THE MOUNT DESERT REGION - .")().'; 



Oxybelus Latreille 



( ). quadrixotum Say. This genus, instead of carrying the 

 flies, which it used to provision, impales them on its sting. 

 Penikese in bank, July. 



Hylaeidae 



Colletes Latreille 



C. armatus Patt. Record of capture lost. The members of 



this genus build nests in the ground, often in colonies. 

 C. mesocopus Swenk. Station F39, Oct. 6. 



Hylaeus Fabricius 



H. gbessoni (Ckll.). Eden, July 15. Look for the nests of 



some of this genus in stems. 

 H. ellipticus (Kirby). Bar Harbor; Penikese, July 13-19. 

 H. modestus Say. Common, June 17- July 30. 

 H. thaspii (Robts.). S. W. Harbor, July 11. 

 H. ziziae (Robts.). Station F259. 



Andrenidae 



Andrena Fabricius 



This genus burrows in bare ground. They sometimes are in 

 colonies. I have seen females, that appeared to be guarding 

 the opening against parasites, step aside to let another go in. 



A. asteris Robts. Station F267, Sept. 5. 



A. bipunctata Cress. Station F240, May 11. 



A. carlixi Ckll. Station F241, May 11. 



A. clarkella Kirby. Station F241, April 21. 



A. cockerelli Graen. Bar Harbor; Eden, June 7-9. 



A. corni Robts. Station F236, May 11. 



A. crataegi Robts. Section 28, July 11. 



A. hirticincta Prov. S. W. Harbor, Aug. 23. On flowers of 



goldenrod. 

 A. lata Vier. Bar Harbor, June 8, 1921. Type locality. 



