Clitellum beginning before segment thirty (Helodrilus Hoffmeister. 



This genus has been spHt into several subgenera, which are now re' 

 garded as genera.) Dew Worms 67. 



67. CHtellum before or just reaching segment twenty 'Seven ; color of most 



species brownish 



E^seniella Mich. 



(Representative species, E. tetraedra (Savigny) ) 

 Clitellum reaching behind segment twenty 'seven; most species reddish or 

 banded 68. 



68. With two pairs of sperm sacs in segments eleven and twelve; no sper' 



mathecal pores 



Bimastus (or Bimastos) Moore 

 (Representative species, B. tenuis (Eisen) ) 

 Usually with three or four pairs of sperm sacs in segments nine to twelve; 

 with spermathecal pores 69. 



69. Spermathecal pores opening on the back above the upper line of setae 



Eisenia Malm em. Mich. 



(Two common species given here) 70. 



Spermathecal pores opening below the upper line of setae 71. 



70. With a dark ring on each segment 



Eisenia foetida (Savigny) 

 Plain reddish 



Eisenia rosea (Savigny) 



71. With three pairs of sperm sacs; setae placed singly or in wide pairs 



Dendrohaena Eisen em. Rosa 



(Representative species, D. suhruhicunda (Eisen) ) 

 With four pairs of sperm sacs; setae in close pairs 

 Allolohophora Eisen 

 (Two common species given here) 72. 



72. Usually with more than 130 segments; reaching six inches 



Allolohophora caliginosa (Savigny) 

 With less than 130 segments; not over three inches long 

 Allolohophora chlorotica (Savigny) 



73. Clitellum on approximately segments 15 to 25 



Sparganophilus Benham (of Family Glossoscolecidae of some 

 writers. Family Sparganophilidae of others) 

 (Representative species, S. eiseni Smith) 

 Clitellum beginning on segment 12 to 14 and extending not farther than 

 segment 2 1 ; Family Megascolecidae 74. 



74. Setae very numerous, arranged in a ring-like arrangement around the 



segments (an introduced genus) 

 Pheretima Kinberg 



(Representative species, P. elongata (E. Perrier)) 

 Setae in four pairs per segment 75. 



75. With two consecutive gi^ards 76. 

 With one or no giz2,ard 77. 



94 



