526 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.53. 



Male. — Length 8 mm., antennae 5.5 mm. Eyes one and one-half 

 times as long as width of face; malar space practically obsolete; foveo- 

 ocular line less than half as long as interfoveal; lateral ocelli greater 

 in diameter than postocellar line, nearly touching the eyes. Propo- 

 deum barely reaching middle of coxae, more weakly sculptured, tho 

 rugulosity confined to apical areas; tarsal joints beyond first relatively 

 longer, the basitarsus being barely as long as next three joints; 

 nervulus antefurcal (obliterated below in both wings). First torgito 

 distinctly shorter than propodeum and than second tergite, the two 

 combined not longer than remaining tergitcs united. Lacks almost 

 entirely infuscation of thorax, and occiput is rufous instead of black. 



Type-locality. — Rosslyn, Virginia. 



Type.— Cat. No. 20261, U.S.N.M. 



Described from one female and one male collected at type locality 

 by H. H. Smith. 



CKEMASTUS (CHEMASTUS) PLATYNOTAE, new species. 



Female. — Length C mm., antennae 3 mm., ovipositor 2 mm. Head 

 from above more than twice as wide as long, temples weakly rounded; 

 eyes parallel, about as long as width of face; malar space about as 

 long as basal width of mandible; clypeus strongly rounded at apex, 

 about two-thirds as long as interfoveal line, which is nearly twice as 

 long as foveo-ocular line; face shining, weakly punctate, densely 

 so at sides; head otherwise shagrcened; diameter of ocelli slightly less 

 than half as long as postocellar line, which is about a third longer 

 than ocell-ocular line. Thorax slender, propodeum gently, arcuately 

 sloping and reaching distinctly beyond middle of coxae; pronotum 

 laterally shagrcened, impunctatc; mesoscutum sparsely punctate, 

 prescutum more densely so, notauli strong, scutellum punctate, 

 with strong lateral carinae; mesosternum and pleura rather densely 

 punctate, the latter polished, impunctate above; metapleura similarly 

 punctate; propodeal carinae strong, areola and petiolar areas con- 

 fluent, areas shagrcened, very sparsely, wealdy punctate, petiolar 

 area sparsely transversely rugose; stigma about two-fifths as wide 

 as long, radius arising in middle; second discoidal cell about one- 

 third as wide at base as at apex; hind basitarsus barely half as long 

 as tibia and much shorter than remaining joints united. Abdomen 

 twice as long as head and thorax, compressed portion less than three 

 times as long as deep, fourth tergite much deeper than third, first 

 and second tergites together slightly longer than rest of abdomen; 

 first longer than second; petiole with carinae obsolete toward base, 

 flattened above toward apex, tergite inclosing sternite, postpetiole 

 strongly elevated above level of petiole; second tergite obscurely 

 striately shagrcened, about four times as long as wide at base, slightly 

 wider at apex; ovipositor a little less than twice as long as second 

 tergite. 



