356 BULLETIN UNITED STATES GEOLOGICAL SUKVEY. [YolY. 



lateral spot, space about ocelli connected on each side with the top of 

 the eye, a stripe extending obliquely backward from the top of the eye 

 and reaching the occiput in the median line of the posterior border of 

 the vertex, and the occiput, all black ; in one specimen the vertex is 

 black with two oblique yellow stripes behind the ocelli, and is bordered 

 on each side posteriorly by the yellow orbital stripes ; tips of mandibles 

 piceous 5 antennae black above, fulvous beneath, the scape yellow beneath. 

 Sutures of the thorax more or less broadly, iDrothorax anteriorly, three 

 broad stripes on the mesothorax connected both anteriorly and poste- 

 riorly, spot on each side of the mesopectus, borders of the scutellum (and 

 in one specimen the scutellum, excepting two yellow spots, and an inter- 

 rui)tion of the band on the postscutellum), a triangular basal spot on the 

 enclosure of the metathorax (extending posteriorly in one specimen along 

 the median line to the base of the abdomen), base of the coxae and the 

 anterior coxae beneath, trochanters more or less, stripe beneath all the 

 femora and the intermediate tibiae, stripe on the four anterior tibiae 

 above and on the femora above but abbreviated on the anterior and 

 posterior j)airs, all black ; anterior tarsi with spatuliform bristles, poste- 

 rior tibiae serrato-spinose. Large spot on anterior face of the first 

 segment of the abdomen produced into a point posteriorly, narrow basal 

 margins of the segments more or less produced into a tooth on the disk, 

 small spot on each side of the second ventral segment, and in one speci- 

 men a spot on each side of the basal dorsal segment i)osteriorly, black ; 

 narrow ai)ical borders of the abdominal segments depressed and j)ol- 

 ished, segments slightly constricted ; the basal segment little narrower 

 than the succeeding ones, transverse, subtruncate anteriorly. Wings 

 subhyaline, nervures and stigma testaceous ; submedial cell of the pos- 

 terior wings extending slightly beyond the medial cell on the externo- 

 medial nervure. 



In the form of the basal segment of the abdomen and in the punctur- 

 ing of the abdomen this species resembles P. ventilahris Fabr., but in the 

 sculpture of the thorax it resembles P. flavifrons Cress.; in coloration it 

 is very distinct from any other species. 



21. EuCEECEEis suPEEBus Cress., (? . 



In this specimen the spot above and between the antennae is connected 

 with the yellow face below, and the second ventral segment is mostly 

 yellow ; the coxje are black above, and the tubercles are black with fer- 

 ruginous borders ; a spot on the i^ostscutellum, the apical margins of 

 thfe first, second, third, and sixth segments of the abdomen, and the 

 entire seventh segment are ferruginous ; the third and fourth ventral 

 segments and the apical border of the fifth and sixth ventral segments 

 are fulvous. The clypeus is three-toothed at the apex, the median tooth 

 the longest ; the lateral lobes of the clypeus are distinctly separated 

 from the eyes ; there is a triangular smooth spot above the intermediate 

 coxae; the third, fourth, and fifth ventral segments have a subapical 



