on the hyaline anterior margin of the head; thoracic sternal plate 

 with setae only on the posterior margin; sternite VII with postero- 

 lateral angles fused to subgenital plate; and width at temples greater 

 than .63 mm. 



Specimens Host Locality Date Collector 



4 9, 1 cf Thalasseus maximus Hampton, NH IX-1-1954 D.Dupee 



Saemundssonia lookeyi Clay, 1949 



Saemundssonia lookeyi Clay, 1949. Amer. Mus . Novit., no. 1409: 



11, figs. 17, 24, and 25. 

 Type host: Sterna vittata Gmelin. 

 New England host: 

 Sterna paradisaea Pontoppidan — Arctic Tern. 



Male basal plate lacking a cross-bar; endomere with terminal, 

 lightly sclerotized, evenly rounded process; parameres wider than those 

 of S. stemae; length of paramere greater than .20 mm; setae of meso- 

 some in a clustered arrangement. 



The females of S. lookeyi cannot be distinguished from those of 

 S. stemae on the Common Tern or those infesting the Sandwich Tern and 

 Sooty Tern. 



Specimens Host Locality Date Collector 



1 slide Sterna paradisaea Ship Isle, Me. — Cornell Coll. 



Saemundssonia melanooephalus (Burmeister, 1838) 



Dooophorus melanooephalus Burmeister, 1838. Handb . Ent., 2: 426. 

 Type host: Sterna albifrons Pallas — Least Tern. 



Males of this species are easily distinguished by the presence 

 of a terminal, strongly sclerotized tooth-like process on the endo- 

 mere. In the females, the 7th sternite has the posterolateral angles 

 fused to the subgenital plate; width at the temples is less than .62 

 mm but more than .57 mm; width of dorsal anterior plate .14 to .18 mm. 



Ward (1955) reports this species from South Carolina. 



Saemundssonia merguli (Denny, 1842) 



Dooophorus merguli Denny, 1842. Mon. Anopl. Brit.: 42 and 72, pi. 



3, fig. 7. 

 Type host: Plautus alle (Linnaeus) — Dovekie. 



Head with large anterior hyaline margin not emarginate ; dorsal 

 anterior plate large, width .15 mm. Trabeculae large; antennae fili- 

 form, narrow, segments short. Pterothorax with 10 marginal dorsal 

 setae. Abdomen ovoid; tergite II undivided. Male genitalia with 

 narrow parameres, bladelike and slightly curved. 



Peters (1936) reports this species from Massachusetts, New Hampshire, 

 Pennsylvania, and South Carolina. Brimley (1938) reports it from 

 North Carolina. 



151 



