AMERICAN HYMENOPTERA. 51 



of this anterior or subcostal cell does not emit a branch near its apex, so that 

 the small incomplete discoidal cell seen in fulvocincta is here wanting. Length 

 lOJ lines." 



Hab. — North America. (Mus. Oxford University). 



Urocerus gracilis Westwood (Sirex), Thesaurus Ent. Oxon. 114, pi. 21, 

 fig. 4. — "9. — Elongate-cylindrical, bluish-black, finely punctured, abdomen 

 purple, the last segment narrowed to apex and serrate; ovipositor half the 

 length of abdomen; antennae long, slender, black, twenty-one-joiuted, almost 

 attaining the middle of the abdomen; legs slender, black; wings blackish, 

 tinged with purple; abdomen rather more than twice the length of head and 

 thorax; the portion of the ovipositor which extends beyond the serrated apex 

 of the abdomen equals half the length of the whole abdomen, to which also 

 the wings are equal in length ; the vein which closes the first submarginal cell 

 forms a regular curve with that which closes the hind part of the extremity 

 of the long subcostal cell; the vein which closes the hind margin of the cell 

 emits a small branch near its apex, forming a small incomplete discoidal cell. 

 Length 12 lines; of ovipositor beyond apex of abdomen, 4 lines." 



Hab. — North America. (Mus. Oxford University). 



Urocerus tricolor Provancher, Nat. Can. i, 17; iii, 77; x, 229, fig. 5. — 

 "9- — Length 1.25 inch. — Black; a spot on vertex behind eyes, eight terminal 

 joints of antennse, knees, base of all the tibise, the first two segments of ab- 

 domen and the last comprising the cornus, yellow; head and prothorax hairy, 

 coarsely punctured ; legs black, knees, base of four anterior tibise, base of first 

 and last joints of their tarsi, posterior tibiae except tips, first joint of their tarsi 

 except tips, and base of joints two and five, yellow; wings dark fuliginous, 

 with a violaceous reflection, nervures black; abdomen with the second, apical 

 middle of first, and the last segment with cornus, yellow; segments three, 

 four and part of five violaceous-black, the remainder velvety red; cornus 

 rather long, lanceolate, yellow; ovipositor yellow, the valves with a black line 

 on sides, about a third of the length of the abdomen. 



"%. — Black; two spots on vertex behind eyes, apical half of antennse, and 

 the abdomen, yellow, more or less reddish; legs entirely black; base and ex- 

 tremity of abdomen brown; wings smoky, paler than in 9'" 



Hab. — Canada. (Coll. Provancher). This is probably a variety 

 of Cressoni Norton. 



Additional new species. 

 Cimbex pacifica. — 9 • — Large, brown-ferruginous ; cheeks polished, face 

 thickly clothed with short fuscous pubescence; mandibles brown; antennse 

 fulvous, shading into yellow at tip; prothorax and tegulse, yellow-ferruginous ; 

 mesothorax, except sides of anterior lobe, and pectus, blackish-brown; pleura 

 smooth and shining; wings luteo-hyaline, the apical margin and a cloud be- 

 fore the stigma fuscous, costal nerve ferruginous; legs luteo-ferruginous, a fus- 

 cous line on posterior femora above, tarsi yellow ; abdomen above straw colored, 

 first segment dark brown edged posteriorly with luteous; venter blackish, apical 

 segment and ovipositor luteous. Length .95 inch. 

 Hab. — Washington Territory, (Morrison). 



