444 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



Complex II. Pachyneuron 



1. Marginal vein thicker and broader (2 to 3 times) than postmarginal . . 2 

 Marginal vein linear or less than twice width of postmarginal; not thick- 

 ened 3 



2. Color deep reddish brown including mid- and hindcoxae; head and thorax 



with reduced umbilicate punctures 20. bromi (Howard) 



Color usually black; mid- and hindcoxae yellow; head and thorax w'ith dis- 

 tinct umbilicate punctiu-es 21. pachyneuron Girault 



3. Body color light brown; legs and coxae yellow; sixth tergum two or more 



times the length of five and unsculptured laterally. 



22. eragrostidis (Howard) 

 Body color dark reddish brown including coxae; sixth tergum about 1}^ times 

 the length of the fifth and finely sculptured laterally to dorsal surface. 



23. neomexicana Girault 



Complex III. Gigantea 



1. Abdomen in lateral view deeply oval to circular in outline; strongly com- 



pressed; ovipositor tilted dorsad so that it is transverse to the longitudinal 



axis of the abdomen 2 



Abdomen in lateral view elongate; if ovipositor is tilted dorsad, it is only 

 slightly above the longitudinal axis of the abdomen 6 



2. Marginal vein broad in relation to postmarginal; postmarginal half the length 



of marginal; prominent striae converging on the clypeus, covering lower 

 half of face; first funicle segment twice as long as broad. 



24. californica Ashmead 



Marginal vein linear or nearly same width as postmarginal; the latter more 



than half the length of marginal; striae absent or only a few present . . 3 



3. Sixth gastral tergum strongly sculptured on sides, this sculpture extending 



dorsally nearly or to the horizontal dorsal portion of tergum 4 



Sixth tergum smooth and polished dorsally; lateral sculpturing limited to 

 lower two-thirds or less 5 



4. Ninth gastral tergum long, its cerca located five or sLx times the long diam- 



eter of cereal scar from apex of tergum; margin of scrobe cavity with a 

 distinct angle or tubercle a little above base of scape; scape, tegula, and 



legs black 25. gigantea Walsh 



Ninth tergum much shorter, the cereal scar not more than two or three times 

 its own length from apex of tergum; margin of scrobe cavity without angle 

 or tubercle; scape, tegula, and legs except coxae, testaceous. 



26. querci-globuli (Fitch) 



5. Legs with reddish-brown infuscation on femora and tibiae; propodeum with 



a wide incomplete median furrow that narrows ventrally. 



27. solenozopheriae Ashmead 



Legs with femora and tibiae yellow; propodeum with a complete, wide median 



furrow that maintains same width dorsoventrally . . . 28. furva Bugbee 



6. Face clothed with dense, long, recumbent yellow hair; legs more or less 



reddish 29. pissodis Girault 



Face clothed with less dense, recumbent silvery white hair; legs yellowish 

 brown 7 



7. Head unusually thick anteroposteriorly, anterior surface viewed in profile 



from above strongly convex; sixth gastral tergum laterally as well as 

 dorsally very nearly sculptureless; legs, including anterior and midcoxae, 



