JOURNAL OF ENTOMOLOGY AND ZOOLOGY ily 
Urocerus Geoffroy 
Urocerus, gen. uroceri, M. <otpa=tail + Képas =horn derivatives: urocer +- 
(Figs. 2, 5, 7, 26, and 29-33) 
<1758 Ichnewmon Linneus. < Syst. nat.; ed. 10, v. 1: p. 560. 
1761 Strex Linneus. Fauna suec; ed. 2: p. 396. 
1762 Urocerus Geoffroy. Hist. abreg. insec. de Paris; v. 2: p. 264. 
The type of the genus is Ichnewmon gigas Linneus. 
A Key to tor NortH AMERICAN SPECIES oF URocrrus 
A. Abdomen entirely black or blue-black. 
B. Wings somewhat smoky or yellow; antenne, except the base 
and sometimes the apex, cheeks, sometimes lateral spots on 
the last abdominal segment, base of tibiz and tarsi white 
or yellow. 
C. Wings somewhat smoky; antenne except the apex and 
the basal two or three segments, cheeks, sometimes 
lateral spots on the abdomen, the base of the tibix 
and tarsi, white. 2? albicornis (Fabricius) Harris 
CC. Wings golden yellow; antennx except the basal segment 
and all other markings yellow. 
2 californicus Norton 
BB. Wings brown-black; antenne from the eleventh segment to 
the apex white; cornus reddish yellow. 
2? tarodiu (Ashmead) 
AA. Abdomen partly red or yellow, or brownish. 
B. Wings subhyaline. 
C. Antenne, tibie, and tarsi, second, seventh, eighth, and 
sometimes the first abdominal segments more or less 
yellow, the remainder black; wings yellow toward the 
base and costal margin. 
9 flavicornis (Fabricius) Provancher 
CC. Antenne brown, yellowish at the base; tibix and tarsi 
except the anterior, brown, their bases yellow; third, 
fourth, fifth, and sixth, abdominal segments yellow, 
the remainder black; wings clear, not yellow. 
é flavicornis (Fabricius) Provancher 
BB. Wings brown-black; the abdomen and more or less of thorax 
reddish or brownish yellow, the apex dusky or blackish. 
$ taxodui (Ashmead) 
