no. 2374. NEW WASPS OF SUBFAMILY NYSSONINAE—ROHWER. 409 



frontal carina fine, incomplete; front and vertex shining, with dis- 

 tinct punctures which are separated from each other by about their 

 diameter; no tubercles between the ocelli; antenna stout, the third 

 and fourth joints subequal, apical joint blunt, distinctly longer than 

 the eleventh but not much longer than the tenth; anterior lateral 

 angles of pronotum rounded; mesoscutum with a faint median, 

 longitudinal depression anteriorly, the surface with rather coarse, 

 close punctures which are often confluent and form what at first 

 glance appears as a coriaceous surface; mesepisternum sculptured 

 similar to the scutum but there is a tendency to irregular reticula- 

 tions; scutellum not margined laterally, sculptured similar to the 

 scutum; propodeum dorsally with strong, rather regular rugae; the 

 propodeal spines small, sharp; posterior face of propodeum without 

 carinae, coarsely reticulate; nervellus interstitial; abdomen shining, 

 the two basal tergites with rather large, close (sometimes confluent) 

 punctures, apical tergites more sparsely punctured; pygidium trun- 

 cate apically, with large, irregular punctures. Black with rather 

 dense, silvery pile which on the clypeus almost hides the sculpture; 

 mandibles with an obscure yellowish spot medianly; first two tergites 

 with small, lateral yellow spots; wings dusky hyaline, venation dark 

 brown. 



Type locality. — St. Louis, Missouri. 



Type.— Cat. No. 23153, U.S.N.M. 



Described from one female collected June 13, 1918, by Phil Rau 

 and under his number 3535. 



NYSSON (BEACHYSTEGUS) FOXH, new species. 



In Bradley's key 4 runs to mellipes but may readily be distinguished 

 from that and similar species by the absence of tubercles between the 

 ocelli, larger size, and continuous bands on first tergites. 



Male. — Length, 8.5 mm. Apical portion of clypeus with large 

 punctures; head with rather large, separate punctures and with 

 smaller punctures in the interspaces; ocelli in a low triangle; the 

 postocellar line subequal with the ocellocular line; no tubercles be- 

 tween the ocelli; antenna short, not reaching the tegula, stout, 

 thickening apically, the third joint a very little longer than the fourth, 

 apical joint somewhat longer than the preceding, not curved, obliquely 

 truncate apically; pronotum rounded, not angulate or acute laterally; 

 mesoscutum with large, sometimes contiguous punctures on a finely 

 punctured surface; scutellum sharply margined laterally, very coarsely 

 striato-punctate; basal dorsal area of propodeum with longitudinal 

 ridges, the three median ones being better defined and parallel; the 

 posterior face of propodeum with four carinae and with irregular 

 transverse ridges; abdomen with distinct, separate (on three basal 



* Trans. Amor. Ent. Soc, vol. 46, 1920, p. 122. 



