1676 Hymenoptera in America North of Mexico 



Genus ENOPLOLINDENIUS Rohwer 



The genus occurs only in the New World. Nothing is known of the biology, but morphological 

 characters of the female suggest that these are ground-nesting species. 



Revision: Pate, 1942. Rev. de Ent. 13: 386-421 (New World spp.). 



Genus ENOPLOLINDENIUS Subgenus ISKUTANA Pate 



Enoploli7idenins subg. Iskutana Pate, 1942. Rev. de Ent. 13: 390. 



Type-species: Enoplolindenius (Iskutana) georgia Pate. Grig, desig. 



robertsoni (Rohwer). Ga., La., Tex., Kans., Nebr., Iowa, 111. 



Lind€7iius robertsoni Rohwer, 1920. Ent. Soc. Wash., Proc. 22: 57. 6. 

 Enoplolindenius (Iskutana) georgia Pate, 1942. Rev. de Ent. 13: 393. 6. 

 Enoplolindeyiius (Iskutana) ponca Pate, 1942. Rev. de Ent. 13: 395. 9. 



Genus ENOPLOLINDENIUS Subgenus ENOPLOLINDENIUS Rohwer 



Lindenius subg. Enoplolindenius Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 562. 

 Type-species: Liiidenius (Enoplolindenius) clypeatus Rohwer. Grig, desig. 

 clypeatus (Rohwer). Tex. (Brownsville). 



Lindenius (Enoplolindeyiius) clypeatus Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 562. S . 



Genus ECTEMNIUS Dahlbom 



In the North American fauna a number of species nest in the soft pith of living or dead stems 

 or twigs; the nests of these species consist usually of a linear series of cells separated from each 

 other by partitions of pith particles. Other species make burrows in decaying wood. None of our 

 species has been reported as nesting in the ground, as do members of several extralimital sub- 

 genera, but morphological characters of the females suggest that members of the subgenus 

 Prototliyreopus nest in the ground. 



Genus ECTEMNIUS Subgenus PROTOTHYREOPUS Ashmead 



Prototliyreopus Ashmead, 1899. Canad. Ent. 31: 170. 



Type-species: Crabro rufifemur Packard. Grig, desig. 



Nothing is known of the biology of this subgenus, but the species probably nest in the ground. 



dilectus (Cresson). Transit, and U. Austr. Zones in most of U. S. except west of Sierra Nevada 

 and Cascade ranges. 

 Crabro dilectus Cresson, 1865. Ent. Soc. Phila., Proc. 4: 478. 9, 6. 

 Crabro bigeminus Patton, 1879. Canad. Ent. 11: 213. 9, 6. 



Crabro (Prototliyreopus) megacephaius Rohwer, 1908. Ent. News 19: 249. 9. Preocc. 

 Crabro (Prototliyreopus) dilectiforviis Rohwer, 1909. Ent. News 20: 146. 9. 

 Crabro (Prototliyreopus) crassiceps Mickel, 1916. Amer. Ent. Soc, Trans. 42: 425. 9. 



Taxonomy: Pate, 1946. Notulae Nat. 171: 2 (synonymy). 

 rufifemur rufifemur (Packard). Transit, and U. Austr. Zones east of Rockies. Another subsp. 

 occurs in Mexico. 

 Crabro rufifemur Packard, 1866. Ent. Soc. Phila., Proc. 6: 81. 9, cJ. 



Genus ECTEMNIUS Subgenus CLYTOCHRYSUS Morawitz 



Crabro subg. Clytoclirysus Morawitz, 1864. Acad. Imp. Sci. St. Petersburg, Bui. 7: 453. 



Type-species: Crabro clirysostomus Lepeletier and Brulle. Desig. by Richards, 1935. 



Several species of this subgenus are known to nest in decaying wood of logs or stumps. The 

 burrows may have a number of branches each ending in one or two cells. 



lapidarius (Panzer). U. S. and Canada, transcont. in Canad., Transit, and U. Austr. Zones; 

 Palaearctic also. Ecology: Nests in rotting stumps or logs, stores 2-16 prey per cell, 

 makes 1-2 cells at end of each branch of the burrow and as many as 16 cells per nest. 



