Rioinus medius Uchida, 1926 



Physostomiov intermedium Uchida, 1915. {nee Piaget, 1880). Annot. 



Zool. Jap., 9: 68, fig. 1. 

 Rioinus medius Uchida, 1926. J. Coll. Agri. Tokyo, 9: 54 {nn for 



P. intermedium Uchida, 1915). 

 Type host: Parus ater insularis Hellmayr or Parus atricapillus 



Linnaeus — Black-capped Chickadee . 



Specimens Host Locality Date Collector 



1 d" Parus atricapillus Bar Harbor, Me. 11-23-1936 E.Anthony 



I have seen a single male Rioinus sp. from Parus atrioapillus 

 Linnaeus (Bar Harbor, Maine, February 23, 1936), but due to the fact 

 that 1 was unable to obtain Uchida 's original paper describing this 

 species, I am not able to make a specific identification. 



Rioinus melospizae (McGregor, 1917) 



Physostomum melospizae McGregor, 1917. Ent . News, 28: 436, pi. 28, 



figs. 3 and 6. 

 Type host: Melospiza melodia Wilson — Song Sparrow. 



Described from 2 females collected in Minnesota. Head evenly 

 rounded in front and the occipital angles are produced posteriorly only 

 slightly unlike Rioinus angulatus and R. diffusus. Prothorax roughly 

 hexagonal; pterothorax with a slight swelling on the anterior 3rd of 

 the sides; abdomen with sides subparallel, terminal segment bluntly 

 rounded, with 4 long hairs and a fringe of 10 setae, lateral bands 

 almost colorless. 



Peters (1928) reports this species from Ohio, and Peters (1936) 

 from Delaware, Michigan, New Hampshire, Ohio, and Pennsylvania. 



Specimens Host Locality Date Collector 



1 9 Melospiza melodia Cape Cod, Mass. — C.M.Herman 

 1 slide " " Cohasset, Mass. V-5-1926 BMS 



Rioinus merulae (Durrant , 1906a) 



Physostomum merulae Durrant, 1906a. Ohio Nat., 7: 35, fig. Id. 

 Type host: Turdus migratorius Linnaeus — Robin. 



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

 C. F. Baker. 



Measurements of Type Female: 



Head Length .75 



Head Width .75 



Thorax Width 1.04 



Total Length 4.70 



Total Width 1.30 



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