1934 ] 
A New American Myrmosid 
59 
This wasp crawled up on my hand as I was digging up 
a colony of the ant, Myrmica scabrinodis lobicornis var. 
fracticornis Emery. The colony was in moist loam under 
grass roots in a partly shaded situation. The larvae of the 
ants were disposed in several chambers scattered through 
the upper few inches of the soil. It seems possible that 
this species of Myrmosa parasitizes Myrmica and other 
ants. 
