356 HYMENOPTERA ACULEATA. 



the ^ with the third and fifth joints subequal, the fourth a 

 little more than half the length of the fifth ; abdomen closely 

 punctured in both sexes; sixth segment in the 5 dull, very 

 closely punctured and clothed with exceedingly short red 

 pubescence, beneath punctured, lacinia of S armature with 

 its inner margin widely emarginate and produced basally 

 into a sharp angle, sagittte hamate beneath near the centre 

 and slightly so at the apex, sixth ventral segment in tlie ? 

 with its posterior margin reflexed, the reflexion angularly 

 produced on each side ; tibiffi and tarsi in the S clothed with 

 red hairs, in the $ with black, those at the apex of the meta- 

 tarsi and the other tarsal joints in this sex alone reddish. 



L. 16-22 mm. 



Associates with Bow &MS ZapifianMs, and like that species 

 widely distributed throughout the kingdom, though far less 

 common than its host. 



P. vestalis, Fourc — Black ; head and thorax densely 

 clothed with black hairs, a broad band in front of the latter 

 in both sexes, and a few hairs on the vertex of the former 

 in the (^, yellow, antenna; with the fourth joint in the cJ 

 shorter than the third, fifth almost as long as the third 

 and fourth together ; wings smoky in both sexes ; abdomen 

 punctured, the posterior margins of the segments shining 

 and smooth in the (J, the first and second segments clothed 

 with black hairs, the first in the ^J often with yellow hairs 

 intermixed, or sometimes entirely yellow, third with black 

 hairs at the base, with lemon-yellow at the apex, the fourth 

 and fifth with white, sixth in the ^J with white and black 

 intermixed, seventh with black, sixth in the ? shining, 

 narrowly grooved towards the apex, which, as well as the 

 sides, is clothed with short velvety fulvous pubescence, 

 segments beneath largely punctured, sixth simple in the 

 cJ,not tuberculate, lacinia of the armature shortly trian- 

 gular, sagittee not hamate in the centre beneath, but with 

 their apices angularly dilated laterally, sixth segment in 

 the $ with a longitudinal callosity on each side, subparallel 



