14 U. S. NATIONAL MUSEUM BULLETIN 216 



Flagellum with about 36 segments; yellow on frons extending upward to just 

 below center of eye emargination; body punctation rather strong. 



5. opacitas Davis 



6. Punctures on outer face of mandible rather fine; punctures on central part of 



face rather fine and weak, their interspaces about equal to their diameter. 



8. recurvus, new species 



Punctures on outer face of mandible coarse; punctures on central part of face 



moderate, their interspaces about 0.6 their diameter 7 



7. Face about 1.2 as high (measured from center of clypeal fova to lower edge of 



antennal socket) as the mouth is wide (measured between bases of mandi- 

 bles); side of frons yellow upwards to center of eye emargination; front 



wing 3.0 to 3.8 mm. long 6. constrictus Davis 



Face about 0.8 to 1.0 as high as mouth is wide; frons usually without yellow 

 laterally, but when there is yellow laterally, it usually does not extend up- 

 ward to center of eye emargination; front wing 2.9 to 5.4 mm. long. 



7. funebris (Gravenhorst) 



FEMALES 



1. Pronotum with small punctures from its dorsal margin down almost to its 



trough; longitudinal carinae of first tergite just above and below the spiracle 

 meeting apically in about a 25° angle; propodeal spiracle usually nearer 

 lateral carina than pleural carina; front wing 4.5 to 7.0 mm. long; face 

 black, yellow next to eye and on the interantennal process (figs. 178,a,b). 



1. longicalcar Thomson 



Pronotum with small punctures from its dorsal margin down about 0.66 the 



distance to its trough; longitudinal carinae of first tergite just above and 



below the spiracle meeting apically in about a 45° angle; propodeal spiracle 



not nearer lateral carina than pleural carina 2 



2. Upper tooth of mandible about 1.5 times as large as hywer tooth; mandible 



about 1.85 to 2.0 as long as wide 3 



Upper tooth of mandible about 3 times as large as lower tooth; mandible about 

 2.1 to 2.7 as long as wide 5 



3. Face blackish medially (fig. 178,f); second segment of middle tarsus about 



1.35 as long as wide 5. opacitas Davis 



Face entirely yellow (figs. 178,d,e); second segment of middle tarsus about 

 2.25 as long as wide 4 



4. Hind coxa entirely fulvous 3. excessoriu* Davis 



Hind coxa blackish, fulvous apically 4. californicus Ashmead 



5. Apical margin of clypeus strongly concave (fig. 178,1). 



10. emorsus, new species 

 Apical margin of clypeus almost straight or faintly concave (figs. 178,c,g,h,j,k) 6 



6. Front spur of middle tibia almost exactly as long as hind spur of middle tibia; 



face entirely yellow (fig. 178,c) ; side of frons yellow to above center of eye 



emargination 2. aequalis, new species 



Front spur of middle tibia not more than 0.85 as long as hind spur of middle 

 tibia; face usually partly dark (figs. 178,g-k) 7 



7. Clypeus blackish (figs. 178,j,k) 8 



Clypeus yellow (figs. 178,g-i) 9 



8. Face blackish, yellowish next the eye (fig. 178,j); mandible subapically rather 



strongly incurved 8. recurvus, new species 



Face almost entirely yellow (fig. 178,k) ; mandible subapically without an 

 unusually strong curvature 9. labiosus, new species 



