22 Trans. Acad, of St. Louis 



July 6, 1918, an elder stem was taken with this adult 

 wasp within ; in 1919 five wasps emerged between March 

 31 and April 14. This indicates but one generation a 

 year. 



Didineis texanus Cress. [S. A. Rohwer]. On October 

 6, 1916, about a dozen of these were seen walking about 

 on the loose soil at the base of a clay bank, apparently 

 killing time. 



Trypoxylon rubrocinctunn Pack. [S. A. Rohwer]. An 

 elder twig contained a gallery three inches long and one- 

 eighth inch in diameter. The lowermost cell of this was 

 one-half inch long and contained the black cocoon from 

 which this wasp emerged during the middle of July. A 

 very thin partition of mud separated this from the next 

 cell, which was one and three-fourths inches in length. 

 Next was another partition of mud, and beyond this was 

 the old case of a cuckoo-bee, Chrysis (trichrysis) parvula 

 Fab. [S. A. Rohwer]. No explanation has been found 

 for the enormous size of the second cell. 



Trypoxylon johnsoni Fox. [S. A. Rohwer]. This red- 

 bodied Trypoxylon was this time found occupying a hole 

 in a mass of soil which was clinging to the roots of an 

 upturned tree. The burrow was only an inch deep and 

 wide enough to accommodate only the wasp's body. We 

 have previously found it in twigs. 



Trypoxylon frigidum Sm. [S. A. Rohwer]. A dead 

 male found in the stem of a sumac. 



Trypoxylon clavatwm Sm. [S. A. Rohwer]. This 

 emerged in June 1920 from a Polistes paper nest with 

 mud plugs taken at Meramec Highlands October 6, 1919. 



Chlorion ichneumonevm Linn. Feeding upon flowers of 

 Aster multiflora, October 6, 1919, and on buck-brush 

 blossoms at Wesco, July 30, 1920. 



Chlorion cyanevm Dahl. Found on August 14, 1919, 

 carrying a cricket, Gryllus assimilis Fab. [A. N. Cau- 

 dell]. The cricket, at first quite helpless, slowly regained 



