THE MOUNT DESERT REGION 113 



DESMOPA< iikia liabingtou 



D. coxvexa (Aube) (2374). Station F386. This is a scarce 

 form here. Taken in Gt. Heath in water F386. The best 

 place for them is said to be in grass roots along the margin 

 of water. This is the single species representing this genus 

 in the eastern IT. S. 



Bidessus Sharp 



B. affixes (Say) (2390). Taken at Stations F384, F389, 

 F393 and F394. 



Coelambus Thomson 



C. ixaequalis (Fab.) (2403). Stations F186 and F386. Not 

 common. 



C. faectus (Lee.) (2405). Swamp E. end of Jordan Pd. 



Station F319. Only one specimen taken. 

 C. impresso-puxctatps (Sch.) (2424). Stations F383 and 



F386. Xot common. 



Hydroporus Clairville 



H. (deboxectes) depeessus (Fab.) (2428). Pool head of 



Bear Br., Aug. 10 (Br.). 

 H. undulatus Say (2447). Ireson Hill Pd., July 12. Pond 



near N. E. Branch. Sept. 1 scraping aquatic plants. 

 H. sp. near uxdulatus. Series 1, Station F384. 

 H. sp. near unduiattjs. Series 2, Station F383. Series 1 



and 2 are different species. 

 H. clypealis Slip. (2452). Station F384 among trees. 

 H. carolixus Fall (2464). Pool near Camp grounds, July. 

 H. coxsimilis Lee. (2454). A good series taken in the small 



swamp at the S. E. end of Jordan Pond July '39 but not 



taken elsewhere. 

 H. dextellus Fall (2506). Stations F383, F384, F394 and 



F397. 

 H. xiGEE Say (2514). New Mill Pond, Aug. 7: S. \V. Har- 

 bor, July 14. Scarce. 



