84 PROC. ENT. SOC. WASH., VOL. 20, NO. 4, APR., 1918 



Neodiprion (Zadiprion) vallicola, new species. 



Female. Length 8.5 mm. Labrum sparsely punctured, obtusely 

 pointed, part projecting beyond the clypeus about as long as the clypeus; 

 clypeus punctured like the front, distinctly somewhat angularly emargin- 

 ate anteriorly; antennal foveae large, joining with the supraclypeal fovea; 

 middle fovea poorly defined, circular in outline and indistinctly con- 

 nected with the ocellar depression; antennal furrows wanting; postocellar 

 line about one-third shorter than the ocellocular line; postocellar area 

 hardly defined; third joint of maxillary palpi distinctly longer than the 

 fourth; front closely, finely punctured, vertex and orbits with distinct 

 separate punctures; antennae wanting; mesonotum with close, rather 

 small distinct punctures; mesoepimerum coarsely punctured; ipectus 

 sparsely and more finely punctured; scutellum coarsely, closely punctured, 

 with a more or less distinct median impression; legs normal for the group; 

 tergum coriaceo-reticulate when magnified thirty-five times; venter 

 granular with a few scattered punctures; emargination of the last ventral 

 segment, broadly arcuate, much wider than deep; pad-like portion of 

 sheath about three times as long as broad. Venation abnormal; third 

 intercubitus wanting; interanal wanting. Dark rufous; orbits, clypeus 

 and supraclypeal area slightly yellowish; anterior part of scutellum, 

 spot on mesoepimerum black; abdomen black and yellow, basil plates 

 piceous, second, third and fourth tergal segments, the remaining tergal 

 and all the ventral segments black at base only, nates rufous, basal part 

 of sheath yellow, apical part rufous. Wings yellowish-hyaline, viterous 

 venation reddish yellow. 



Type-locality. Meadow Valley, Mexico. One female collected 

 by C. H. T. townsend. 



Type. Cat. No. 21721 U. S. Nat. Mus. 



Neodiprion, new subgenus. 



Genotype. Lophyrus lecontei Fitch. 



To this restricted part of the genus Neodiprion, most of the 

 American species belong. The European sertifer is the only spe- 

 cies known to occur out of the Nearctic region. The species 

 are all rather similar and often exhibit considerable variation in 

 color, number of antennal joints, and many of the head charac- 

 ters which in other groups are so reliable. The writer has grouped 

 the females by the shape and structure of the sheath and has fou id 

 this to be a very satisfactory character. In some species the 

 pad-like area is very narrow and the concavity between it and the 

 central part of the sheath is wide, in others the pad-like MIVI is 

 broad and is very close to the central part of the sheath. Other 

 characters which have been found useful are: The emargination 

 of the last sternite in the female; the shape of the antennal joints: 



