THE GENUS MONODONTOMERUS — GAHAN 463 



8. Dorsum of thorax uniformly coppery green 5. mexicanus, new species 



Dorsum of thorax dark green with only a very slight brassy 



tint 6. indiscretus, new species 



9. Propodeum laterad of median depression very weakly sculp- 



tured, practically smooth; fore wing with a distinct stigmal 



cloud; eyes conspicuously pilose 7. obscunis Westwood 



Propodeum laterad of median depression distinctly sculptured; 

 stigmal cloud very faint or absent; eyes with very short, 

 sparse, inconspicuous pile 10 



10. Mandibles tridentate, ventral tooth not or only slightly extend- 



ing beyond apex of middle tooth, and inner tooth only 

 slightly basad of other tw^o; all three teeth short-. 8. montivagus Ashmead 

 Mandibles bidentate, ventral tooth elongate and acute, inner 

 tooth small and located far basad of apex of ventral one 



9. mandibularis, new species 



11. Posterior margin of third tergite not emarginate; malar space 



equal to more than half height of eye; ocellocular line equal 

 to nearly twice diameter of a lateral ocellus; pronotum and 



prescutum with strong purplish reflections 10. bakeri, new species 



Posterior margin of third tergite deejjly triangularly emarginate 

 at middle; malar space less than half as long as eye; ocel- 

 locular line only slightly longer than diameter of a lateral 

 ocellus; pronotum very slightly tinged with purplish, pre- 

 scutum without purple reflections 11. emarginatus, new species 



12. Tooth on posterior femur about its own length before apex of 



femur; punctate groove setting off marginal frenum on 

 scutellum continued uninterruptedly around apex of scutel- 



lum; median depression on propodeum sharply triangular 13 



Tooth on posterior femur at least twice its own length before 

 apex of femur; punctate groove setting off marginal frenum 

 more or less interrupted at apex of scutellum; median de- 

 pression on propodeum sometimes about as broad poste- 

 riorly as anteriorly 14 



13. First tergite dorsally distinctly reticulately sculptured on apical 



half; ovipositor half to two-thirds as long as abdomen; 

 mesoscutum blackish, scutellum dark green; scape of female 

 usually metallic green ; scape and face of male metallic green 



12. dentipes (Dalman) 

 First tergite not sculptured dorsally; ovipositor not over half 

 as long as abdomen; mesoscutum and frequently scutellum 

 strongly purplish or violaceous; scape of female testaceous, 

 sometimes slightly metallic toward apex; scape and face of 

 male brassy green 13. japonicus Ashmead 



14. Median depression on propodeum acute posteriorly or at least 



subacute; sculpture on propodeum laterad of the median 

 depression consisting of obliqueh^ transverse rugae; tooth on 



posterior femur slender 14. subobsoletus, new species 



Median depression on propodeum about as broad posteriorly 

 as anteriorly; sculpture laterad of median depression more 

 reticulate; tooth on posterior femur broader at base and 

 somewhat less slender 15. obsoletus (Fabricius) 



