JOURNAL OF ENTOMOLOGY AND ZOOLOGY 21 



could be studied. The following j'ear (June 7-23, 1911) he took 

 four females and three males at the same locality. They were 

 nil almormally small, measuriui^' from 18-20 mm. ( 9 ) and 12-17 

 mm. ( <5 ), while the female collected the previous autumn meas- 

 ured 33 mm. 



Urocenis cre.'isnjii Norton 



There seem to be three color varieties of this species, most 

 distinct in the female. 



Table to the Varieties of Urocerus cressoni 



Abdomen entirely red; wings dark fuliginous. unicolor n. var. 



Basal six dorsal segments of the abdomen brown. cressoni Norton 



Abdomen red, with a black band occupying the third, fourth, and 



fifth dorsal segments (sometimes less.) tricolor Provancher 



These varieties do not represent geographical distinctions. 

 Distribution: Nova Scotia and Ontario south to Georgia. 



Variety cressoni Norton 



1864 Urocerus cressoni Norton, 9 . Notes on Tenthred. with deser. of 

 n. sp. in coll. of the ent soc. <Proe. Ent. see. Phila. ; v. 3 : p. 16. 



The male differs from the female (see descrijition under 

 variety unicolor) by the legs being entirely brownish black. 



Variety tricolor Provancher 



1869 Urocerus tricolor, Frovaneher, ?. Descr. d'un nouv. Hym. <Nat. 



eanad. ; v. 1 : p. 17. 



1870 Urocerus tricolor Provancher, $ . Nat. eanad.; v. 2 : p. 77 ; f. 10. 

 1S7-1: Sires dimidiatus Westwood, $. Thes. ent. oxon. ; p. 115; pi. 21, 



f. 5. 

 1901 Sirex fiskei Ashmead, ? . Descr. of four new horn-tails. <Can. 

 ent. ; V. 36 ; p. 63. 



I have seen the types of fiskei Ashmead, and find no reason 

 for thinking that species different from tricolor. In one female 

 the legs are entirely black except the base of the posterior tibiffi 

 and metatarsi, and the extreme base of the middle metatarsi. 

 In other specimens the legs are as in unicolor. 



