34 W. Dzvight Pierce 



The four preceding species are not colonial as far as observed, 

 but seem to have their holes scattered sparsely among the holes 

 of the other species. They are not parasitic. Cockcrellia is re- 

 corded as carrying Myoditcs triunguloid. 



Melanomada grindeliae Ckll. 



Lincoln, September 8, 1903, eight females, Pierce; Lincoln, 

 Crawford. This parasitic bee was found mainly hovering around 

 the holes of Halictus ligatus and in several cases was seen to 

 enter these holes. It is a very industrious little bee. It also is 

 a triunguloid carrier. 



Neopasites heliopsis Rob. 



Lincoln, September 8, 1903, four females, Pierce. This is 

 another parasitic bee which was taken in considerable numbers 

 especially around the holes of Halictus ligatus and Pauurgiuus 

 picrcci. Neopasites is a triunguloid carrier. It is recorded from 

 Heliopsis, Grindelia, and Solidago. 



Epeolus spp. 



Lincoln, September 8, 1903, Pierce; West Point, Crawford. 

 Several Epeoli were taken in the vicinity of the holes, although 

 not seen to enter any hole. Epeolus is a triunguloid carrier. 

 This genus is found abundantly on Solidago and Grindelia. 



Crabro sp. (Crabronidae) 



This very small wasp was found August 17, 1903, August 21, 

 1903, and September 8, 1903, hovering constantly around the 

 holes of Epinomia and Pauurgiuus. There were quite a number 

 of them. Peckham and Peckham in The Solitary Wasps, chap. 

 IV, record Crabro as dwelling in pithy stems and feeding its 

 young with Muscidae. The species under consideration is much 

 smaller but very probably was in search of the minute flies so 

 abundant about the holes. 



Oxybelus sp. 



A single little specimen of this genus was taken on September 

 8, 1903, and the same observation made as concerning the pre- 

 ceding genus and those following. Peckham and Peckham in 

 chap. VII record Oxybelus as dwelling in the ground and stor- 

 ing its nests with flies. 



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