JOURNAL OF ENTOMOLOGY AND ZOOLOGY 23 



BB. Abdomen entirely black. 



spectrum race caudata (Cresson) Konow 

 A A. Cornus not constricted at its liase, or very slightly so. [Alidoinen 

 except first dorsal segment red; legs black, the tarsi reddish.] 



macgillivraiji u. sp. 



MALES 



Abdomen mostly red. morrisoni (Cresson) Konow 



Abdomen black. spectrum race caudatus (Cresson) Konow 



Xeris spectrum (Linnaeus) Costa 



(Fig. 4) 



Kirby notes that caudata is closely allied to spectrum. They 

 are indeed so closely related as to be undoubtedly one species. 

 A careful examination of specimens of both species fails to dis- 

 close any very satisfactory characters to separate them even as 

 races. Konow does this as follows : 



Legs uniformly reddish yellow, in the $ the posterior legs black 

 at base ; S with black temples ; ovipositor longer than the 

 body. caudata (Cresson) Konow 



Tibiffi white at base, each temple with a yellowish white spot; $ 

 with posterior legs mostly black; ovipositor as long as the 

 body. spectrum (Linnteus) Costa 



Xeris spectrum race caudata (Cresson) Konow 

 (Figs. 11 and 28) 



1865b Urocenis caudatus Cres.son, 9. <'at. Hym. in coll. Am. ent. .soc. 



from Col. Terr. < Proc. Ent. soc. Phila. ; v. 4 : p. 247. 

 1869 Vrocerus caudatus Norton, S § . Cat. descr. Tenthred. and Uroc. 



N. A. < Trans. Amer. ent. soc. ; v. 2 : p. 363. 

 1874 ,s'//-('.r melancholicus Westwood, S. Tlies. ent. oxon. ; p. 116; pi. 



21, f. 8. 



Distribution: Inhabits the Hitdsonian and Canadian life 

 zones, where it is a common insect, having been found from 

 Alaska, Keewatin, and Nova Scotia south along the Pacific 

 Coast to northern California, and in the Eocky Mountains to 

 Colorado, where it occurs at high altitudes. In the east it has 

 been taken in the White Mountains, and may be expected in 

 the Adiroudacks. 



