LITERATURE CITED
- Baker, C. M., and P. F. Torchio. 1968. New records of Ascosphaera apis from North America. Mycologia 60: 189–190.
- Boucias, D. G., C. W. McCoy, and D. J. Joslyn. 1982. Isozyme differentiation among 17 geographical isolates of Hirsutella thompsonii. J. Invert. Pathol. 39: 329–337.
- Hoefer Scientific Instruments. 1980. Micro-analytical instruments for biochemical research. Vol. 1. 112 p.
- Joslyn, D. J., and D. G. Boucias. 1981. Isozyme differentiation among three pathotypes of the entomogenous fungus Nomuraea rileyi. Canad. J. Microbiol. 27: 364–366.
- Kish, L. P. 1980. Spore germination of Ascosphaera spp. associated with the alfalfa leafcutting bee, Megachile rotundata. J. Invert. Pathol. 36: 125–128.
- May, B., D. W. Roberts, and R. S. Soper. 1979. Intraspecific genetic variability in laboratory strains of Entomophthora as determined by enzyme electrophoresis. Exp. Mycol. 3: 289–297.
- Nei, M. 1972. Genetic distance between populations. Amer. Naturalist 106: 283–291.
- Prökschl, H. 1953. Beiträge zur Kenntnis der Entwicklungsgeschichte von Pericystis apis Maassen. Arch. Mikrobiol. 18: 198–208.
- Shaw, C. R., and R. Prasad. 1970. Starch gel electrophoresis—a compilation of recipes. Biochem. Genet. 4: 297–320.
- Skou, J. P. 1972. Ascosphaerales. Friesia 10: 1–24.
- Skou, J. P.. 1975. Two new species of Ascosphaera and notes on the conidial state of Bettsia alvei. Friesia 11: 62–74.
- Skou, J. P.. 1982. Ascosphaera asterophora species nov. Mycotaxon 14: 149–159.
- Skou, J. P., and K. Hackett. 1979. A new homothallic species of Ascosphaera. Friesia 11: 265–271.
- Spiltoir, C. F. 1955. Life cycle of Ascosphaera apis (Pericystis apis). Amer. J. Bot. 42: 501–508.
- Spiltoir, C. F., and L. S. Olive. 1955. A reclassification of Ascosphaera apis (Pericystis apis). Mycologia 47: 238–244.
- Steiner, W. W. M., and D. J. Joslyn. 1979. Electrophoretic techniques for the genetic study of mosquitoes. Mosquito News 39: 35–54.
- Stejskal, M. 1974. Arrhenosphaera cranei, gen. et sp. nov. a bee-hive fungus found in Venezuela. J. Apicult. Res. 13: 39–45.
- Stephen, W. P., and J. M. Undurraga. 1978. Chalkbrood in the leafcutting bee. Oregon State Univ. Agric. Exp. Sta. Bull. No. 630.
- Stephen, W. P., and J. M. Undurraga, J. D. Vandenberg, and B. L. Fichter. 1981. Etiology and epizootiology of chalkbrood in the alfalfa leafcutting bee, Megachile rotundata, with notes on Ascosphaera species. Oregon State Univ. Agric. Exp. Sta. Bull. No. 653.
- Varitchak, B. 1933. L'évolution nueléaire dans le sac sporifére de Pericystis apis Maassen et sa signification pour la phylogénie des Ascomycetes. Le Botaniste 25: 343–391.