22 .TOUBNAL OF ENTOMOLOGY AND ZOOLOGY 



Variety unicolor n. viir. 

 (Fig. 31) 



S.ij^^Head aud thorax black, except the temples, which are 

 creamy; antennae l)lacl\ at base, the apical fourteen segments 

 creamy. Wings fnliginons, with violaceous reflection; legs 

 bhick, tlie anterior tibi« and metatarsi narrowly creamy white 

 at tlic l)ase, tlie middle ones more broadly so, the posterior 

 til)iffi, metatarsi, following and ultimate tarsal segments creamy 

 white except at tip; base of third posterior tarsal segment and 

 claws creamy ; alidomen entirely red, opaque and slightly satiny 

 above, polished beh)w. The precornal basin is wide and short, 

 the al)domen less bluntly terminated, and the cornus less elon- 

 gate, and its neck less constricted than in taxodii; ovipositor 

 extending slightly more than the length of the cornus beyond 

 the tip of the latter. 



Distribution: Quebec (Joliette, July 9, type, 9). Mass. 

 (Saugus, August, 1!)U5, paratype, 9 ). 



Type in the author's collection and paratj^pe in the collection 

 of the American Entomological Society. 



Xeris Costa 

 (Figs. 4, 11, 28, 30, and 35) 



Xeris, gen. xeris, F. < Stpi'S = a kind of plant derivatives: xer + 



<1758 Ichneumon Linnaeus. Syst. naturae; ed. 10; v. 1: p. 560. 

 <1761 Sirex Linnanis. Fauna suec; ed. 2: p. 396. 

 <1762 Urocerus Geoffroy. Hist, abreg. insec. d. Paris ; v. 2 : p. 264. 

 189r) Xeris Costa subgenus. Frosp. Im. Ital. <Atti. d. r. Afad. d. sei. 

 fis. e mat. Napoli ; (2nd ser.) v. 7 : p. 295. 



As in Sirex the cheeks are white maculate, aud the cornus 

 contracted at base. The posterior lateral angles of the head 

 are sluirply carinate. The ovijiositor is usually longer than 

 tlie body. 



A Key to the North American Species of Xeris. 



FEMALES 



A. Cornus distinrtly constricted at its base. 

 ]i. Abdomen except first segment red. 



morrisoni (Cresson) Konow 



