North American Hymcnoptera. 249 



Length nearly three fifths of an Inch. 



$ Orbits white uninterrupted : thorax more vari) 



scute 



with a black disk, the white margin extending forwards 

 in the form of a V: metathorax black varied with white, 

 spines prominent : tergum, first joint on the lateral mar- 

 gin white as well as the tip; second segment with a 

 much arcuated line each side of the middle, curvinor for- 

 wards; remaining segments with the posterior margins 

 dull whitish: venter blackish, somewhat banded: pleura 

 whitish, with a black line under the wings ; anterior por- 

 tion black with white lines : pectus pale honey-yellow : 

 coxce, posterior pair with a black line. 



Length nine twentieths of an inch. 



This is a very prettily variegated species. 



^. A. melleus. Honey-yellow ; antennae white, black- 

 ish at base. 



Inhabits Indiana. 



<? Body honey-yellow : head with a large black spot 

 above the antennae ; beneath the antennae yellowish : an- 

 tenncB white ; basal third above black : occiput with a 

 dusky spot: scutel yellow, the sutures around It black : 

 wings with a blackish tip: tergum, sutures somewhat 

 dusky : tibi<B and trochanters yellowish. 



Length two fifths of an inch. 



Bassus, Fabr. 



1. B. sanctus. Black; metathorax, abdomen and 

 posterior feet sanguineous. 

 : Inhabits Indiana. 



$ Body black : palpi tinged with piceous : thorax, 

 pleura, pectus, and two anterior pairs of feet inunaculate : 



VOL. I. PART III. 33 



