90 



junction with the cubital ; discal transverse vein with a deep hinder 

 inward curve, parted by much less than its length from the flexure of 

 the prsebrachial and from the border. Halteres, abdomen and legs 

 testaceous. Abdomen long-obconical, with an irregular black stripe. 

 Tarsi black. 



Not rare. (E.) Meigen and Zetterstedt describe D. cristata 

 as having brown antennae, the abdomen with brown spots, not 

 testaceous, and the femora black. 



3. volvulus, F. E. S. iv. 328. 67 (1792); Fal.; Meig.; Mcq.j 

 Zett. cylindrica, Fal. Nigra, albo-tomentosa, capite antice argenteo, 

 frontalibus atris, palpis fulvis, alis subcinereis basi albidis. Long. 4 ; 

 alar. 7 lin. 



Black, with white tomentum on the thorax and on the fore-borders 

 of the abdominal segments. Head silvery in front, clothed beneath 

 with white hairs. Frontalia deep black, widening in front; facialia 

 without bristles ; epistoma not prominent. Eyes bare. Palpi tawny. 

 Antenna3 almost reaching the epistoma ; third joint slightly rounded at 

 the tip, more than four times the length of the second ; sixth plumose 

 with short hairs, stout at the base, about twice the length of the third. 

 Wings greyish, whitish at the base ; costal vein ending at hardly in 

 front of the tip of the wing ; subcostal vein ending much before one- 

 third of the length of the wing ; mediastinal vein ending much before 

 half the length ; radial vein ending before seven-tenths of the length ; 

 cubital vein ending at a little in front of the tip ; prasbrachial 

 vein forming a very obtuse angle at its flexure, beyond this it is indis- 

 tinctly curved inward ; discal transverse vein very slightly undulating, 

 parted from the border by much more than half its length, and by a 

 little less than its length from the flexure of the prsebrachial. Alula3 

 whitish. Abdomen fusiform. 



Not rare. (E.) 



4. nigripes,F.E.S.iv.319.30(1792); Panz.! Fn.civ.18.; Meig.; 

 Mcq. lateralis, Fal. (mas). leucozona, Panz. Fn. civ. 19; Meig.; 

 Mcq. ; Zett. nigrina, Fal. (fcem.) Nigra, cano-tomentosa, capite ar- 

 genteo, frontalibua atris, palpis fulvis, thorace quadrivittato, alis cine- 

 reis ; Mas, lateralibus scutellique apice ferrugineis, abdomine obconico 

 lateribus testaceis ; Fcem. abdomine subfusiformi albo-quadrimaculato. 

 Long. 4-5^; alar. 8-12 lin. 



Black, with hoary tomentum. Head with silvery tomentum. Fron- 

 talia deep black ; facialia bristly for about one-fourth of the length ; 

 epistoma hardly prominent. Eyes bare. Palpi tawny. Antenna 

 nearly reaching the epistoma. Thorax with four very slender stripes. 

 Wings grey ; 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 a little beyond hah 7 the length ; radial vein 

 ending at a little beyond five-sixths of the length ; cubital vein joining 



