2070 Hymenoptera in America North of Mexico 



Ceratias Robertson, 1903. Amer. Ent. Soc, Trans. 29: 168. Preocc. 

 Type-species: Megachile pugnatus Say. Orig. desig. 



Sayapis Titus, 1905. Ent. Soc. Wash., Proc. 7: 154. Proposed to replace Gnathocera 

 Provancher and Ceratias Robertson. 

 dentipes Vachal. South. Tex. to Paraguay. 



Megachile dentipes Vachal, 1909. Rev. de Ent. 28: 12. 3. 



Megachile poculifera Cockerell, 1919. U. S. Natl. Mus., Proc. 55: 217. 6. 

 fidelis Cresson. Mont, and S. Dak., Nebr., N. Mex., west to Idaho, Oreg., Calif. Pollen: 



Polylectic, visits a wide variety of flowers, notably those of the family Compositae; 

 visitation records include Aster canescens, A. delectabilis, Calycadenia multiglandulosa, 

 Ceanothus leucodermis, Chrysopsis fastigiata, C. villosa, Chrysothamnus nauseosus, C. 

 viscidiflorus typicus, Cirsium, Cleome serrulata, Cleomella, Coreopsis lanceolata, 

 Croton califomicus. Cosmos, Daucus carota, Erigeron divergens, E. stenophylliis, 

 Eriogonum fasciculatum var. polifolium, E. latifolium var. nudum, E. subscaposiim, E. 

 wrightii, Grindelia camporum, G. stricta var. procumbens, Gutierrezia califomica, G. 

 sarothrae, Haplopappus arborescens, H. bloomeri var. angustatus, Helenium bigelovii, 

 H. puberulum, Helianthus gracilentus, H. petiolaris, Heliopsis, Heterotheca, Lotus 

 scoparius, Lupinus, Marrubium vulgare, Mentha pulegium, Monarda, Phacelia, 

 Rhamnus califomica, Rudbeckia califomica, Senecio douglasii, Solidago califomica, S. 

 confinis. Verbena, Viguiera. 



Megachile fidelis Cresson, 1878. Amer. Ent. Soc, Trans. 7: 120. 9,6. 



Megachile fidelis var. concinnula Cockerell, 1899. Entomologist 32: 158. i. 

 frugalis frugalis Cresson. Pa. and N. J., to Fla., west to Calif.; Mexico. Pollen: Polylectic, visits 

 flowers of Croton, Erigeron, Eriogoniun fasciculatum, Helianthus, Lotus, Marrubium 

 vulgare, Opuntia, Perezia microcephala, Tephrosia virginiana. 



Megachile frugalis Cresson, 1872. Amer. Ent. Soc, Trans. 4: 266. S. 

 frugalis pseudofrugalis Mitchell. Ariz., Calif. Pollen: Polylectic, visits a wide variety of 

 flowers including Acacia greggii, Asclepias erosa. Aster spinosus, Bebbia juncea, 

 Cercidium, Chaenactis, Chilopsis linearis, Clarkia, Cirsium vulgare, Cissus, Cleome 

 serrulata, Croton califomicus, Cryptantha, Dalea emoryi, Encelia califomica, E. 

 farinosa, Eriodictyon crassifolium, Eriogonum. elongatum, E. fasciculatum, E.f var. 

 polifolium, E. wrightii, Grindelia, Gutierrezia camporum, G. sarothrae, Haplopappus 

 squarrosus, Helianthus gracilentus, Hemizonia fasciculata, Hyptis emoryi, Lotus 

 hamatus, L. scoparitis, Marrubiimi vulgare, Melilotus, Perezia microcephala, 

 Penstemon, Petalonyx thurberi, Prosopis glandulosa var. torreyanum, P. pubescens. 

 Salvia clevelandii, Sapindus, Senecio douglasii, Tamarix gallica, Trichostema parishii, 

 Verbesina encelioides, Wislizenia refracta. 



Megachile (Sayapis) frugalis var. pseudofrugalis Mitchell, 1937. Amer. Ent. Soc, Trans. 

 63: 186. 6,9. 

 helianthi Cockerell. Colo. Pollen: Unknown, but visits flowers of Helianthus lenticularis. 



Megachile helianthi Cockerell, 1908. Ann. and Mag. Nat. Hist. (8) 1: 259. 9. 

 inimica inimica Cresson. Fla. to Tex., Ariz.; Mexico south to Guatemala. Ecology: Nests in 



holes in mesquite trees and mesquite fence posts, and uses leaves of Monisia pallida to 

 line their nests; also nests in trap nests which were plugged with 5mm. of firmly 

 agglutinated sand by this species. Parasite: Melittobia chalybii Ashm. Pollen: Polylectic, 

 visits flowers of Achyranthes, Avice^inia, Bidens leucantha, Borrichia frutescens, 

 Coccoloba, Crotalaria pumila, Helenium, Heliopsis, Heterotheca, Lacinaria punctata, 

 Melilotus, Ocimum, Salvia ballotaeflora, Sphaeralcea, Vitex negundo var. incisa, 

 Ximensia encelioides. 



Megachile iniynica Cresson, 1872. Amer. Ent. Soc, Trans. 4: 267. 9. 



Biology: Krombein, 1967. Trap-nesting wasps and bees, pp. 331-332 (life history, nest 

 architecture, parasite). 

 inimica jacumbensis Mitchell. Calif.; Mexico (Baja California). Pollen: Apparently polylectic, 

 visits flowers oi Chrysothamnus, Eriogonum fasciculatum, Haplopappus arborescens, 

 Heterotheca grandiflora, Grindelia camporum, Seyiecio douglasii, Solidago. 

 Megachile inimica \ar. jacumbensis Mitchell, 1927. Psyche 34: 109. 



