Superfamily SPHECOIDEA 1607 



Genus STIGMUS Subgenus STIGMUS Panzer 



Stigmus Panzer, 1804. Faunae Ins. German., heft 86, No. 7. 



Type-species: Stigmus pendulus Panzer. Monotypic. 

 Gonostigrnus Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 559. 



Type-species: Gonostigmus typicus Rohwer. Orig. desig. 



Most species nest in pre-existing cavities, often beetle borings, in twigs, wood, structural 

 timber, shelf fungi and galls, but some tunnel in soft pith. The cells are usually placed in a linear 

 series except when old galls are used. 



So far as known, only aphids are preyed upon. 



americanus Packard. Transcont. in Canada from Labrador and N. S. to B. C. and N. W. T., in 

 U. S. east of 100th meridian and Wash. Ecology: Nests most commonly in old beetle 

 borings in dead trees or structural timber, occasionally in twigs; cells in a linear series 

 are separated by partitions of wood or pith particles, but there is an authentic record of 

 two wasps developing in a single brood chamber. Parasite: Omalus janus (Hald.), 0. 

 iridescens (Nort.), 0. purpuratus (Prov.). Prey: Drepanaphis acerifoliae (Thos.) nymphs, 

 D. sp. nymphs and adult, Rhopalosiphum sp. nymphs. Aphis sp. nymph, Anuraphis sp. 

 nymphs, Myzocallis ? sp. nymph, Chaitophorus ? sp. nymph, Therioaphis sp. nymphs 

 and adults, Aphidini sp., Panaphidini sp. nymphs and adult, Aphidinae sp. nymph. 



Stignuis americanus Packard, 1867. Ent. Soc. Phila., Proc. 6: 386. 9,6. 



Stigmus lucidus Rohwer, 1909. Amer. Ent. Soc, Trans. 35: 102. 6. 



Stigmtis fratemus coloradensis Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 559. 9. 



Biology: Peckham and Peckham, 1898. Wis. Geol. Nat. Hist. Survey, Bui. 2: 44-45 (nest, prey, 

 parasite). — Krombein, 1954. Brooklyn Ent. Soc, Bui. 49: 6 (nest, prey). — Krombein, 1955. 

 Brooklyn Ent. Soc, Bui. 50: 16 (nest, prey). —Krombein, 1956. Brooklyn Ent. Soc, Bui. 51: 

 42. (prey). —Krombein, 1958. Biol. Soc. Wash., Proc. 71: 24 (nest, prey). —Krombein, 1961. 

 Brooklyn Ent. Soc, Bui. 56: 64-65 (nest, prey, life cycle). 

 aphidiperda Rohwer. Pa. to N. C. Ecology: Nests in peach twig. Prey: Aphis persicaeniger Sm. 



Stigmus aphidiperda Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 558. 9, 6. 

 fraternus Say. Mass. and N. H. to S. C, W. Va., Tenn., Mo. Ecology: Nests in twigs, old galls 

 and beetle borings in structural timber. Prey: Monellia sp. nymphs, Therioaphis sp. 

 nymphs, Aphididae spp. 

 Stigmus fraternus Say, 1824. hi Keating, Narr. Long's 2nd Exped., v. 2, p. 340. 

 Stigmus conestogorum Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 557. 9. 

 Stigmus fraternus raui Rohwer, 1923. Ent. Soc. Wash., Proc. 25: 100. 9, cJ. 



Biology: Packard, 1869. Guide Study Ins., p. 161 (nest). — Rau, 1928. Acad. Sci. St. Louis, 

 Trans. 25: 379-381. (nest, prey, life cycle). —Krombein, 1958. Biol. Soc. Wash., Proc. 71: 24 

 (nest, prey). 

 fulvicornis Rohwer. Miss. (Starksville). Ecology: Nesting in floors of porch and in house. Prey: 

 Aphididae sp. 

 Stigmus fulvicornis Rohwer, 1923. Wash. Acad. Sci., Jour. 13: 370. 9. 



Biology: Smith, 1923. Jour. Econ. Ent. 16: 553-554 (nest, prey). 

 hubbardi Rohwer. Colo., Utah, N. Mex., Ariz., Calif., Wash. Ecology: Nests in the shelf fungus 

 Polyporus. 

 Stigmus inordiyiatus hubbardi Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 559. 9, 6 . 



Biology: Rohwer, 1911. U. S. Natl. Mus., Proc 40: 559 (nest). 

 inordinatus inordinatus Fox. Mont., Colo, and N. Mex. west to B. C. and Calif. Ecology: Nests 

 in cavities or borings in twigs or stems of mulberry, peony, peach, raspberry and 

 elderberry, constructing a linear series of cells stored with 12-30 aphids per cell. 

 Parasite: Omalus variatus (Aar.), 0. glomeratus (Buyss.), 0. cressoni (Aar.). Prey: 

 Aphis frangulae Kalt. ?, Aphididae sp. 

 Stigmus inordinatus Fox, 1892. Amer. Ent. Soc, Trans. 19: 322. 9, S. 

 Stigmus fulvipes var. coquilletti Rohwer, 1911. U. S. Natl. Mus., Proc. 40: 559. 9, S. 

 Stigmus reticulatus Mickel, 1918 (1917). Nebr. Univ., Studies 17: 330. 9. 



Taxonomy: Evans, 1958. Amer. Ent. Soc, Trans. 84: 134-135, figs. 68, 69 (larva). 



