In the male of this species the "effractor" is present. All 

 other characters are contained in the genus description. 



Measurements: Anatoecus dentatus (Scopoli, 1763) 

 (from Clay and Hopkins, 1951) 



Head Length .47 



Head Width .43 



Prothorax Width .28 



Pterothorax Width .37 



Abdomen Length .72 



Abdomen Width .60 



Total Length 1.45 



Anatoecus ictevodes (Nitzsch, 1818) 



Docophorus iotevodes Nitzsch, 1818. Germar's Mag. Ent . , 3: 290. 

 Pediculus mergi Guerin, 1818 {nee J. C. Fabricius, 1781). 



Bonaterre's Encyc. Method., pt. 24: 128, pi. 254, fig. 2. 

 Nirmus fuligulae Denny, 1852. List Brit. Animals in Brit. Mus . , 



pt. 2, Anoplura: 13 (nn for D. iotevodes Nitzsch, 1818). 

 Type host: Mergus servator Linnaeus — Red-breasted Merganser. 

 Other New England hosts: 



Domestic Goose 



Anas platyrhynchos Linnaeus — Mallard. 



Spatula olypeata (Linnaeus) — Shoveler. 



Aythya af finis (Eyton) — Lesser Scaup. 



Clangula hyemalis (Linnaeus) — Oldsquaw. 



Somateria mollissima (Linnaeus) — Common Eider. 



Mergus merganser Linnaeus — Common Merganser. 



In the male of this species the "effractor" is absent. Emerson 



(1964) states that, "the question of whether or not Anatoecus ioterodes 



is a dimorphic form of Anatoecus dentatus has not been settled satis- 

 factorily. " 



Measurements: Anatoecus icterodes (Nitzsch, 1818) 

 (from Clay and Hopkins, 1960) 



Head Length .43 



Head Width .40 



Prothorax Width .27 



Pterothorax Width .35 



Abdomen Length .59 



Abdomen Width .61 



Total Length 1.29 



From all of the above material, especially the host list for these 

 2 species of Mallophaga, it is obvious that a list of material exam- 

 ined would add little to what is already known about this genus. It is 

 sufficient to state that any species of Anseriformes in New England is 

 a potential host for both of these species of Anatoecus. 



73 



