1276 Hymenoptera in America North of Mexico 



peregrinatrix (Krombein). Alta., Ariz., Tex. 



Mijnnosa (Myrmosula) peregrinatrix Krombein, 1946. Ent. Soc. Wash., Proc. 48: 247. 9. 



rufiventris Blake. Nev., Oreg. 



Myrmosa rufiventris Blake, 1879. Amer. Ent. Soc, Trans. 7: 254. S. 

 Mutilla erythrogastra Dalla Torre, 1897. Cat. Hym., v. 8, p. 36. N. name for Mymiosa 

 rufiventris Blake, not Mutilla rufiventris Klug nor M. rufiventris Smith. 



Taxonomy: Krombein, 1940. Amer. Ent. Soc, Trans. 65: 459-460. 6. 

 rutilans (Blake). Calif. Host: No7nadopsis scutellaris (Fwlr.) 



Mutilla rutilans Blake, 1879. Amer. Ent. Soc, Trans. 7: 248. 9. 



Taxonomy: Krombein, 1940. Amer. Ent. Soc, Trans. 65: 461-462, fig. 12. 9. 



Family SIEROLOMORPHIDAE 



This is a primitive scolioid group whose closest relationship appears to be with the Tiphiidae. 

 The family is known from the single genus Sierolomorpha which has six New World species 

 ranging from North America south to Panama, one possibly adventive species in Hawaii, and 

 two Old World species from North China and Tadzhikistan. 



There is no information on host relationships, but the lack of a tarsal pecten in Sierolomorpha 

 females suggests that they are not fossorial in habit. 



Revision: Evans, 1961. Breviora, No. 140, 12 pp., 6 figs. 



Taxonomy: Melander and Erues, 1932. Mus. Compar. Zool. Bui. 73: 500. —Schuster, 1949. 

 Ent. Amer. (n. s.) 29: 124-125. 



Genus SIEROLOMORPHA Ashmead 



Sierolomorpha Ashmead, 1903. Canad. Ent. 35: 42. 



Type-species: Sierola (?) ambigua Ashmead. Orig. desig. 

 apache Evans. Ariz. 



Sierolomorpha apache Evans, 1961. Breviora, No. 140, p. 5, fig. 6. S- 

 bicolor Evans. Ariz. 



Sierolomorpha bicolor Evans, 1961. Breviora, No. 140, p. 4, fig. 5. 9, i. 

 brevicornis Evans. S. C. (Greenville). 



Sierolomorpha breviconiis Evans, 1961. Breviora, No. 140, p. 8, fig. 3. S. 

 canadensis (Provancher). Alta., Ont. and Mass. south to Ariz., Tex. and Fla. 



Photopsis Ca^iadensis Provancher, 1888. Addit. Corr. Faune Ent. Canada Hym., p. 410. 6. 

 Secondary homonym in Mutilla. 



Sierola^ ambigua Ashmead, 1893. U. S. Natl. Mus., Bui. 45: 56. 



Mutilla tertia Dalla Torre. 1897. Cat. Hym., v. 8, p. 91. N. name. 

 nigreseens Evans. Yukon, Alta. and Sask. south to Calif., Ariz, and Colo. 



Sierolomorpha nigreseens Evans, 1961. Breviora, No. 140, p. 9, fig. 1. i, 9. 

 similis Evans. Conn, south to Ga., W. Va., Kans. 



Sierolomorpha similis Evans, 1961. Breviora, No. 140, p. 6, fig. A. S, 9. 



Family MUTILLIDAE 



Females are entirely wingless and have a greatly modified thorax. Males are normally fully 

 winged, but are brachypterous or apterous in a few species. Some females are called cowkillers 

 or mulekillers because of their size and painful sting, or velvet ants because of the appearance of 

 the dense pile covering the body. 



Hosts are known for very few of the North American species. The stages of host attacked are 

 limited to diapausing larvae or pupae. Most recorded North American hosts are wasps or bees 

 which nest in the soil, in borings in wood or which build mud or resin cells or paper nests. How- 

 ever, there is one authenticated record of coleopterous pupae as a host. ExtraHmital genera have 

 been recorded as parasitizing Lepidoptera, Coleoptera and Diptera, as well as aculeate 

 Hymenoptera. 



Brothers' important contribution on phylogeny of the Mutillidae was received too late to adopt 



