118 U. S. NATIONAL MUSEUM BULLETIN 209 



7. Wings less extensively infuscate, about 0.3 of the first brachial cell and about 



0.6 of the second discoidal cell infuscate (pi. I, fig. 9); range: east of the 



Rocky Mountains 7a. sayi sayi Banks 



Wings more extensively infuscate, about 0.6 of the first brachial cell and about 

 0.85 of the second discoidal cell infuscate (pi. 2, fig. 28); range: Rocky 

 Mountains to the Pacific 7b. sayi nigrior, new subspecies 



8. Punctures on posteromedian part of propodeum separated by about 2.5 their 



diameter; punctures on mesopleuron separated by about 0.7 their diameter; 



thorax black or rufous, subspecies of calipterus 9 



Punctures on posteromedian part of propodeum separated by about 0.4 their 

 diameter; punctures on mesopleuron separated by about 0.2 their diameter; 

 thorax rufous 11 



9. Thorax rufous ; range : Florida. 3c. calipterus duplicatus, new subspecies 

 Thorax black 10 



10. Front coxa black; range: eastern United States, except Florida. 



3a. calipterus calipterus (Say) 

 Front coxa ferruginous; range: Mexico and southern California. 



3b. calipterus nubifer (Cresson) 



11. First tergite blackish; coxae blackish to dusky rufous; clypeus without a 



median subapical swelling; punctures of mesopleuron weak and indistinct. 



4. thoracicus, new species 

 First tergite rufous; coxae rufous; clypeus with a weak median subapical swell- 

 ing; punctures of mesopleuron sharp and distinct (though small and close). 



5. iraciindus, new species 



PULCHRIPENNIS GROUP 



Cubital vein not quite reaching the wing margin; radial vein not 

 more strongly angled at its juncture with the second intercubital vein 

 than at its juncture with the third intercubital vein; clypeus of female 

 with a median, transverse, subapical impression; hooks on sixth 

 sternite of male short and pointed backward; subgenital plate of male 

 bulbous basally, tapered to a long point apically. 



The Nearctic pulchripennis and papago are the only known species 

 of this group. 



1. Dipogon (Deuteragenia) pulchripennis (Cresson) 



Plate 2, figure 26 



Pompilus (Agenia) pulchripennis Cresson, 1867, Trans. Amer. Ent. Soc, vol. 1, 

 p. 123, cf , 9 • Lectotype: 9 , West Virginia (Philadelphia). 



Male : Forewing 5.3 to 6.5 mm. long; flagellar segments subcylindric 

 and unusually long, without the angular swellings usual to this genus ; 

 first segment of flagellum about 2.2 as long as wide; mesopleuron a 

 little more finely and densely punctate than in D. papago anomalus; 

 apical 0.6 of subgenital plate somewhat flattened below and with a 

 median longitudinal groove. 



Black. Wings subhyaline, the forewing with a narrow infuscation 

 along the basal vein and nervulus, and with a large subapical fuscous 

 area. 



Female: Forewing 7 to 10 mm. long; clypeus with a sharp median 

 transverse impression that is so near the apical margin that the margin 



