SPHECIDAE 397 



Tribe PEMPHREDONINI 



Taxonomy: Evans, 1958a, loc. cit. supra, pp. 126-136, figs. 49-57, 60-69 

 (larvae). — Evans, 1959a, loc. cit. supra, pp. 167-168 (larvae). 



Genus XYLOCELIA Rohwer, pp. 962-964 



atra Mickel. Pa. 



franclemonti Krombein. Pa., Md. 



Taxonomy: Evans, 1958a, loc. cit. supra, p. 133, figs. 65, 66 (larva). 



melathoracica Mickel. Ala. 



occidentalis (Fox). Nests in large colonies in ground. Prey: Aphis sp., 

 Myzus persicae Sulz. (?), Macrosiphum (Acyrthosiphon) sp., 

 Rhopalosiphum sp. 

 Biology: Powell, 1964. Wasmann Jour. Biol. 21: 155-176. 



virglniana Rohwer. Md. Prey: Nymphs of Prociphilus tesselatus (Fitch). 



Nests in ground. 

 Biology: Krombein, 1958. Biol. Soc. Wash. Proc. 71: 22-24. — Krombein, 



1963. Ent. Soc. Wash. Proc. 65: 264. 

 Taxonomy: Evans, 1958a, loc. cit. supra, p. 133, fig. 67 (larva). 



Genus PULVERRO Pate, pp. 964-965 

 mcscalero Pate. Tex. 



PEMPHREDON subgenus PEMPHREDON Latreille, pp. 965-966 



concolor Say. 



Taxonomy: Evans, 1958a, loc. cit. supra, pp. 130-131, fig. 56 (larva). 



PEMPHREDON subgenus CEMONUS Panzer, p. 966 



giffardi (Rohwer). Nev. 



Taxonomy: Evans, 1958a, loc. cit. supra, p. 129, fig. 57 (larva). 



harbecki Rohwer. Md., Va. Nests in boring in sumac pith. Prey: Rhopalo- 

 siphum rhois Mon. 

 Biology: Krombein, 1960. Ent. News 71: 34. 



*lethifer form littoralis Wagner. Ont. south to Fla., Pa. west to 111., Colo., 

 Utah, Wash., Calif. Introduced from Europe. Nests in soft pith 

 of roses, berries, sumac, hibiscus. Prey: Nymphs of Aphis sp., 

 nymphs and adults of Chaitophorus populicola patchae H. R. L. 



Peinphredon (Diphlebus) littoralis Wagner, 1918. Deutsch. Ent. Ztschr., 

 p. 143. 9, $. 



Taxonomy: Krombein, 1959. Brooklyn Ent. Soc. Bui. 54: 95-96 (as 

 lethifer lethifer (Shuckard)). — Evans, 1964, loc. cit. supra, pp. 

 246-248, figs. 23-25 (larva). 



Biology: Krombein, 1960. Ent. News 71: 34-35.— Krombein, 1964. Biol. 

 Soc. Wash. Proc. 77: 99-100, fig. 17.— Thomas, 1964. Mich. Acad. 

 Sci., Arts and Letters, Papers 49: 199-201. 



tenax Fox. 



Taxonomy: Evans, 1958a, loc. cit. supra, pp. 128-129, figs. 49-55 (larva). 



STIGMUS subgenus STIGMUS Panzer, pp. 966-967 



atnericanus Packard. Md. Prey: Therioaphis sp. 



Biology: Krombein, 1958. Biol. Soc. Wash. Proc. 71: 24. — Krombein, 

 1961. Brooklyn Ent. Soc. Bui. 56: 64-65. 



fraternus Say. Prey: Nymphs of Therioaphis sp. and Monellia sp. 



inordinatus inordinatus Fox. Nests in pith of mulberry twigs and peony 



stems. Prey: Aphis frangulae Kalt. (?). 

 Taxonomy: Evans, 1958a, loc. cit. supra, pp. 134-135, figs. 68, 69 (larva). 

 Biology: Wasbauer and Simonds, 1964. Pan-Pacific Ent. 40: 114-116, 



1 fig. 



