LICE OF GENUS SAEMUNDSSONIA — ^WARD 89 



Saemundssonia brevicornis (Giebel) 



Docophoriis brevicornis Giebel, 1874, p. 112. Host: Sterna acuflavida— Thalasseus 



sandvicensis acuflavidus (Cabot). 



Male: This may be separated from laticaudata by the lesser width 

 of the clypeal signature (0.14 to 0.16 mm.) and also by the lower 

 number of setae (2 to 5) on the sixth abdominal tergite. Slight 

 differences exist in chaetotaxy between this species and laticaudata 

 (ex T. m. maximus) as shown in table 1. 



Female: Similar to laticaudata, except for the feature (in all speci- 

 mens examined) of the separation of sternite VII from the sub- 

 genital plate. Three setae on each side of the last sternite. Ab- 

 dominal chaetotaxy as in sternae (Clay, 1949, p. 10, table 1). 



Neo types are erected for this species, as Giebel's type in Germany 

 was destroyed during World War II. 



Table 1. — Dorsal chaetotaxy of Saemundssonia brevicornis and S. laticaudata 



S. brevicornis S. laticaudata 



Pterothorax 15-18 16-19 



Abdomen II 2-4 4-6 



III 6-9 7-9 



" IV 8-12 10-12 



" V 5-10 8-11 



"VI 2-5 6-9 



VII 4 4-7 



Type material: Neo type cf (the specimen with genitalia contained 

 within the abdomen) and neallotype 9 (to the left of the neotype as 

 viewed through the microscope) ex Cabot tern {Thalasseus sandvicensis 

 acuflavidus (Cabot)), British West Indies, Kagged Islands (Bishopp 

 No. 15031). Neoparatypes as follows: The remaining single cf and 

 9 on the above slide; 3cf cf and 399, British West Indies, Turks Is- 

 lands, Sand Cay (Bishopp No. 15207); 2d'd' and 399, British West 

 Indies, Little Inagua Island (Bishopp No. 15247); 1 cf and 299, 

 British West Indies, Bahama Islands, Ragged Island, South Channel 

 Cay (Bishopp No. 15042); 1 cf, Cuba, Rum Cayo (Bishopp No. 

 15460). All the above specimens were collected by H. S. Peters and 

 are deposited in the U. S. National Museum. 



Saemundssonia meridiana Timmennann 



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



Sterna anaethetus melanoptera Swainson. 

 Saemundssonia meridiana Timmermann, 1950, p. 1, fig. 1. Host: S. anaethetus 

 melanoptera Swainson. 



Male: This species may be readily recognized by its head width 

 and elongate parameres; both of which are greater than those of any 

 other species found on terns. Mesosomal structures as in figure 1,€. 



