40 Trans. Acad, of St. Louis 



own haiuliwork. 



Ceratina dupla Ray. [S. A. l^iliwcr]. Two of those 

 bees wore on tlic wild flowors at Cliff Cave on A])ril 21, 

 19J0. Tlicy carried no pollen. 



Bomhus Impaticns Harris. |.J. C. Crawford]. Those 

 bees are frecjuently met in the fields. In niidsumnior 

 several of thoni were visitinji: the potato-blossoms, and in 

 September they were abundant on the ^^ohlenrod. In 

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

 early in the morninij: on dark, clon<ly days, and on the 

 Aster mulii flora in October. 



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

 A robl)or-fly, Proctacanihus milbcrti 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. 



Bombus auricomus Robt. [S. A. Kohwer]. On Septem- 

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

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

 the wet ground. '^Fhe great difference in the size of the 

 sexes made the feat rather diflicult 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 Goer (Franklin). [,I. C. 

 Crawford]. While bumble-bees normally make nests in 

 the ground, occasionally they leave the beaten ])aths of 

 habit and build in novel situations. ()ne such novelty 

 was discovered at Eureka, Mo., on July 12, 191(j. An old 

 j)aint bueket was hanging, seven feet from the floor, on 

 a barn wall. Tliis bucket, after llic p.iint liail dried \\\), 

 had been used by wrens foi" a nesling-i)laco the previous 

 summer, and this year the bucket I'til of stieks and straws 

 was occujjied by a thriving swai'ni of bees. The second 

 odd nest was discovered in a sack filli'd with straw, lying 

 on the floor of an abandoned clul)-house at W'ickes on 

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



