LICE OF GENUS SAEMUNDSSONIA — WARD 87 



(USNM) ; 2 cf cf and 399 ex above host, Labrador, Turnerick, J. L. 

 Austin, Jr., coll. (HSP); 2cfcr and 299 ex S. vittata bethunei Buller, 

 Campbell Island (det. T. Clay) (AMNH). 



Saemundssonia meUinocephalus (Burmeister) 



(Docophorus inelanocephalus Nitzsch, 1818, p. 290, nomen nudem.) 



Docophorus melanocephalus Burmeister, 1838, p. 426. Hosts: "Aiif mehrern 



Sterna und Larus Arten." 

 Nirmus inelanocephalus Giebel, 1861, p. 315. Host: Sterna minuta — S a. 



albifrons Pallas. 

 Philopterus melanocephalus Peters, 1936, p. 17 (part) [nee Burmeister]. Host: 



S. antillarum antillarum (Lesson) =5. albifrons antiUarum (Lesson). 

 Saemundssonia melanocephalus (Burmeister), Clay, 1949, p. 11, figs. 8, 11. 19, 



28, 29. Host: S. a. albifrons Pallas. 



A series of Saemundssonia from the least tern has been compared 

 with a pair of neopara types. No differences may be ascertained, 

 except for a slightly smaller head width in two of the females. 



Material examined: Icf and 19 (neoparatypes) ex Sterna a. 

 albifrons Pallas (AMNH); 299, South Carolina, Charleston, E. B. 

 Chamberlain, coll. (USNM, Bishopp No. 19900); Scfcf and 799, 

 above locahty, H. S. Peters, coll. (HSP, Bishopp No. 20971) ; 19, Cuba, 

 Isle of Pines, H. S. Peters, coll. (USNM, Bishopp No. 15469); 1 cf 

 and 19, British West Indies, Bahama Islands, Acklin Island, H. S. 

 Peters, coll. (USNM, Bishopp No. 15090); Icf and 399, British West 

 Indies, Grand Caicos Island, H. S. Peters, coll. (USNM, Bishopp 

 No. 15168). 



The above lots, except for the type material, are all from least 

 terns (Sterna albifrons antillarum (Lesson)). 



Saemundssonia parvigenitalis, new species 



Philopterus melanocephalus Peters, 1936, p. 17 (part) nee Burmeister. Host: 



Sterna forsteri Nuttall. 



Male: Head width is similar to that of melanocephalus. Chaeto- 

 taxy as in sternae, with exception of tergite V, which has 8 to 10 

 setae. Parameres differ in shape from those hitherto reported from 

 the Sterninae (fig. l,a) and are markedly smaller in length (0.10 to 

 0.13 mm.). Endomeres as in figure 1,^-, with a basal, median fusion. 

 Mesosomal setae apparently absent (fig. 1,^). 



Female: May be distinguished from melanocephalus by the 

 slightly greater width of the head (0.59 to 0.62 mm.) and clypeal 

 signature (0.14 to 0.18 mm.). Thoracic sternal plate with two setae 

 on posterior margin. Abdominal chaetotaxj'- as in sternae. Sternite 

 VII has the posterolateral angles fused to the subgenital plate. 

 There are three to four setae present on each side of the last sternal 

 plate. 



