144 BIBIONIDJC. 



10. soluta, Loew, Linn. Ent. i. 335. 8 (1846). Nigra, alls lim- 

 pidis, venis albis apud costam testaceis, vena radiali a costa remota, sub- 

 apicalis ramo antico basi intvrrupto. Long. 1 ; alar. 2 lin. 



Blnck. Wings limpid ; costal, subcostal, and radial veins testaceous, 

 the rest white ; subcostal ending at a little beyond one-third of the length 

 of the wing ; radial rather far from the border, ending at some distance 

 beyond half the length. 



Common. (E. I.) 



11. simplex, n. Nigra, alis subcinereis, venis albidis apud costam 

 nigris. Long. 1^ ; alar. 1| lin. 



Black, lyings slightly grey ; costal, subcostal, and radial veins black, 

 the other veins whitish ; subcostal vein ending at about one-third of tlte 

 length of the wing ; radial ending with the costal at some distance be- 

 vond half the length. 



Rare. (E.) 



12. albitarsis, Zett. Dipt. Scand. ix. 3408. 14 (1850). Nigra, 

 elongata, alis albis, venis albis apud costam testaceis, tarsis albis. Long. 

 1| ; alar. 2 lin. 



Black. Body rather long. Wings white; costal, subcostal, and 

 radial veins testaceous, the rest white; subcostal vein ending at a little 

 before half the length of the wing ; radial ending at a little beyond half 

 the length. Tarsi white. 



Common. (E. I.) 



13. halterata, Meig. Zw. vii. 55. 16 (1838); Loew. Nigra, alis 

 limpidis, venis albis apud costam nigricantibus. Long. -|; alar. 1^ lin. 



Black. Wings limpid ; costal, subcostal and radial veins blackish, 

 the other veins white ; subcostal ending at a little beyond one-fourth of 

 the length of the wing ; radial ending with the costal at half the length. 



Rare. (E.) 



14. brevicornis, Meig. Zw. vi. 314. 11 (1830); Loew; Zett. 

 septemnodia, Sclir. Nigra, antennis brevissimis, alis albis, venis albis 

 apud costam uigricantibus. Long. \ f; alar. | f lin. 



Black. Antennae very short. Wings white ; costal, subcostal, and 

 radial veins blackish, the rest white ; subcostal ending at about one- 

 fourth of the length of the wing; radial ending with the costal at one- 

 third of the length. 



Common. "(E. S. I.) 



Genus IV. ASPISTES. 



ASPISTES, Hoffm.; Meig. Zw. i. 319 (1818); Mcq. ; Zell.; Loew ; 

 Zett. 



Corpus niinutum, oblongo-ovatum, glabrindum, iiitidum. Caput ro- 



