10 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



22. Wings usually subhyaline or somewhat fuliginous; recurrent vein sometimes 



entering second cubital cell at extreme base, but often interstitial -with first 

 intercubitus; lower abscissa of basella nearly always a little longer than either 

 nervellus or upper abscissa of basella; ovipositor sheaths about two-thirds as 



long as the abdomen 20. diinidiatus (Cresson) . 



Wings perfectly clear hyaline; recurrent vein always distinctly entering second 

 cubital cell; lower abscissa of basella not distinctly longer than nervellus or 

 upper abscissa of basella; ovipositor sheaths about half as long as abdomen. 



21. bakeri Cook and Davis. 



23. Recurrent vein entering second cubital cell; antennae with 33-35 segments, very 



rarely with 32 or 36; mesonotal lobes polished, not distinctly punctate. 



22. autographae, new species. 



Recurrent vein interstitial with first intercubitus; antennae \vith 26-32 segments; 



mesonotal lobes closely shallowly punctate, not polished. .23. vulgaris (Cresson) 



24. Propleura, except along, upper margin, wholly coarsely rugulose or ruguloso- 



punctate and not strongly shining; propectus roughened; propodeum evenly 

 rugoso-reticulate, usually without prominent carinae, but with posterior de- 

 clivity hollowed out medially; first tergite usually mostly smooth, the striae 



very fine and strongly convergent posteriorly 25 



Propleura not so completely rugulose, shining; otherwise not combining the 

 above characters 27 



25. Body color usually ferruginous; wings often subhyaUne or faintly tinted with 



brownish; male antennae fuscous; first abscissa of radius much shorter than 

 second, the latter distinctly more than half as long as first intercubitus; malar 

 space as long as basal width of mandible; ocell-ocular Line distinctly longer 



than greatest diameter of an ocellus 26 



Body color pale testaceous; wings hyaline; antennae of both sexes pale; first 

 abscissa of radius nearly as long as second, the latter about half as long as first 

 intercubitus; malar space shorter than basal width of mandible. 



24. laphygmae Viereck. 



26. Female antennae 33-35 segmented; male antennae 34-37 segmented; recurrent 



vein always entering first cubital cell near apex; intercubital veins usually 

 almost parallel; nervellus about equal to lower abscissa of basella. 



25. proximus (Cresson), 

 Female antennae 28-31 segmented; male antennae with 32-35 segments; recurrent 



vein usually interstitial with first intercubitus; intercubital veins not so nearly 

 parallel; nervellus always longer than lower abscissa of basella. 



26. arizonensis, new species. 



27. Head flat behind, descending vertically behind lateral ocelli; occipital carina 



very poorly defined medially, sometimes incomplete; first abscissa of radius 

 as long as the second; recurrent vein entering second cubital cell; propodeum 

 short, the posterior declivity abrupt; propodeum, apex of posterior coxae 

 below, and the discal trochanters below, black or brown. 



27. acronyctae, new species. 



Head not so flat behind; occipital carina strong, complete; first abscissa of radius 



rarely as long as second ; propodeum normal 28 



28. Recurrent vein entering first cubital cell; antennae with 27-30 segments, rarely 



31 in the male 28. versicolor (Wesmael). 



Recurrent vein nearly always interstitial with first intercubitus or indistinctly 

 entering extreme base of second cubital cell; antennae with 32-38 segments, 

 rarely 31 in female 29 



