No. 22.] HYMENOPTERA OF CONNECTICUT. 169 



X. maculata Say. Howard, Insect Book, PI. xii, Fig. 25. 

 Larva bores in maple. Connecticut (E. N.) ; Wallingford, I, 25 

 June, 1910, (D. J. Caffrey). 



X. canadensis Provancher. Howard, Insect Book, PI. xiv, 

 Fig. 34. Larva bores in white birch. 

 X. tibialis Say. 



X. attenuata Norton. Larva bores in birch. Connecticut 

 (W. H. P.). 

 X. erythrogastra Ashmead. 



Konowia Brauns. 



C K. basalis (Say). Xiphydria basalis Say. 

 Abdomen black, with the two basal segments honey-yellow, 

 more or less mixed with black; legs, except the posterior tibiae 

 and tarsi, honey-yellow; wings hyaline. Length 8-9 mm. 



K. walshii (Westwood). Xiphydria walshii Westwood. 

 Abdomen piceous, with the middle segments margined at sides 

 with white ; legs fulvous, with the tips of the tarsi fuscous ; 

 antennae fuscous, with the bases luteous ; head black, with two 

 spots behind the ocelli and a line on the lower and posterior or- 

 bits, white ; collar narrowly, the sides and under surface of the 

 prothorax, and two spots on the mesonotum between the wings, 

 white. Length 9 mm. 



SIRICIDiE. 



Key to Subfamilies. 



Measured on vein M, free part of M is midway or much 

 nearer to the free part of R than to the radial cross-vein; 

 antennae filiform, with at least seventeen segments: anal 

 cerci present in male Siricin^e p. 169 



Measured on vein M, free part of M a is opposite the radial 

 cross-vein, or always much nearer to the radial cross-vein 

 than the free part of M 4 ; antennae thickened at middle, 

 never with more than fourteen segments; anal cerci want- 

 ing in male Tremecin,e p. 172 



SlRlCIN^E. 



Key to Genera. 



I. Cornus at apex of abdomen of female constricted at base, 

 spear-shaped; front wings with free part of Cu 2 usually 



