224 THE CANADIAN ENTOMOLOGIST. 



number of oaks and other trees close by, their choice was for the beech, 

 to which both species were constantly arriving and inserting their long 

 ovipositors. At the close of each day I cut off, to the depth of six inches, 

 such portions of the stump as had been attacked, but failed to detect in 

 any of the cuttings either the burrow or larva of Tremex or other larva. 

 I also noticed that the wood as exposed by such clippings as I had made, 

 attracted the greatest number of these insects. I regard it therefore a 

 matter of considerable doubt if either the atrata or lunator commonly 

 deposit their ova in the body of wood-boring larvae, and it seems to me 

 that if these ichneumon larvae are carnivorous, they must possess the 

 power of boring in search for their food. I do not suppose that these 

 insects perform the great labor of inserting their long ovipositors upon the 

 merest chance of meeting with a larva, but rather that they deposit their 

 eggs at every insertion, my observations abundantly proving that they are 

 not governed by any instinct in the selection of particular spots, so far as 

 regards the presence of larvae. 



NOTES ON THE OCCURRENCE OF SOME SPECIES OF 



UROCERID^. 



BY W. HAGUE HARRINGTON, OTTAWA, ONT. 



Although my collections hitherto have been chiefly of Coleoptera, I 

 have, as opportunity offered, captured specimens in other orders, and 

 among those thus taken during the past season are representatives of a 

 few species of the Uroceridse. I wish now to record a few brief notes on 

 these — the more readily because so little regarding this group has been 

 published in the Entomologist. 



I. On the 25th of June last I captured upon a recently dead maple 

 tree, near my house, two rather small insects, of which the larger had its 

 ovipositor inserted in the bark. They proved to be two female specimens 

 of Xiphydria albkornis Harris. One was half an inch long, the other 

 five-eighths. 



