508 BIOLOGICAL SlItVKV OF 



11 1.KIAHKS Sj.iin)l:i 



II. carinatus Cress. Eden, July 24. 



.Mkcaciiilf. Latreille. Tin- Leaf-cutting Bi • 



M. [nfragilis Civ». Common, July 12-Sept. 23. 



M. latimanus Say. Eden, An- 11, 1926. 



M. mendica Cress. Southwest Barbor, Sept. (i. 



M. mucida Cress. Common, .June 21-July 26. 



M. relattva Cress. S. W. Harbor; Echo Lake; Bar Harbor, 



June 27-Sept. 13. 

 M. vidua Smith. Bar Harbor; S. W. Harbor; Echo Lake, 



June 7-July 20. 

 M. (anthemois) inermis Prov. Indian Point on Mowers, July 



28; S. end of Eagle Lake on Solidago, Aug. 16. Scarce. 

 M. (delomegachile) melaxophea Smith. Common on wild 



roses, etc., June 9-July 25. 

 M. (lttomegachile) brevis Say. Section 28, July 23. Not 



common. 



Osmia Panzer. The Mason Bees 



These make a cement-like mass with sand, clay, vegetable 

 fragments and a fluid which cements it together. The species 

 vary in the kind of place that they select. Some use snail 

 shells. 



0. albiventkis Cress. Echo Lake, June 17; Station F251. 

 (). atriventris Cress. Eden on cord wood, July 3. Scarce. 

 ( ). bucephala Cress. Little Round Pond under wet wood, 



July 21. Scarce. 

 .(). distincta Cress. "Mt. Desert," July 30, on flowers of 



Vicia (McAtee). 

 (). [nspeegens Lov. & Ckll. Peiiikese, July 13. Station P251 . 

 O. LiGNABiA Say. Bar Harbor, July 21. 

 0. proximus Cress. Bar Harbor, June 9; Echo Lake, June 



17-July 12. 

 ( ). itmila Cress. Bar Harbor, June 9. 

 O. simillima Smith. Common, June 9-July 12. 



