14 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
Caeruleus is at most a variety of arcolatus. It differs only 
by having the posterior tarsi beyond the middle of the meta- 
tarsus red, darker on the last segment, and by having only 
slightly fuscous wings. Ediwardsu shows quite as much varia- 
tion in wing color. 
Key to THE Races oF SIREX AREOLATUS 
Wings dark violaceous; legs entirely black or blue-black. 
Race areolatus (Cresson) Kirby 
Wings only slightly smoky; posterior tarsi beyond the middle of 
the metatarsus red, apical segment darker. 
Race caeruleus (Cresson) Kirby 
Race areolatus (Cresson) Kirby 
(Fig. 22 
1867 Urocerus areolatus Cresson, 2. Cat. of a small coll. Hym. made 
in N. Mex. < Trans. Amer. ent. soc.; v. 1; p. 375. 
1874 Sirex gracilis Westwood, ?. Thes. ent. oxon.; p. 114; pl. 21, f. 4. 
Known from the mountains of Arizona and New Mexico, 
Colorado and Northern California. 
Race caeruleus (Cresson) Kirby 
1880 Urocerus caeruleus Cresson, 2. Deser. of new N. A. Hym. in coll. 
Am. Ent. Soc. < Trans. Amer. ent. soc.; v. 8: p. 34. 
1898b Paururus arcolatus Konow, 6 ¢@. Syst. u. krit. Bearb. d. Sirie.- 
Trib. Siricini. < Wien. ent. Zeit.; v.17: p. 90. 
Known only from Vancouver Island. 
Sirex juvencus race cyaneus Fabricius 
(Fig. 23) 
1781 Sirex cyaneus Fabricius, 2. Spec. msec.; v. 1: p. 419. 
1837 Sirex duplex Shuckard, @ ¢. Descr. of an. sp. of Sirex discoy- 
ered to attack spruce fir. < Mag. nat. hist.; (n.s.) v. 1: p. 630. 
1841 Urocerus nitidus Harris. Rep. ms. Mass. inj. to veg.; p. 391. 
1866 Sirex varipes Walker, 2. In The Naturalist in Vancouver Island 
and British Columbia. By J. K. Lord; v. 2: p. 342. 
1882 Sirex abboti Kirby, é. List. Hym. Brit. mus.; v. 1: p. 378; pl. 
15; £: 8. 
1882 Sirex hirsutus Kirby, 6. Loc. cit.; p. 380; pl. 15, f. 6. 
