OP PHILADELPHIA. 851 



LEIA Meig, 



L. BIVITTATA. — Honey-yellow ; trunk bilineate, and tergum 

 with two series of black punctures. 



Inhabits Indiana. 



Body rather pale honey-yellow : antennae black at tip : stem- 

 mata very distinct, in a curved line : thorax a little hairy, on each 

 side a dilated black vitta : wings fasciate near the tip : tergum on 

 each side with a series of oval black spots : coxae white. 



Length over three-twentieths of an inch. 



Taken on the window in June. [1531 



MYCETOPHILA Meig. 



M. i»iscoid[e]a. — Thorax pale with a blackish disk ; wings with 

 a fuscous spot. 

 1^ Inhabits Indiana. 



Head blackish : antennae whitish, at tip blackish : thorax pale 

 honey-yellow; disk blackish owing to three vittae of that color 

 being confluent into one : wings hyaline, with a fuscous spot on 

 the connecting nervures : tergum blackish, somewhat sericeous ; 

 poisers whitish : feet whitish, with blackish tarsi : abdomen whit- 

 ish at base. 



Length more than one-tenth of an inch. 



Belongs to Meigen's first division of the genus. 



M. nubila. — Dusky; wings immaculate; feet whitish. 



Inhabits Indiana. 



Body dusky, brownish : antennae first and second joints yel- 

 lowish : thorax on the humerus dull honey-yellow : scutel dull 

 yellowish : wings hyaline, immaculate : poisers whitish, capitulum 

 dusky before the tip : abdomen slender, gradually enlarging to 

 the tip : tergum with the tips of the segments pale ; anal seg- 

 ment pale : feet whitish, dusky towards the tips ; spines one-third 

 the length of the first tarsal joint. 



Length three-twentieths of an inch. 



Belongs to Meigen's fifth division. 



SCIARA Meig. 



L. unicolor. — Velvet black ; wings with a slight violaceous 

 tinge. ^ [154] 



Inhabits Mexico. 

 1829.] 



