THE MOUNT DESERT REGION 441 



XlPHYDRlIDAE 

 Xli'HYDKiA Latreille 



X. tibialis Say. Salisbury Cove, July 15 (Olsen). 



Sikicidae. The Horn Tails 

 Sirex Linnaeus 



S. juvencus cyaneus Fab. Bred from spruce at Corfield 

 Sept. 9-17. 



Urocerus Geoffroy 



U. albicoenis (Fab.). West side of the Island in July. The 

 larva bores in conifers and a good way to take the adults is 

 to go where spruce is being- cut for pulp. West side of Island 

 June 15-July 30. Reared from larch June '43. Its parasite 

 is Kliyssa lineolata (Kby.). 



U. cressoxi Nort. Penikese, July 8-Aug. 11. Scarce. 



U. flayicorxis Fab. Bar Harbor flying. Aug. 5. Reared 

 from a mixed lot of hardwood Sept. 9. 



Xeris Costa 



X. spectrum (Linn.). One specimen on cord wood at Eden, 



June 24, '37. Rare. 

 X. catjdata Cresson? Bar Harbor, July 28 (Br.). 



Tremex J urine 



T. coiiUMBA (Linn.). On August 31, 1936, 1 found a partially 

 dead maple tree in which dozens of this species were ova- 

 positing as were Megarhyssa atrata, M. nortoni, and among 

 them one .1/. greenei. 



Cephidae 



Janus Stephens 



.1. bimaculatus Nort. S. W. Harbor, July 10. 



Texthredinidae. Typical sa-wflies 

 Hemitaxonus Ashmead 



H. AiLBiDOPiCTUS Xort. Echo Lake; Eagle Lake, June 17- 



Julv 18. 



