I 



North American Hymenojftera. 369 



with an obscure golden margin^ terminating in a spot : 

 metathorax Avith a golden spine each side^ in a golden 

 spot: wings dusky: iergum on the posterior edges re- 

 fleeting whitish ; at base of the first segment, obscure 

 golden sericeous ; posterior margins of the first, second 

 and third segments, each with a yellow hand widely inter- 

 rupted in the middle, the anterior one largest : feet honey- 

 yellow : thighs black at base. 

 Length three tenths of an inch- 

 Readily distinguishable from N. 5-5pzno5W5, Nob. ' Re- 

 sembles N. interruptusj F. but the areolae of the raeta- 

 thoracic spines are not gilded in that species. 



''k 



PsEN, Latr. 



1. P. meUipes. ? Black, with a silvery reflection j 



antennae at base, tibiae and tarsi piceous. 



Inhab. Indiana. 

 ■ Body black: head beneath the antennae yellowish- 

 silvery : occiput with a silvery reflection : antenncB to the 

 seventh joint honey-yellow : mandible piceous : thorax 

 with longitudinally confluent punctures, a slender trans- 

 verse line before, four or six obsolete spots near the scutel 



pet 



nervures 



brown ; second cubital cellule receiving both recurrent 



nervures 



the tip; petiole as long as. the posterior tarsi or rather 

 longer, arcuated, piceous : tibia and tarsi piceous or 

 honey-yellow; anterior pair with dense, short, golden 

 hair. 



Length nearly eleven twentieths of an inch. 



Very similar in form and color to P. atrdtum^ Fabr^ 



VOL. I. PART IV. 48 



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