240 
Psyche 
[December 
We may conclude from this that Megarhyssa is not as well 
equipped with wonderfully mysterious instincts for prey as 
some students would have us believe. In fact I once found 
this insect ovipositing in the burrow of a Buprestid ! 
Trees Attacked 
Naturally Megarhyssa lives in trees most abundantly 
supplied with specimens of Tremex. In this region these 
seem to be almost exclusively soft maples (Acer sacchari- 
num) . The only other trees troubled to any extent are elms. 
The maples, probably because of the softness of the wood, 
are especially susceptible to insect attacks. 
Literature Cited 
Marsham, T. 1794. Observations on the economy of Ich- 
neumon manifestor. Linn. Soc., Trans., 3. 
Riley, C. V. 1888. Habits of Thalessa and Tremex. Insect 
Life, 1. 
