358 EDWARD NORTON. 



and thorax greenish blue, of abdomen blue or violet ; the whole 

 body, except abdomen, rather closely covered with blackish hair; anal 

 mucro lengthened, pointed, not shouldered at base, but diminishing 

 equally in size; edges serrate, surface rugose; ovipositor nearly or 

 quite the length of abdomen including mucro; base of ovipositor ferru- 

 ginous; legs yellowish ferruginous ; their coxae and trochanters blue ; 

 wings hyaline, obscure at apex, nerves yellowish; second brachial cell 

 with complete cross nervure. % . The male has the antennae 18-jointed ; 

 the abdomen ferruginous, with a violet reflection, except the two or 

 three basal segments, which are cyaneous; the hinder femora yellow 

 ferruginous, but their tibiae and tarsi cyaneous, with the two apical 

 joints rufous; the anal mucro shorter, but presenting the same general 

 shape, seen from beneath ; wings as in female. 



Var. — A specimen from Canada has four inner under wing cells. 



N. H., Conn., N. Y., Colorado, Chilyunk Depot, Wash. Territory. 

 (Smiths, Inst.). • Europe. 



This may be considered as the American representative of [/roccrux 

 jnvencns of Europe, if it is not actually the same species. Mr. Shuckard 

 however, (Mag. Nat. Hist. New. Ser. i, 18o7, 6oO) thinks it a separate 

 species, because in the U. cj/aneiia the terminal mucro in both sexes is 

 more acuminate, and the ovipositor of the female longer; because it 

 inhabits in plantations side by side, only the American spruce fir 

 (Pinus nigra), while the time of its coming forth is in May and June, 

 after which it is rarely found. The jnvencus attacks only the Scotch 

 fir (Pinus sylvestris), and appears toward the end of July and never 

 earlier. Mr. Ingpen ( J'/"a/is. Ent. Soc. Lond. ii, 1838, p. Ixxxvii) 

 speaks of immense numbers of Sirex duplex^ being bred from lumber 

 which is supposed to have come from Canada, and gives remarks at 

 length on the habit of the insect. Mr. Shuckard names it Sirex du- 

 plex, on the ground that Fabricius description is not fully determinate, 

 and yet it seems hardly possible, after referring to the original descrip- 

 tion, to consider this anything else, as there is no other American spe- 

 cies at all like it. 



4. TTrocerus areolatas. 



Urocerus arcolatus, Cresson, Trans. Am. Ent. Soc. i, 375, 1, 9 • 

 " 9 . — Black, with a bluish-green reflection ; head clothed ■sf ith black 

 hairs ; vertex with large, deep, confluent punctures, and three rather 

 deep, longitudinal furrows; the surface around and about the ocelli 

 rugose; cheeks polished, sparsely punctured ; clypeus longitudinally 

 striated ; antennae black, shining, punctured, as long as the head and 



