44 EARTHWORMS AND LEECHES [CH. I 



H. (Z>.) rubidus, var. subrubicunda (Eisen). Red dorsally. Pro- 

 stomium extends f into 1st segment. Body somewhat flattened. 

 Setae widely paired. Clitellum from 25th or 26th to 31st or 

 32nd. Tubercula pubertatis from 28th to 30th, confluent. 

 Genital setae on 16th. First dorsal pore between 5th and 6th. 

 Total segments 60 to 110. Length 65 to 90 mm. .Thickness 

 about 4 mm. 



H. (D. ) mammalis (Sav. ). Pale violet dorsally. Prostomiuni extends 

 *\ through 1st segment. Setae separate, not paired. Clitel- 

 lum from 31st to 36th segment. Tubercula pubertatis on 

 33rd and 34th, confluent. Total segments 98 to 100. Length 

 35 to 40 mm. Thickness 2 to 3 mm. 



H. (D.) octaedrus (Sav.). Violet-brown, coppery. Prostomium 

 extends f into 1st segment. Setae separate, not paired. 

 Clitellum from 27th, 28th, or 29th to 33rd or 34th. Tubercula 

 pubertatis from 31st to 33rd, confluent. Spermathecal 

 apertures 3 pairs, between 9th and 10th, 10th and llth, llth 

 and 12th. First dorsal pore between 4th and 5th. Total 

 segments 80 to 95. Length 25 to 40 mm. Thickness 3 to 

 4 mm. 



subgenus Bimastus H. F. Moore. Clitellum not reaching past 

 32nd segment. Tubercula pubertatis absent or inconspicuous. 

 2 pairs of vesiculae seminales. No spermathecse. Generally 

 small and pigmented reddish. 



H. (B.) eiseni (Levins). Pale violet dorsally. Prostomium reaches 

 furrow between 1st and 2nd segment. Setae closely paired. 

 Clitellum from 24th or 25th to 32nd. No tubercula puber- 

 tatis. First dorsal pore between 5th and 6th. Total segments 

 75 to 110. .Length 30 to 48 mm. Thickness 2 to 4 mm. 



H. (B.) constrictus (Rosa). Red dorsally, especially anteriorly. 

 Prostomium extends f into 1st segment. Setae widely paired. 

 Clitellum from 26th to 31st. No tubercula pubertatis. Setae 

 on 16th on broad papillae. First dorsal pore between 5th 

 and 6th. Total segments 90 to 105. Length 20 to 30 mm. 

 Thickness 3 mm. 



genus Octolasium Orley, em. Rosa (part of Allolobophora Rosa). 

 Prostomium extends into 1st segment, sometimes crosses it. 



