THE MOUNT DESERT REGION 407 



Ochthera Latreille 



0. mantis DeG.)- Bar Harbor, July 26. 



Hydrellia R.-Desvoidy 



H. advenae Cr. First taken in blossoms of Nymphaea ad- 

 vena, July 25, '35. Type locality. 



H. caliginosa n.sp. Cress. New Mill Meadow on Nymphaea 

 advena, July 25, '35. Type and paratypes in Acad. Natl. 

 Sci. and four paratypes in cabinets. 



H. prudens Curr. (johnsoni Cress.). Taken with above. 



Hydrina Desvoidy 



H. debilis Loew. Green Mt. ; Long Pond, July 25-Sept. 7. 



H. Formosa Loew. Bar Harbor, Aug. 12-16. 



H. fuscicornis Loew. F306. 



H. obscuripes Loew. Bar Harbor, Aug. 16. 



H. procteri Cress. First taken on New Mill Pond in blos- 

 soms of Nymphaea advena, July 25, '35. Type locality. 



H. scapularis Loew. Narrows, July 27-Aug. 13. 



H. tibialis Cress. New Mill Pond on Nymphaea advena, 

 July 25. 



H. valida Loew. Narrows, July 27-Aug. 13. 



H. sp. Penikese, Aug. 15. 



Lytogaster Becker 



L. gravida Loew. Bar Harbor, July 24. 



Parydra Stenharnmer 



P. alpina Cress. Long Pond; Bar Harbor, July 16- Aug. 10. 



P. bituberculata Loew. Bar Harbor, Aug. 10. 



P. imitans Loew. Narrows, Sept. 12. 



P. quadritubeeculata Loew. Bar Harbor, July 20. 



P. varia Loew. Duck Brook; Bar Harbor, Aug. 18. 



Dimocoenia Cresson 



D. spinosa Loew. Narrows, Aug. 13-Sept. 12. 



