JOURNAL OF ENTOMOLOGY AND ZOOLOGY Dill 
could be studied. The following year (June 7-23, 1911) he took 
four females and three males at the same locality. They were 
all abnormally small, measuring from 18-20 mm. (¢) and 12-17 
mm. (2), while the female collected the previous autumn meas- 
ured 33 mm. 
Urocerus cressoni 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. cresson’ 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, 2. Notes on Tenthred. with deser. of 
n. sp. in coll. of the ent soc. < Proc. Ent. soc. Phila.; v. 3: p. 16. 
The male differs from the female (see description under 
variety wnicolor) by the legs being entirely brownish black. 
Variety tricolor Provancher 
1869 Urocerus tricolor, Provancher, 2. Desecr. d’un nouy. Hym. <Nat. 
canad.:; vy: li: sp: 17. 
1870 Urocerus tricolor Provancher, ¢. Nat. canad.; v. 2: p. 77; f. 10. 
1874 Sirex dimidiatus Westwood, @. Thes. ent. oxon.; p. 115; pl. 21, 
f. 5. 
1904 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 tibiz 
and metatarsi, and the extreme base of the middle metatarsi. 
In other specimens the legs are as in wiicolor. 
