164 WESTERN QUARTERLY REPORTER. 



pair smaller ; posterior segments and tips of the first segment 

 with yellowish sericeous hair. 

 Length more than half an inch. 



SCOLIA Latreille, Jurine, 



1. S. 8-mactjlata. [Ante, p. 68.] 



2. S. tricincta. [Ante, p. 69.] 



3. S. confluenta. [Ante, p. 68.] 



PLESIA Jurine. [75] 



P. marginata. — Yellow ; abdominal segments margined be- 

 hind with black ; beneath black. 



Body yellow ; head black, varied with yellow ; collar with the 

 anterior declivity black ; thorax black ; squammula and large cen- 

 tral spots yellow ; two spots on the scutel yellow ; metathorax and 

 a large spot on the pleura pale rufous ; feet black : a whitish 

 spot near the tip of the posterior face of the tibia, and another 

 upon the anterior face of the anterior pair; tergum with the pos- 

 terior margin of the segments black ; anal segments black : ven- 

 ter with three triangular yellow spots on each side. 



Length less than three-fifths of an inch. 



This species agrees in character with the genus Plesia of Jurine; 

 but it differs from Mizine of Latreille, by having the mandibles 

 entirely destitute of teeth, a character which it possesses in com- 

 mon with Meria Illiger, but the form of its wing cells will not 

 admit of its being referred to the latter genus. 



SAPYGA Latreille, Jurine. 



S. subulata. — Black, elongated ; thorax spotted, and abdom- 

 inal segments margined with yellow ; feet yellow. 



Inhabits the United States. 



Body elongated, black, apparently glabrous but covered with 

 short hair ; clypeus and base of the mandibles, yellow ; mandibles 

 with a single tooth near the tip ; antennae rather longer than the 

 thorax, cylindrical, attenuated at base ; thorax bifasciated before 

 the wings, the anterior band interrupted ; a spot on [76] the disk 

 and two transverse scutellar spots yellow ; metathorax with two lon- 

 gitudinal yellow spots ; a yellow triangular spot under the origin 



