1212 Hymenoptera in America North of Mexico 



Laelius nigripilosus Ashmead, 1893. U. S. Natl. Mus., Bui. 45: 52. 3, 9. 

 Bethylus constrictus Ashmead, 1893. U. S. Natl. Mus., Bui. 45: 53. 9. 

 Laelius ashmeadi Kieffer, 1908. In Wytsman, Gen. Ins., fasc. 76, p. 38. N. name. 

 Laelius fumipennis Brues, 1910. Wis. Nat. Hist. Soc, Bui. (Ser. 2) 8: 45. 9. 

 trogodermatis Ashmead. Que., N. Y., D. C, Va., Fla. Host: Trogoderma parabile Beal, T. 

 simplex Jayne, T. versicolor Creutz. 

 Laelius trogodermatis Ashmead, 1893. U. S. Natl. Mus., Bui. 45: 51. 6, 9. 



Biology: Howard, 1901. The Insect Book, pp. 34-36, fig. 18. — Krombein, 1955. Brooklyn Ent. 

 Soc, Bui. 50: 13-14. 

 utilis Cockerell. Ont., Mass., Md., D. C, Va., N. C. Host: Trogoderma versicolor Creutz.; 

 Bruchus brachialis Fahr.? 

 Laelius utilis Cockerell, 1920. Canad. Ent. 52: 34. 9. 

 voracis Muesebeck. D. C, Va.; India. Host: Anthrenus vorax (Waterh.). 

 Laelius voracis Muesebeck, 1939. Biol. Soc. Wash., Proc. 52: 172. 9 , d . 



Biology: Back, 1940. Ent. Soc. Wash., Proc. 42: 110-113, 1 pi. — Kurian, 1954. Agra Univ., 

 Jour. Res. (Sci.) 3: 422, figs. 9-13. 



Tribe CEPHALONOMIINI 



Genus PLASTANOXUS Kieffer 



Plastanoxus Kieffer, 1905. hi Andre, Spec. Hym. Eur. Alg., v. 9, p. 244. 



Type-species: Ayioxus chittendenii Ashmead. Desig. by Gahan, 1931. 



These tiny wasps are parasitic on coleopterous larvae. 



Revision: Gahan, 1931. Wash. Acad. Sci., Jour. 21: 213-218, figs. 1-3. 



Taxonomy: Evans, 1964. Mus. Compar. Zool., Bui. 132: 151-152 (key to species). 

 chittendenii (Ashmead). Transcontinental in southern Canada and U. S.; adventive in England. 

 Host: Cis fuscipes Mellie? 

 Anoxus Chittendenii Ashmead, 1893. U. S. Natl. Mus., Bui. 45: 68. 6. 

 incompletus Evans. Ariz. (Mesa). 



Plasta7ioxus incompletus Evans, 1964. Mus. Compar. Zool., Bui. 132: 152. 9. 

 laevis (Ashmead). D. C; ?Brazil. 



Anoxus laevis Ashmead, 1893. U. S. Natl. Mus., Bui. 45: 68. 9. 

 westwoodi (Kieffer). D. C, Ga.; probably cosmopolitan. Host: Laemophloeus pusillus (Schonh.). 

 Cephalonomia westwoodi Kieffer, 1914. Das Tierreich, Lief. 41, p. 248. <J, 9. 

 Plastanoxus kiefferi Gahan, 1931. Wash. Acad. Sci., Jour. 21: 217. 9, d (? Lapsus for 

 westwoodi.) 



Genus CEPHALONOMIA Westwood 



Cephalonomia Westwood, 1853. Mag. Nat. Hist. 6: 420. 



Type-species: Cephalonomia formicifomis Westwood. Monotypic. 

 Holopedina Foerster, 1850. Naturh. Ver. Rheinlande Verb. 7: 502. 



Type-species: Holopedina polypori Foerster. Monotypic. 

 Cephalo7iomia subg. Cephaloderma Hoffer, 1936. Festchr. Embrik Strand, v. 1, p. 459. 



Type-species: Cephalonomia (Cephalodenna) strandi Hoffer. Monotypic. 



So far as known these tiny wasps parasitize the larvae or pupae of small Coleoptera occurring 

 in cryptic situations. One group attacks pests of stored grains, another parasitizes Ciidae occur- 

 ring in fungi, and the third attacks bark beetles. Four types of species may be distinguished 

 based on development of the wings in both sexes: One in which both sexes are macropterous; 

 one in which the males are macropterous, the females macropterous or brachypterous; a third in 

 which the males are macropterous or apterous and the females apterous; and the last in which 

 the males are macropterous or apterous, the females macropterous, micropterous or apterous. 



Biology: Evans, 1964. Mus. Compar. Zool., Bui. 132: 158-159. 



