2192 Hymenoptera in America North of Mexico 



Biology: Putnam, 1864. Essex Inst. Salem, Proc. 4: 98-105 (habits). —Packard, 1864. Essex 

 Inst. Salem, Proc. 4: 107-140, pi. 3 (life histories of New England spp., parasites). 



— Putnam, 1865. Essex Inst. Salem, Proc. 4: 98-105 (life histories of New England spp.). 

 — Coville, 1890. Ent. Soc. Wash., Proc. 1: 197-203 (life histories). — Sladen, 1912. The 

 humble bee, its life history and how to domesticate it, xiii and 283 pp., London Macmillan. 



— Fantham and Porter, 1914. Tropical Med. Parasit., Ann. 8: 623-638 (parasitism by 

 Nosema bombi). —Wheeler, 1919. Psyche 26: 145-152 (phoresy oi Antherophagus). 

 — Betts, 1920. Bee World 1: 171 {Nosema). -Prison, 1921. Amer. Nat. 55: 188-192 

 {Antherophagus in nests). — Plath, 1922. Psyche 29: 189-202 (nesting habits). — Plath, 1923. 

 Psyche 30: 145-154 (colony trumpeter). —Plath, 1923. Biol. Bui. 45: 325-341 (queen 

 breeding experiments). —Plath, 1923. Psyche 39: 193-202 (egg-eating habits). —Plath, 1923. 

 Amer. Nat. 57: 571-574 (skunk predation). -Plath, 1924. Biol. Bui. 47: 65-78, 2 figs, (life 

 histories). —Plath, 1925. Amer. Nat. 59: 441-451 (role of pollination in certain cultivated 

 crops). -Prison, 1926. Ent. Soc. Amer., Ann. 19: 203-234, pi. XVII (natural enemies of 111. 

 spp.). —Prison, 1926. Econ. Ent., Jour. 19: 149-155 (artificial domiciles). —Plath, 1927. Ent. 

 Soc. Amer., Ann. 20: 181-192 (hibernation). —Plath, 1927. Psyche 34: 122-128, 2 figs, 

 (nesting habits of some New England spp.). —Prison, 1927. Econ. Ent., Jour. 20: 522-526 

 (fertilization and hibernation of queens under controlled conditions). —Prison, 1930. Canad. 

 Ent. 62: 49-54 (flight orientation). — Balduf, 1939. Canad. Ent. 71: 66-74 (predation by 

 Phymata). —Plath, 1934. Bumblebees and their ways, 201 pp., New York, MacMillan. 



— Balduf, 1941. Ent. Soc. Amer., Ann. 34: 204-214 (predation by Phyviafa). — Linsley, 

 1944. Brooklyn Ent. Soc, Bui. 39: 48-49 (vernal flight of males). —Cumber, 1949. Roy. Ent. 

 Soc. London, Proc. 100: 1-45, 10 figs, (life history, production of worker caste). —Cumber, 

 1949. New Zealand Sci. Rev. 7: 96-97 (overwintering nest). — Pedersen and Bohart, 1950. 

 Agron. Jour. 42: 608 (use as pollinators of small seed plots). — Loken, 1954. Bergen Univ. 

 Pub., Biol. Sta. 13: 1-6 (behavior during solar eclipse). —Brian, 1954. Bee World 35: 61-67, 

 81-91 (foraging behavior). —Cumber, 1954. New Zealand Jour. Sci. Tech. (B) 36: 95-107 

 (life cycle). — Pye and Medler, 1954. Econ. Ent., Jour. 47: 672-676 (field domiciles). — Fye 

 and Medler, 1954. Wis. Acad. Sci. Arts and Letters 43: 75-82 (spring emergence). —Fye 

 and Medler, 1954. Econ. Ent., Jour. 47: 847-852 (temperature studies of domiciles). —Free, 

 1955. Roy. ent. Soc. London, Proc. (A) 30: 19-25 (queen production). —Free 1955. Ins. 

 Sociaux 2: 195-212 (division of labor within colonies). —Free, 1955. Brit. Jour. Anim. 

 Behav. 3: 147-153 (behavior of egg-laying workers). —Free, 1955. Ins. Sociaux 2: 303-311 

 (collection of food). —Manning, 1956. Behaviour 9: 164-201 (foraging behavior). —Free, 

 1957. Roy. Ent. Soc. London, Proc. 32: 182-184 (social facilitation and ovary development). 

 —Medler, 1957. Ins. Sociaux 4: 252-254 (pollination of alfalfa and red clover). -Free, 1958. 

 Behaviour 12: 233-242 (defense of colony). —Medler, 1958. Xth Internatl. Congr. Ent., 

 Proc. 4: 973-981 (use in pollination of agricultural crops). —Free and Butler, 1959. 

 Bumblebees, xiv and 208 pp., London, Collins. — Hobbs, Virostek and Nummi, 1960. Canad. 

 Ent. 92: 868-872 (artificial domiciling). —Holm, 1960. Arsskr. Kgl. Vet.-Landbhojsk, pp. 

 1-19 (domestication). — Hasselrot, 1960. Opusc. Ent. Suppl. 17: 1-192 (domestication). 



— Pringle, 1961. Nat. Hist. 70: 20-29 (flight behavior). —Montgomery, 1961. Outdoor 

 Indiana 4: 16-22 (bombiculture). —Hobbs, 1962. Canad. Ent. 94: 538-541 (food-gathering 

 behavior). —Medler, 1962. Canad. Ent. 94: 825-833, 1 fig., 3 tables (egg development and 

 absorption). —Hobbs, Nummi and Virostek, 1962. Canad. Ent. 94: 1121-1132 (management 

 for pollination). —Cumber, 1963. New Zealand Jour. Sci. 6: 66-74 (domiciling of an 

 unusually large nest). —Hobbs, 1964. Canad. Ent. 96: 115-116 (brood-rearing behavior). 



— Hobbs, 1964. Canad. Ent. 96: 1465-1470 (ecology of Alpinobombus). —Hobbs, 1965. 

 Canad. Ent. 97: 120-128 (ecology of Bo)}ibias). — Armitage, 1965. Kans. Ent. Soc, Jour. 38: 

 89-100, 4 figs., 4 tables (predation by Philanthus bicinctus). —Hobbs, 1965. Canad. Ent. 

 97: 1297-1302 (ecology of Cullumanobombus). —Knee and Medler, 1965. Canad. Ent. 97: 

 1149-1155 (seasonal size increase in workers). — Plowright and Jay, 1966. Jour. Apicult. 

 Research 5: 155-165 (domestication). —Hobbs, 1966. Canad. Ent. 98: 33-39 (ecology of 

 Fei-vidobombus). —Holm, 1966. Ann. Rev. Ent. 11: 155-182 (management of red clover 

 and alfalfa pollinating spp. for seed production). — Milliron and OHver, 1966. Canad. Ent. 

 98: 207-213, 6 figs, (nests, usurpation and life histories of Ellesmere Island spp.). —Hobbs, 

 1966. Canad. Ent. 98: 288-294 (ecology oi Subterraneobombus). — Johansen, 1967. Wash. 

 State Univ. Tech. Bui. 57: 1-12 (ecology of southwest. Wash. spp.). —Hobbs, 1967. Canad. 



