90 U. S. NATIONAL MUSEUM BULLETEST 209 



The name Hemipogonius Saussure 1892, is sometimes listed as a 

 synonym of Priocnemis. Its genotype has not been available for 

 study. 



Keys to the Nearctic species of the subgenus Priocnemis 



MALES 



(The male of P. ahhreimtus is unknown.) 



1. Subgenital plate with the hairs distributed evenly over its entire surface, 



usually broad 2 



Subgenital plate with the hairs restricted to certain areas, narrow .... 7 



2. Sixth sternite with a medium apical pair of parallel ridges (in addition to the 



usual lateral hooks) ; hair on subgenital plate long and suberect. 



4. hestia (Banks) 



Sixth sternite without a median apical pair of parallel ridges (with a pair of 



low convergent ridges in P. aequalis) ; hair on subgenital plate either short 



and depressed or long and recurved 3 



3. Subgenital plate narrow, its exposed portion about 2.3 as long as wide; hair on 



subgenital plate long and strongly recurved; frons mat, not distinctly 



punctate 6. cornica (Say) 



Subgenital plate broad, its exposed portion about 1.3 as long as wide; hair on 

 subgenital plate depressed, rather short; frons mat to subpoHshed, with 

 distinct punctures 4 



4. Sixth sternite with a median apical pair of weak convergent ridges; punctures 



on frons weak, separated by about 1.0 to 2.0 their diameter. 



3. aequalis (Banks) 



Sixth sternite without a median pair of ridges; punctures on frons stronger, 



separated by about 0.3 to 1.0 their diameter 5 



5. Apical margin of clypeus with a sublateral thickening, impression, or pit (the 



development of this structure is extremely variable) ; frons and pleura a 



little less polished 1. germana (Cresson) 



Apical margin of clypeus sharp, unspecialized; frons and pleura a little more 

 polished, subspecies of scitula 6 



6. Coxae black or blackish; femora and abdomen often without fulvous markings. 



2a. scitula relicta Banks 

 Coxae largely or entirely fulvous; femora and abdomen largely fulvous. 



2b. scitula scitula (Cresson) 



7. Subgenital plate with a single median longitudinal row of long suberect setae, 



otherwise bare 6. minuscula (Banks) 



Subgenital plate with hairs in patches, not with a single median row of 

 setae 8 



8. Subgenital plate without a median erect tooth or a median pair of elongate 



tubercles; frons mat, indistinctly punctate ... 8. nigriceps (Ashmead) 



Subgenital plate with a median raised tooth or pair of elongate tubercles; 



frons subpolished, with sharp punctures, subspecies of notha ... 9 



9. Subgenital plate with a median pair of elongate tubercles or ridges; abdomen 



black 10 



Subgenital plate with a median erect tooth or pair of teeth; abdomen with its 



basal half often rufous 11 



10. Range: Upper Sonoran Zone of the Rocky Mountain area, westward to the 

 Pacific 9a. notha navajo Banks 



