40 Trans. Acad, of St. Louis 



own handiwork. 



Ceratina dupla Say. [S. A. Rohwer]. Two of these 

 bees were on the wild flowers at Cliff Cave on April 21, 

 1920. They carried no pollen. 



Bomhus impatiens Harris. [J. C. Crawford]. These 

 bees are frequently met in the fields. In midsummer 

 several of them were visiting the potato-blossoms, and in 

 September they were abundant on the goldenrod. In 

 July they were on the flowers of the buck-brush, even 

 early in the morning on dark, cloudy days, and on the 

 Aster multiflora in October. 



Bomhus americanorum Fab. (Frank.) [S. A. Rohwer] 

 A robber-fly, ProctacantJius milberti Marq. was seen at 

 rest on a plant inbibing the juices of this bumblebee on 

 August 14, 1919. These bees have often been seen on the 

 goldenrod flowers. 



Bomhus auricomus Robt. [S. A. Rohwer]. On Septem- 

 ber 1, 1920, two pairs of these bees were seen in mating 

 down by the river; one pair was on a leaf, the other on 

 the wet ground. The great difference in the size of the 

 sexes made the feat rather difficult for the little male. 

 After two minutes he flew swiftly away and paid her no 

 more heed. The day was dark, with occasional showers, 

 but this did not hinder their activity. 



Bomhus pennsylvanicus De Geer (Franklin). [J. C. 

 Crawford]. While bumble-bees normally make nests in 

 the ground, occasionally they leave the beaten paths of 

 habit and build in novel situations. One such novelty 

 was discovered at Eureka, Mo., on July 12, 1916. An old 

 paint bucket was hanging, seven feet from the floor, on 

 a bam wall. This bucket, after the paint had dried up, 

 had been used by wrens for a nesting-place the previous 

 summer, and this year the bucketful of sticks and straws 

 was occupied by a thriving swarm of bees. The second 

 odd nest was discovered in a sack filled with straw, lying 

 on the floor of an abandoned club-house at Wickes on 

 August 31, 1918. Bees heavily laden with pollen flew in 



