1478 Hymenoptera in America North of Mexico 



Only the typical subgenus occurs in North America. The nests are constructed in pre-existing 

 cavities, usually in stems or twigs, but a Mexican species is recorded as nesting in a rock crevice, 

 and the type-species from Europe apparently nests only in empty snail shells. The species are 

 known to prey upon larvae of Coleoptera or Lepidoptera, or sometimes a combination of both. 



Revision: Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 153-229, 239 figs., 18 maps (Nearctic 

 spp.). 



Species Group Mesolobus 



mesolobus Parker. Southern Calif, in Mojave Desert. 



Leptochilus mesolobus Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 177, figs. 33, 38, 39, 42, 

 43, map 16. cJ, 9. 



Species Group Minutissimus 

 Taxonomy: Bohart, 1940. Pan-Pacific Ent. 16: 87 (group characters). 

 gibberus Parker. Southern Ariz, in mts. 



Leptochilus gibberus Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 180, figs. 34, 37, 40, 44, 

 45, map I. 3 , 9 . 

 minutissimus (Bohart). Tex. to Calif., Nev.; Mexico (Baja California). 



Odynenis minutissimus Bohart, 1940. Pan-Pacific Ent. 16: 87. S, 9. 

 petilus Parker. Southwest Tex.; Mexico south to Oaxaca and Puebla. Ecology: Nest in old 

 beetle burrow in dead twig. Prey: Leaf-mining larvae of Coleoptera. 

 Leptochilus petilus Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 178, figs. 35, 36, 41, 46, 47, 

 map 1. (J, 9. 



Biology: Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 166, fig. 4 (nest, prey). 



Species Group Erubescens 



Both species nest in twigs and use macerated pith rather than mud in nest construction. 



Taxonomy: Bohart, 1940. Pan-Pacific Ent. 16: 89 (group characters). 

 erubescens (Bohart). Wash, and Idaho south to Calif, and Nev. Ecology: Nests in Sambucus 

 stems. Prey: Larvae of Coleoptera. 

 Odynerus erubescens Bohart, 1940. Pan-Pacific Ent. 16: 89. 6, 9. 



Biology: Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 162 (nest, life history). 

 periallis Parker. Oreg., Calif., Nev., Utah, Ariz. Ecology: Nests in Hving and dead stems and 

 twigs. Parasite: Anthrax irroratus Say; Aritranis notata sierrae Tow.; 

 Microdontomems anthidii (Ashm.); Ceratochrysis thysana Boh. Prey: Larvae of 

 Gelechioidea. 

 Leptochilus periallis Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 182, figs. 50-54, 58, 59, 

 map 2. S, 9. 



Biology: Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 160-162, fig. 2 (nest, life history). 



Species Group Bellulus 



autumnus Parker. Western Nev. 



Leptochilus autumnus Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 185. 9. 

 bellulus (Cresson). Ga., Ala., Miss., Ark., Okla., Tex.; Mexico (Tamaulipas, Veracruz, 

 Guanajuato). 

 Odynerus belluius Cresson, 1872. Amer. Ent. Soc, Trans. 4: 243. 9 . 

 Odynerus fedorensis Cameron, 1908. Amer. Ent. Soc, Trans. 34: 200. S. 

 elienae Parker. Calif., Ariz. Ecology: Nests in old beetle borings in dead Ephedra branches. 

 Leptochilus elienae Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 185, figs. 60, 63-65, 71, 72, 

 map 3. cJ, 9. 



Biology: Parker, 1966. Ent. Soc. Amer., Misc. Pub. 5: 162 (nest). 

 marshi Parker. N. Mex., Ariz. 



Leptochilus marshi Parker, 1966. Ent. Soc Amer., Misc. Pub. 5: 184, figs. 61, 69, 70, map 3. 



6, 9. 



