Ecological and Behavior Notes 21 



taken from a sumac twig, was found to contain not the 

 rightful owner but the parasite, Diamorus zabriskiei 

 Cress. [R. A. Cushman], which was fully developed and 

 occupied the entire space. 



Cerceris clypeata Dahlb. [S. A. Bohwer]. Taken at 

 Kimmswick, Mo., by sweeping the low grass at 5 p. m. on 

 July 17. 



Cerceris raui Roh. [S. A.Rohwer]. A male was found 

 feeding on buck-brush blossoms at Wesco, about a hun- 

 dred miles from the point from which it was described. 



Philanthus politus Say. [S. A. Rohwer]. Taken on 

 July 2, in an area of white sand at Silica, Mo., in com- 

 pany with several other Hymenoptera. 



Philanthus punctatus Say. [S. A. Rohwer]. Taken at 

 Hematite, Mo., as late in autumn as October 19, 1918. 



Crossocerus scutellatus Say. [S. A. Rohwer]. One in- 

 dividual of this species was seen to enter three holes in 

 a clay bank at Lake View, Kansas, July 27, 1916; then 

 it returned to the first one where it was captured. Another 

 was twice seen doing **the Higland fling** before its hole 

 in the bank; it would poise before the hole in humming- 

 bird fashion for many seconds and sometimes move from 

 side to side, and eventually dart away. I did not ascer- 

 tain if it was foraging in these holes or actually nesting 

 there. 



Crossocerus incavus Fox. [S. A. Rohwer]. This wasp 

 was found in the same clay bank as the above species. 

 One entered a hole in the bank, and despite the fact that 

 the tunnel went in for several inches it remained near 

 the entrance kicking out loose dirt, until it was captured. 



Xylocelia ater Mickel. [S. A. Rohwer]. At Lake View, 

 Kansas, on July 27 and 30, two were seen to enter crev- 

 ices in the dirt bank. 



Xylocelia spiniferus Mickel. [S. A. Rohwer]. Taken 

 at Creve Coeur Lake, Mo., October 7, 1916. 



Diodontus corusanigrens Roh. [S. A. Rohwer].* On 



♦This is a new species described from this material In Proc. U. S. Nat. Mua. 57 :27*, 

 1920. 



