304 Say^s Descriptions of 



w 



Inhabits Mexico, 



^ Body black, slightly sericeous : wings dark purplish ; 

 second and third cubital cellules a little narrowed at the 

 radial cellule, particularly the latter, which is less than 

 two thirds the length of the second cellule, in that part ; 

 basal series of transverse nervures not dislocated : meta- 

 thorax with a very shght reflection of purplish, and with- 

 out any impressed line ; the posterior edge obviously 

 reflected : tergum with a distinct purplish reflection : 

 beneath black ; in a favorable light a very slight purplish 

 reflection may be perceived on the thighs. 

 . Lenfjth two fifths of an inch. 



5. P. 5'notaius. Tergum on the second segment 



with two white spots ; third segment with a white inter- 

 rupted band. 



Inhabits Indiana. 



<^Body black: head with a slight white reflection 

 before ; and a very slender white line on the posterior 

 orbit : tvings on the apicial margin black ; basal series of 

 transverse nervures not dislocated : tergum with a white 

 dot each side before the middle, on the second segment ; 

 third segment with a white, interrupted band at base ; on 

 the fourth segment at base, is an obsolete, whitish spot 

 each side, sometimes w^anting ; anal segment with a white 

 spot at base. 



Length two fifths of an inch. 

 Resembles higuttdtus, Fabr 



stmgui 

 tersrum. 



ell 



as by the white spot on the anal seo-ment. 



7- P. mellipes. Black ; feet yellowish rufous. 



Inhabits Indiana. 



9 Body black, somewhat sericeous with silvery hairs : 

 antenn<E, joints long, distinct : mandibles piceous at tip : 



