.-J- 



370 



/ 



which, however, has the second and third cellules each 

 receiving a recurrent nervure, and the petiole is propor- 

 tionally rather shorter.. 



Black ; hypostoma silvery ; tarsi 



2. P. leucopu 



white. 



Inhab. Indiana. 



9 Body black, with a slight silvery reflection : anten- 

 na immaculate : hypostoma entirely silvery : thorax with 

 minute, longitudinal lines on the disk : wings hyaline : 

 nervures blackish ; second cubital cellule receiving the 

 two recurrent nervures : tergum Impunctured, polished ; 



than 



tarsus : tarsi white, dusky towards the tip. 

 Length over three tenths of an inch. 

 S Lines of the thorax only visible at base and 



an 



J t 



Lyrops, lUig. 



1. L. 



t Stcmmata one. 



argenidta, Beauv. Black 



igments 



margined with dark glaucous ; raetathorax with a few 

 wrinkles on the posterior lateral margin. 



Inhab. United States. 



9 Body black : collar having a gradually elevated 

 angle on^ the middle ; wings slightly dusky ; a darker 



band 



varymg to purplish, and at tip, in the darker portion, tinged 

 with green ; recurrent nervures entering the second cubital 



!! . l.-l? "'"''" ^"^ ^^""^^ °^^^''' ^"^ ^^"^^ '"o^^ tl^^'^ t^^'' 



ff^ftathorax, posterior lateral edge 



own width 



apart 



transversely 



