AMERICAN HYMENOPTERA. 35 



abdomen minutely sculptured, shining^, anal horn or pornus long, broad at 

 base and gradually narrowed to tip, the sides irregularly serrate, the upper 

 surface depressed, smooth and impunctured ; ovipositor about as long as 

 abdomen. Length to tip of cornus, .95 inch. 



Hah. — Yaucouver's Island, (H. Edwards). Closely allied to cyaneus 

 Fab., but in that species the cornus is shorter, broader at ba.se and 

 more triangular in form, and the legs of a different color. 



Urocerus Behrensii.— 9 .— Black, opaque, with a slight tinge of blue; 

 wings hyaline, a band beneath base of stigma, bent towards base of wing, and 

 apical margin, fuscous; tarsi more or less brown-ferruginous; abdomen fer- 

 ruginous, basal plates, first segment and lateral margin of second and follow- 

 ing segments, black; cornus short, triangular, acute at tip and serrate at sides, 

 shaped somewhat as in Edwardsii BruUe. Length 1.25 inch. 



Hub. — California, (Behrens). 



Urocerus fulvus. — %. — Fulvous, thorax darker; cheeks pale yellow; 

 tips of mandibles and line behind ocelli fuscous; wings yellowish-hyaline, 

 nervures fulvous; cornus short, acutely triangular, sides serrated. Length 

 1.05 inch. 



Hah. — Colorado, Washington Territory, (Morrison, H. Edwards). 



Urocerus lUorrisoni. — J. — Form of caudatus Cress.; black, head and 

 thorax opaque, coarsely sculptured; a pale spot on smooth space on cheeks 

 behind summit of eyes, antennae beyond sixth or seventh joint, tibiae, tarsi and 

 abdomen, except basal plates and first segment, ferruginous; wings fuliginous, 

 darker towards base; knees and sometimes the basal third of the tibiae pale; 

 cornus as in caudatus ; ovipositor longer than the body, black. Length .75 — 

 1.16 inch; with ovipositor 1.20 — 2.10 inch. 



9 var. — Antennae, legs and abdomen entirely ferruginous. Length 1.10 — 

 1.20 inch. 



%. — Colored like 9> except that the antennae and legs are black, knees 

 and tips of tarsi more or less ferruginous; wings paler; abdomen sometimes 

 obfuscated at tip. Length .50 — .75 inch. 



Hah. — Colorado, Utah, Washington Territory, (Morrison). This 

 may prove to be a variety of caudatus Cress. 



The following descriptions, the originals of which are scattered 

 through different publications, and not included in Norton's descrip- 

 tive Catalogue, are added here to facilitate reference. 



Cinibex 9IacL.eayi Leach, Zool. Misc. No. 2; St. Farg. Mon. Tenth., 

 30. — " % • — Antennae luteous, four basal joints subfuscous; head and thorax 

 pale violaceous-black; abdomen luteous, disk and base violaceous-black, in- 

 cisures luteous; legs violaceous-black, tarsi luteous; wings hyaline, apex and 

 base of second radial cell fuscous." 



Hah. — San Domingo. 



