JOURNAL OF ENTOMOLOGY AND ZOOLOGY 17 



Uroceriis Geoffroy 



Urocerus, gen. uroceri, M. <ovpa = tail + K€pas = horn derivatives: urocer + 



(Figs. 2, 5, 7, 26, and 29-33) 



<175S Ichneumon Linnsus. < Syst. nat. ; ed. 10, v. 1 : p. 560. 



1761 Sirex Linna>us. Fauna suec ; ed. 2: p. 396. 



1762 Urocerus Geoffroy. Hist, abreg. insee. de Paris; v. 2: p. 264. 



Tlie type of the genus is Ichveiiiiioii gifjas Linna'us. 



A Key to the North American Species of Urocerus 

 A. AlKlomen entirely black or blue-black. 



B. Winjj.s soiiipwhat smoky or yellow; antenna>, except the base 

 and soiiietiincs the apex, cheeks, sonietimes lateral spots on 

 the last abdominal segnient, base of tibiae and tarsi white 

 or yellow. 



C. Wings somewhat smoky; antenna' except the apex and 

 the basal two or three segments, cheeks, sometimes 

 lateral spots on the abdomen, the base of the tibite 

 and tarsi, white. 2 albicornis (Fabricius) Harris 



CC. Wings golden yellow ; antenna- except the basal segment 

 and all other markings yellow. 



9 calif ornicus Norton 



BB. Wings brown-black; antenna' from the eleventh segment to 

 the apex white; cornus reddish yellow. 



9 ta.rodii (Ashmead) 



AA. Abdomen partly red or yellow, or brownish. 



B. Wings subhyaline. 



C. Antenna-, tibia>, 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. Antenna; brown, yellowish at the base; tibisij and tarsi 

 except the anterior, brown, their bases yellow; third, 

 fourth, fifth, and sixth, abdominal segments yellow, 

 the remainder black; wings clear, not yellow. 



S flavicornis (Fabricius) Provancher 



BB. Wings browu-black; the abdomen and more or less of thorax 

 reddish or brownish yellow, the apex dusky or blackish. 



3 taxodii (Ashmead) 



