18 Trcms. Acad, of St. Louis 



had probably been used previously by a Crdbro wasp. 

 Four inches below the top of the remaining cavity, this 

 Eumenid mother had laid a mud floor and inserted a mud 

 ceiling one-half inch above this, thus making only one 

 large cell in the twig. In lieu of making a cocoon, the 

 larva had varnished the walls of the room with some 

 substance which had hardened into a very thin, onion- 

 skin-like, white tissue. Nothing remained to indicate 

 what the food supply had been. Another individual 

 made its nest in the interstices of a corrugated cardboard 

 box in the laboratory. Others were seen on the flowers 

 of buck-brush on August 1, 1920. 



. Odynerus (Ancistrocerus) tigris Sauss. [S.A.Rohwer]. 

 Found on the screen door, carrying a caterpillar, at 

 Wickes, May 29, 1920. 



Odynerus (Ancistrocerus) capra Sauss. var. [S. A. 

 Rohwer]. Taken from blackberry blossoms, May 29, 

 1920. 



Odynerus (Stenodynerus) anormis Say. [S. A. Roh- 

 wer.] On flowers of buck-brush, August 1, 1920. 



Odynerus (Stenodynerus) pedestris Sauss. [S. A. Roh- 

 wer]. On buck-brush blossoms, Wesco, August 1, 1920. 



Alyson melleus Say. [S. A. Rohwer]. This was seen 

 on June 13, 1918, entering a hole in a bank. It was one 

 among many bee holes, so it might have been the wasp 's 

 own burrow or that of a bee. 



Nysson (Hyponysson) raui [S. A. Rohwer].* One was 

 seen on August 5 to enter the bee burrow of Calliopsis 

 nebrascensis Cfd. [J. C. Crawford]. 



Nysson sp. [S. A. Rohwer]. The freshly-cut stems of 

 roadside weeds and bushes, including sumac, afforded at- 

 tractive places for the building of stem-dwellers. In less 

 than two hours after the weeds were cut, two wasps of 

 this species had already dug deep tunnels in the soft 

 pith. 



*OMcrib«<l b7 8. A. Rohwer, Proe. U. B. Nat. Mui. 68:176, 1917. 



