Leeches 



Z7 



Fig. 14. Egg case and newly emerged young of Macrob- 

 dclla decora; slighth* enlarged. 



Fig. 15. Leech traps. Three views of box traps; showing from left to right, 

 the top, front and interior from the rear; a canvas bait bag is shown in 

 position above the slit-like entrance. The second type of trap is being held 

 with the entrance forward. 



