34 Trans. Acad, of St. Louis 



was dug out of its burrow at Cliff Cave, Mo., on April 7, 

 1915. The aperture of the burrow was open and sur- 

 rounded by a very pretty hill of pellets resembling an ant 

 hill. It went down three inches ; it was evidently in 

 course of construction. 



Andrena claytoniae Robt. [J. C. Crawford]. This bee 

 was found in its tunnel a few inches below the surface of 

 the ground at Castlewood, Mo., on April 28, 1915. 



Nomada luteoloides Roh. [S. A. Rohwer]. One feed- 

 ing on sunflower, August 30, 1914. 



Melissodes confusa Cres. [S. A. Rohwer]. Many of 

 these bees were gathering pollen from iron-weed at 

 Wesco, August 1, 1920. 



Melissodes agilis Cr. [J. C. Crawford] . A hill of loose 

 soil with the opening in the center was found on the 

 baseball diamond July 24, 1915. The burrow was in 

 course of construction, and the female bee was at the 

 bottom. The hole was five inches deep, and went down- 

 ward quite precipitously. A second bee was taken near 

 to the above on August 22, 1915. This mother had made 

 a horizontal burrow in the face of a clay bank. 



Melissodes himaculata Lep. [J. C. Crawford]. One 

 female taken from a head of red clover July 30, 1917. 



Melissodes obliqua Say. [J. C. Crawford]. One speci- 

 men taken from the flowers of white snakeroot at Lake 

 View, Kansas on August 30, 1914, and at St. Louis on 

 August 22, 1919. A female was seen to begin digging 

 her burrow in the moist clayey soil. On another occasion 

 a specimen of M. obliqua was taken from the grasp of a 

 spider, Runcinia aleatoria Htz. [C. R. Shoemaker], to 

 which it had fallen a victim. 



Xenoglossa pruinosa Say. [J. C. Crawford]. A male 

 specimen was taken from the flower heads of white snake- 

 root on August 1, 1917, at Wickes, Mo., and on September 

 4, at the same place, a second male was removed from 

 the grasp of the spider, Runcinia aleatoria Htz. [C. R. 

 Shoemaker]. This yellow flower-spider was hidden in the 



