No. 22.] 



HYMENOPTERA OF CONNECTICUT. 



171 



S. edwardsii (Brulle). Urocerns edzvardsii Brulle. Howard, 

 Insect Book, PI. xiii, Fig. 3. 



S. cyaneus (Fabricius). Urocerus cyaneus Fabricius. How- 

 ard, Insect Book, PL xiii, Fig. 12. Larva bores in spruce and fir. 

 Connecticut (E. N..) 



S. nigricornus (Fabricius). Urocerus nigricornus Fabricius. 

 Howard, Insect Book, PI. xii, Fig. 21. 



Urocerus Geoffroy. 



Key to Species. 



1. Abdomen entirely black; body black, with antennae more or 

 less at middle, a large spot behind each eye, a spot on 

 each side of the seventh abdominal segment, and basal half 

 of tibia? and tarsi, white; wings strongly infuscated. 

 Length 27 mm albicornis 



Abdomen wholly or in part yellow or rufous 2 



2. Wings yellowish hyaline; body black, with antennae yellow, 

 or yellow at base and brownish toward tip, sometimes 

 black in male; tibiae and tarsi brown or yellow, poste- 

 rior tibiae and tarsi black in male; basal plates, and ab- 

 dominal segments one to seven more or less yellow. 

 Length 35 mm flavicornis 



Wings strongly infuscated or violaceous; body black, with 

 antennae more or less at apex, and basal half of posterior 

 tibiae and the metatarsi, white; abdomen usually with first 

 and third or fourth apical segments reddish yellow, or at 

 times with entire abdomen reddish yellow. Length 20 mm. 



cressoni 



U. albicornis Fabricius. Howard, Insect Book, PI. xii, Fig. 

 24. Larva bores in spruce, hemlock, and fir. Connecticut 

 (E. N.). 



U. flavicornis Fabricius. Urocerus abdominalis Harris. 

 Howard, Insect Book, PL xiii, Figs. 17 and 24. Connecticut, 

 (E. N.) ; Hamden, 15 June, 191 1 (A. B. C). 



U. cressoni Norton. 



Xeris Costa. 

 X. caudata (Cresson). Urocerus caudatus Cresson. How- 

 ard, Insect Book, PL xiii, Fig. 29; and PL xiv, Fig. 36. 



Body black, with a spot behind the eyes and the collar more 

 or less, white ; the legs entirely obscure, luteous or brownish ; the 

 ovipositor reddish brown ; wings subhyaline, more or less stained 

 with fuscous. Length 23 mm. 



