APPENDIX A 165 



— Jaws absent or vestigial ; median dorsal stripe absent . . 50 



50. Genital pores in furrows between annuli ; ground colour 

 of ventral surface lighter than that of dorsal. 



Haemopis grandis (Verrill 1874) 



— Genital pores in middle of annuli; ground colour of 

 ventral surface not lighter, usually darker than that of 

 dorsal. Haemopis plumbea Moore 1912 



51. With a dark brown median dorsal stripe, no spots; 

 about 20 teeth per jaw. 



Philohdella floridana Verrill 1874 



— With a light yellow median dorsal stripe and dorso- 

 lateral brown spots ; about 40 teeth per jaw. 



Philohdella gracilis Moore 1901 



Section 5. Key to the Family Haemadipsidae 



Only one genus in the area, Xerohdella v. Frauenfeld 

 1868 (Fig. 18). 



Fig. 18. Dorsal view of the head of Xerohdella annulata. 



From Autrum. 



52. 3-3 J annuli between gonopores. 



Xerohdella lecomtei v. Frauenfeld 1868 

 — A\ annuli between gonopores. 



Xerohdella annulata Autrum 1958 



Section 6. Key to the Family Erpobdellidae 



53. European leeches (can be identified on external features) 54 



— American leeches (require dissection for further 



identification) 59 



54. All annuli of the body of about the same width . . . . 55 



