156 BIOLOGICAL SURVEY OF 



SCELIPHRON Klug 



S. cAEMENTARius Drury. Common mud-dauber. Salisbury 

 Cove, July 24. 



PSENINAE 



PsEN Latreille 



P. PAUPER Pack. Bar Harbor, Aug. 16. 



P. BASiRUFUS Pack. Echo Lake; S. W. Harbor; N. E. Harbor, 

 July 6-18. 



Pemphredon Latreille 



P. ANGULARis Fox. Bar Harbor (Moore) ; N. E. Harbor, July 

 6 (Minot). 



Cemonus Juriiie 



C. iNORNATus Pack. Upper Hadlock Pond ; Bar Harbor, June 

 10-21. 



Stigmus Panzer 



S. AMERiCANus Pack. Bar Harbor; Echo Lake, June 15-17. 

 They make their nest in the pith of dry branches of sumac, 

 provisioning it with aphids. 



Passaloecus Shuckard 



P. MANDiBULARis Crcss. Bar Harbor ; S. W. Harbor, June 17- 

 July 29. 



Bembicinae 



Philanthus Fabricius 



P. BiLUNATus Cress. Salisbury Cove, July 14, 24. 



Aphilanthops Patton 



A. FRiGiDus Smith. Salisbury Cove, July 23. It makes its 

 nest in the ground and provisions it with queen ants. 



Cercebis Latreille 



C. CLYPEATA Cress. S. W. Harbor; Salisbury Cove; Bar 

 Harbor, July 20-24. 



C. DENTiFRONs Crcss. Salisbury Cove, July 18-24. The spe- 

 cies of this genus provision their nests with beetles. 



Alyson Jurine 



A. opposiTus Say. Salisbury Cove; Bar Harbor, July 19- 

 Aug. 15. 



