NEW MALLOPHAGA. IO5 



long hair; antennse uncolored, short; clypeal signature 

 uncolored; mandibles and labium brown, a narrow lat- 

 eral brown margin along forehead interrupted in front of 

 antenna? and at suture and along temples. 



Pro thorax markedly narrower than head; quadrangu- 

 lar, with sides converging slightly toward front; one hair 

 in posterior angle ; with brown marginal band distinct 

 along posterior margin. Metathorax but little longer than 

 prothorax, w r ider, with rapidly diverging lateral margins; 

 posterior margin angulated ; four long hairs in posterior 

 angles, grouped in pairs, one pair being a short distance 

 inward on posterior margin; an interrupted, lateral, brown 

 band and a long, triangular, brown blotch projecting in- 

 wards from middle of lateral margin. Legs uncolored 

 with weakly colored tarsi. 



Abdomen elongate, with convex sides, not parallel; 

 segments of about equal length ; segment 9 short and 

 with weak, rounding emargination on posterior margin; 

 a few scattered weak hairs on surface, and segments 5-8 

 with one or two weak hairs in posterior angles; a narrow, 

 lateral band emphatic in anterior part of each segment 

 and margined outwardly by a narrow clear space ; seg- 

 ments 1-6 with large, median, pale brown transverse 

 blotch. 



Nirmus giganticola n. sp. (Plate v, fig. 6.) 



This well-marked Nirmus of the group nigrofticti was 

 taken from the Short-tailed Albatross, Diomedea albatrus 

 (Bay of Monterey, California). It was found on both of 

 two birds of this species shot. I have not found it on 

 any other bird-species. 



Body, length 3.5 mm., width .87 mm.; white with a 

 few definitely arranged black and brown spots ; of about 

 the average size and usual shape of the Nirmi nigrofiicti ; 



