NO. 1981. NEARCTIC SPECIES OF SAW FLIES— ROHWER. 281 



Genus PRISTIPHORA Latreille. 



PRISTOPHORA XANTHOTRACHELA, new species. 



Related to Pristopliora pallicoxa Rohwer, and may be separated 

 from that species by the shorter third antennal joint, elongate 

 middle fovea, black supraclypeal area, and other minor characters. 



Female. — Length 5.5 mm. Labrum truncate apically ; clypeus very 

 slightly, arcuately emarginate; supraclypeal fovese punctiform, deep, 

 confluent with antennal foveas; supraclypeal area narrow, convex; 

 middle fovea deep, elongated; antennal furrows obsolete; postocellar 

 furrow obsolete; postocellar area defined laterally by punctiform 

 fovese, about five times as wide as long; postocellar line distinctly 

 longer than the ocellocular; antennae longer than head and thorax, 

 tapering; third antennal jomt about one-fifth longer than fourth; 

 head below the supraorbital line coarsely granulate; thorax shining, 

 sparsely punctured; stigma short, broadest a little basad of the 

 middle, tapering apically; first transverse cubitus wanting; third 

 cubital cell a little longer than the apical width ; sheath rather broad, 

 slightly convex above, rounded from the upper apex to the base. 

 Black; apex of the clypeus, labrum, mandibles (except piceous apices), 

 palpi, pronotum broadly, tegulse, four anterior legs, posterior legs 

 (except a spot on dorsal apices of femora, apical fourth of tibiae and 

 the tarsi which are black) and venter bright yellow; ^vdngs hyaline, 

 iridescent; venation, including stigma, dark brown; costa yellowish 

 brown. 



Cabin John, Maryland. One female collected April 29, 1912, by 

 M. C. van Duzee. 



Type.— C&t. No. 14798, U.S.N.M. 



