomine obconico tessellato valde 

 setoso. Long. 2-2^ ; alar. 4-5 lin. 



Frontalia black, widening in front ; bristles of the front descending 

 to two-thirds of the face ; face very slightly oblique ; epistoma not 

 prominent. Antennae not reaching the epistoma ; third joint linear, 

 rather broad, almost truncated at the tip, more than twice the length 

 of the second ; fifth long; sixth stout for two-thirds of the length, much 

 longer than the third. Costal vein ending at very little in front of the 

 tip of the wing ; subcostal vein ending at a little beyond one-third of 

 the length ; mediastinal vein ending at a little before half of the length ; 

 radial vein ending at about five-sixths of the length ; cubital vein join- 

 ing the costal close to its tip ; prsebrachial vein forming a slightly ob- 

 tuse and not sharply defined angle at its flexure, near which it is much 

 curved inward, and is thence straight to its tip ; discal transverse vein 

 curved inward in the middle, parted from the border and from the 

 flexure of the prsebrachial by much more than its length. 



Bare. (E.) 



129. constans, n. Nigra, cano-tomentosa, capite albo, thoroce 

 nigro-quadrivittato, scutello ferrugineo, alis subcinereis, alulis albis, ab- 

 domine obconico subtessellato. Long. 3 ; alar. 6 lin. 



Frontalia piceous, broad ; bristles of the front descending to nearly 

 half the length of the face ; epistoma not prominent ; lateralia red ; 

 palpi long, slender. Antennae not reaching the epistoma ; third joint 

 linear, almost truncated at the tip, much more than twice the length of 

 the second ; sixth very minutely pubescent, stout for much more than 



