218 MUSCID^E. 



alls sublimpidis, pedibus fulvis ; Mas, abdomine thorace non duplo lon- 

 giore; Fcem. abdomine thorace plus duplo longiore. Long. 2^-3; alar. 5 lin. 



Black, shining. Antennae ferruginous at the base ; arista testaceous. 

 Thorax red ; disc in front black, whence a Hack stripe extends nearly to 

 the scutellum. Wings nearly limpid. Halteres pale yellow. Legs 

 tawny ; tarsi darker. Male. Abdomen less than twice the length of the 

 thorax. Jem. Abdomen a little more than twice the length of the thorax. 



Not rare. (E.) 



L. elongata, Meig., has been recorded as a British species. 



Genus III. LISSA. 



LISSA, Meig. Zw. v. 370 (1826) ; Mcq. ; Zett. Ocyptera p., F. Chy- 

 liza p., Fal. 



Corpus cylindricum, sublineare, longissimum, gracillimum. Caput trans- 

 versum, subquadratum. Antenna breves ; articulus tertius secundo 

 paullo longior. Alas parva3. Pedes sat breves ; femora postica crassa, 

 subtus spinosa. 



Body cylindrical, nearly linear, very long and slender. Head subqua- 

 drate, transverse. Front concave. Face vertical. Epistoma and peri- 

 stoma not prominent. Antennce shorty not near reaching the epistoma ; 

 third joint conical, a little longer than the second ; sixth setiform, long, 

 slender, pubescent. Thorax elongate-quadrate. Wings small; costal 

 vein ending on the hind border very near the tip of the wing ; subcos- 

 tal ending at a little beyond one-third of the length ; mediastinal end- 

 ing at a little before half the length ; radial ending at a little before 

 five-sixths of the length ; cubital and prsebrachial very slightly diverg- 

 ing between the transverse veins, and more slightly converging from 

 the discal transverse to the border ; discal transverse straight, upright, 

 parted by more than twice its length from the pra3brachial transverse, 

 and by full half its length from the border. Abdomen linear, narrower 

 than the thorax, and more than twice its length. Legs rather short, 

 pubescent, without bristles. Hind femora thick, armed with spines 

 beneath. 



1. dolium, F. S. A. 315. 12 (1805). loxocerina, Fal.; Meig.; 

 Mcq. ; Zett. Nigra, antennis fulvis, articulo sexto albido, alis limpidis, 

 pedibus fulvis, femoribus anticis apice tibiisque anticis fuscis, tarsis 

 anticis nigris. Long. 4 ; alar. 5 lin. 



Black, shining. Head and thorax beneath, and sutures of the ab- 

 domen with white tomentum. Antennae tawny ; sixth joint whitish. 

 Wings limpid. Halteres pale yellow. Legs tawny; fore tibiae and 

 tips of fore femora brown ; fore tarsi black. 



Not common. (E.) 



