26 MUSCID.E. 



oblique ; facialia bristly to one-third of the length. Antennae not reach- 

 ing the epistoma ; first and second joints tawny ; second about twice 

 longer than deep ; third slender, linear, rounded at the tip, longer than 

 the second ; fourth and fifth very short ; sixth tawny towards the base, 

 stout for one-third of the length from the base, more than twice the 

 length of the third. Costal vein ending at some distance in front of 

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

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

 radial vein ending at a little before four-fifths of the length ; cubital 

 vein joining the costal near its tip ; prsebrachial vein forming a right 

 angle at its flexure, near which it is slightly curved inward, and is 

 thence straight to its tip ; discal transverse vein with two curves, which 

 are very slight, distant rather more than half its own length from the 

 border, and rather less than half from the flexure of the prsebrachial 

 vein. 



Eare. In Mr. Desvignes's collection. (E.) 



16. viridis, Fal. Msc. 25. 51 (1810) ; Meig. ; Mcq. ; Zett. Aureo- 

 viridis, cyaneo varia, capite argenteo, antennis pedibusque nigris, alis 

 subcinereis, alulis albis. Long. 5 ; alar. 10 lin. 



Bright golden-green, more or less bluish-green beneath ; bristles of the 

 front not descending along the face ; frontalia piceous ; mediana dark 

 red ; epistoma not prominent. Antennas not reaching the epistoma ; 

 third joint indistinctly concave above, almost linear, rounded at the 

 tip, longer than the second ; costal vein ending a little above the tip 

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

 length ; mediastinal vein ending at very little beyond half the length ; 

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

 ing the costal vein very near its tip ; praebrachial vein with a branch 

 at its flexure, which forms a very slightly oblique angle, thence after a 

 very gentle inward curve it continues almost straight to its tip ; discal 

 transverse vein parted from the border by much more than half its own 

 length, and by much more than half its length from the flexure of the 

 prasbrachial. 



Not rare in woods during the spring. (E. S.) 



17. flavescens? Meig. Zw. iv. 294. %%,fasciata, Fal. Nigra, 

 cano-tomentosa, capite albo, palpis fulvis, thorace nigro-quadrivittato, 

 alis subcinereis, alulis albis. Long. 4^- ; alar. 8 lin. 



Front yellowish ; frontalia deep black, widening in front ; bristles of 

 the front descending to three-fourths of the face ; face vertical ; facialia 

 bristly to one-fourth of the length; epistoma not prominent; palpi 

 tawny. Antennas not reaching the epistoma ; second joint full twice 

 longer than deep ; third sublinear, obliquely truncated at the tip, much 

 longer than the second; fourth very short; fifth rather long; sixth 

 bare, stout for more than one-third of the length, very much longer 

 than the third. Costal vein ending at far in front of the tip of the 



