Rioinus subhastatus (Durrant , 1906) 



Physostomum sub-hastatum Durrant, 1906. Ohio Nat., 6: 528, fig. la. 

 Type host: Pipilo erythrophthalmus (Linnaeus) — Rufous-sided Towhee. 



Measurements of Type Female: 



Head Length .73 



Head Width .60 



Thorax Width .65 



Total Length 3.17 



Total Width .98 



Described from a specimen collected at Ft. Collins, Colorado, by 

 C. F. Baker. 



Rioinus thoracious (Packard, 1870) 



Nirmus thoracicus Packard, 1870. Amer. Nat., 4: 94, pi. 1, fig. 5. 

 Type host: Plectrophenax nivalis (Linnaeus) — Snow Bunting. 



I have no data on this species of Mallophaga. 



TROCHILOECETES 



Trochiloecetes Paine and Mann, 1913. Psyche, 20: 21. 



Type species: Physostomum prominens Kellogg and Chapman, 1899. 



The genus Troahiloeaetes is represented in New England by a single 

 species, Trochiloecetes lineatus (Osborn, 1896). All members of this 

 genus are parasitic on members of the family Trochilidae of the order 

 Apodiformes . 



Trochiloecetes lineatus (Osborn, 1896) 



Physostomum lineatum Osborn, 1896. Bull. U. S. Bur. Ent . (n. s.), 



5: 248. 

 Type host: Arahiloohus colubris (Linnaeus) — Ruby-throated 

 Hummingbird. 



The key to the genera under the family Ricinidae will serve well 

 for this single species found in this area. 



Carriker (1960) has reviewed this genus and placed Trochiloecetes 

 lineatus in the genus Trochiliphagus . This was understandable since he 

 had no material from the type host for examination but only the original 

 description. For the purposes of this paper, I have followed the classi- 

 fication of Emerson (1964). 



Specimens Host Locality Date Collector 



4 9 Archilochus colubris Lincoln, Me. V- 30-1936 ? 



64 



