TACH1NA. 49 



Costal vein ending on the fore border at some distance from the tip of 

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

 length ; inediastinal vein ending at before hah of the length ; radial 

 vein ending at before four-fifths of the length ; cubital vein joining the 

 costal near its tip ; prsebrachial vein forming a hardly obtuse angle at 

 its flexure, between which it is indistinctly curved inward ; discal trans- 

 verse vein with two slight curves, parted from the hind border by a 

 little more than its own length, and by half its length from the flexure 

 of the prabrachial. 

 Bare. (E.) 



68. emissa, n. Nigra, cano-tomentosa, capite albo, fronte pallide 

 cervina, palpis fulvis, antennarnm articulo sexto nudo, thorace nigro- 

 quadrivittato, scutello nigro, alis einereis, vena pratbrachiali angulum 

 rectum Jingente, alulis albis, abdomine longi-obconico, segmentorum 

 marginibus posticis vittaque dorsali nigris. Long. 3% ; alar. 6 lin. 



Frontalia deep black, widening in front; bristles of the front de- 

 scending to full half the length of the face; face vertical; facialia 

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

 nearly reaching the epistoma ; second joint thrice longer than deep ; 

 third linear, truncated, much longer than the second ; fourth very short ; 

 fifth moderately long ; sixth bare, stout to full half the length, about 

 twice the length of the third. Costal vein with a spine at the tip of 

 the subcostal, ending at far in front of the tip of the wing ; subcostal 

 vein ending at one-third of the fore border ; mediastinal vein ending at 

 a little before half of the border ; radial vein ending at three-fourths of 

 the border ; cubital vein ending very near the tip of the costal ; pra- 

 bracJiial vein forming a right angle at the flexure, which emits a long 

 branch, much curved inward near this, and thence straight to the tip; 

 discal transverse vein with two indistinct curves, parted by much less 

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

 than its length from the border. 



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



69. ruricola? Meig. Zw. iv. 299. 104 (1824). Nigra, cano- 

 tomentosa, capite albo, aniemmrum articulo sexto mido, thorace nigro- 

 quadrivittato, scutello nigro, alis subcinereis, vena prcebrachiali angulum 

 obtusum Jingente, alulis einereis, abdomine obconico, basi apice et seg- 

 mentorum marginibus posticis nigris nitentibus. Long. 8^ ; alar. 7 lin. 



Frontalia linear ; bristles of the front descending to half the length 

 of the face ; face vertical ; epistoma not prominent ; palpi tawny. 

 Antennae reaching the epistoma ; second joint more than twice longer 

 than deep, testaceous at the tip ; third slightly deepening from the base 

 to the tip, which is rounded, much longer than the second ; fourth very 

 short ; fifth short ; sixth bare, stout for half the length, very much 

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

 the wing ; subcostal vein ending at one-third of the length ; mediastinal 



VOL. II. H 



