300 



SECTION 17. 



Mediastinal vein ending at very much before two-thirds of the length 

 of the wing ; subcostal ending at about four-fifths of the length ; radial 

 and cubital springing from a common petiole, which proceeds from 

 the subcostal at about half the length of the wing, and which they 

 much exceed in length ; radial forked at half its length ; its fore fork 

 very short ; cubital joined very near its base with the third externo- 

 medial, by a transverse veinlet, whose extremely obtuse angle near its 

 hind end emits the first externo-medial ; the latter is connected with 

 the third externo-medial by a veinlet, whose middle, which is hardly 

 angular, emits the second externo-medial ; subanal connected with the 

 third externo-medial by an oblique veinlet which is opposite one-fourth 

 of the length of the discal areolet. 



44. tenella, Meig. Zw. i. 146. 54 (1818) ; Mcq. ; Gimm. Cana, 

 palpis antennisque nigris, thorace antico pectore et metathorace albidis, 

 alis vix subcinereis, venis stigmateque pallidis, halteribus albidis apice 

 fuscescentibus, abdomine fuscescente, pedibus testaceis, tarsis fuscis. 

 Long. 3 1 ; alar. 8 lin. 



Hoary. Palpi and antennas black ; front of the thorax, pectus, and 

 metathorax whitish. Wings very slightly greyish ; veins and stigma 

 pale. Halteres whitish, with pale brownish tips. Abdomen brownish. 

 Legs testaceous ; tarsi brown. 



Not common. (E.) 



e e. No veinlet between the radial vein and the costa. 



SECTION 18. 



Mediastinal vein ending in a transverse veinlet at a little beyond 

 two-thirds of the length of the wing ; subcostal curved abruptly to the 

 hind border at rather beyond five-sixths of the length ; radial and 

 cubital much longer than their common petiole, which proceeds from 

 the subcostal at some space before two-thirds of the length of the wing ; 

 first externo-medial proceeding from the cubital at a little before one- 

 third of its length, angular near its base, joined to the third externo- 

 medial by two veinlets ; second externo-medial springing from the mid- 

 dle of the outer veinlet ; subanal connected to the third externo-medial 

 by an oblique veinlet, which is nearer than the inner of the two before 

 mentioned to the base of the wing. 



45. turpis, n. Nigro-fusca, nitens, palpis autennisque nigris, 

 thorace vittis duabus fulvis, pectore ferrugineo, alis subcinereis, abdo- 

 mine fusco, pedibus testaceis, femoribus tibiisque apice tarsisque fuscis. 

 Long. 3J-4 ; alar. 7-7! lin. 



Blackish-brown, shining. Palpi and antennas black. Thorax with 

 a short tawny stripe on each side in front. Pectus ferruginous, i 

 ceous by the base of each wing. Wings greyish ; stigma brown ; veins 



