oo 



Trans. Acad, of St. Louis 



July fi, 191S, an ckler stem was taken witli tliis adult 

 wasp within; in IfMJ) five wasps omcri^od Ix'twccn March 

 31 and April 14. This indicates but ono generation a 

 year. 



Didincis tr.ra)ii(s Cress. fS. A. Rohwcr]. On October 

 <1, 1 !»](!, about a dozen of these were seen walkinir about 

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

 killinu: time. 



Triipoxfilon nihrocinctum Pack. fS. 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 {trichri/sis) parvula 

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

 for the enormous size of the second cell. 



Trifpoxylon johnsoni Yo\. [S. A. Rohwer]. This nnl- 

 bodied Trypoxylon was this time found occupying a hole 

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

 ui)turned tree. The burrow was onl\* an inch deep and 

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

 have previously found it in twigs. 



Trypoxijlon friyidum Sm. [S. A. l^ohwer]. A di'ad 

 male found in the stem of a sumac. 



Trypoxylon clavatum Sm. IS. A. Rohwer]. This 

 emerged in June 1920 from a Polistcs paper nest with 

 mud plugs taken at Meramec Highlands October (5, l!ni>. 



Chlor'wn ichncumoneum Linn. Feeding upon flowers of 

 Aster muUiflorn, Octoltcr (i, 191!), and on buck-brush 

 blossoms at Wesco, July 30, 1920. 



Chlor'iou cyaneum Dahl. Found on August 14, 1919, 

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

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



