36 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



scape rather slender, reaching to the lateral ocelli, not much narrowed 

 proximally and but slightly curved ; pedicel slightly longer than wide, 

 nuch narrowed proximally; third joint very short and so closely 

 joined to the fourth as to make them both look like one joint; fourth 

 joint about as wide as long, greatly swollen, about as thick as the 

 scape and as long as the pedicel; fifth joint as long as wide, as wide 

 as the pedicel; "club 6-jointed, all the joints, except the last, trans- 

 verse, the last conical, a little more than twice the length of the 

 penultimate"; thorax across the tegulae as wide as the head, one 

 and one-half times as long as wide; notauli complete, m.eeting in an 

 acute point posteriorly, the latter projecting but slightly over the 

 scutellar fovea; median lobe of mesonotum (except posteriorly where 

 it is indistinctly longitudinally striate) shagreened; lateral lobes 

 inwardly toward the front and medially behind, shagreened, other- 

 wise unsculptured ; scutellum convex, shagreened, a little wider than 

 long, sloping posteriorly, margined at the sides; abdomen as long as 

 the thorax, triangular from its base to the apex of the second tergite, 

 as wide as the thorax; first tergite twice as wide as long, the sides 

 oblique; dorso-lateral carinae not very prominent, not pubescent; 

 second tergite a little longer than wide at the apex, twice as wide at 

 the apex as at base, the sides slightly curved; basal foveae well 

 marked, not pubescent, striate on their inner slopes, the striae few 

 and not extending beyond basal third of the segment; tergites beyond 

 the second short and narrowing abruptly to the apex, united about 

 one-third as long as the second ; wings "extending about the length 

 of the abdomen past its apex, hyaline, broad apically, the pubescence 

 inconspicuous. Black, legs dark brown to piceous; antennae the 

 same color as the front legs, brownish-yellow. 



Type locality. — Washington, District of Columbia. 



Type.— C&t. No. 24598, U.S.N.M. 



Redescribed from the type specimen in the United States National 

 Museum, The antennal joints beyond the fifth are missing from the 

 type. 



7. PL AT YG ASTER RUFIPES (Ashmead). 



Synopeas rufipes Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 287, pi. 12, fig. 5, 

 Female. 



Female. — Length 1 .5 mm. Head seen from above a little over twice 

 as wide as long, somewhat excavated posteriorly, seen from in front 

 broadly elliptical, a little more than the width of the eye wider than 

 high; occiput and vertex strongly striate, the latter rather acute; 

 cheeks strongly shagreened, roughened; ocellar space stud frons above 

 and on the sides more finely shagreened than the cheeks, more finely 

 yet in the center of the face where wavy aciculations are discernible ; 

 frons just above insertion of antennae rather finely transversely striate; 



