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, Ijjsect Book, PI. xiv, 

 Fig. 34. Larva bores in white birch. 



'iX. tibialis Say. 

 X. attenuata Norton. Larva bores in birch. Connecticut 

 (W. H. P.). 



°X. erythrogastra Ashmead. 



Konowia Brauns. 



°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 wnngs, 

 white. Length 9 mm. 



SIRICID^. 

 Key to Subfamilies. 



Measured on vein M, free part of M2 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^ p. 169 



Measured on vein M, free part of M2 is opposite the radial 

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

 than the free part of M4; antennae thickened at middle, 

 never with more than fourteen segments; anal cerci want- 

 ing in male Tremecin.^ p. 172 



SlRICIN^. 



Key to Genera. 



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

 spear-shaped; front wings with free part of Cus usually 



