72 CALIFORNIA ACADEMY OF SCIENCES. 



bands distinct, blackish, the posterior part of each seg- 

 mental portion tapering acuminately; segment 8 with- 

 out lateral bands; segment 9 widely, angularly emargi- 

 nate behind, with a single very fine short hair on each 

 obtuse posterior point. 



Nirmus maritimus n. sp. (Plate VI, fig. 1.) 



Many specimens from numerous individuals of the 

 Ancient Murrelet, SynthliboTaraphiis antiquus, Cassin's 

 Auklet, Ptychoramphui aleuiicus, Rhinoceros Auklet, Gero- 

 rhinca monocerata. Also a single specimen (straggler) 

 from a Pacific Fulmar, Fulmariis glacialis glupischa. 

 All of these birds from the Bay of Monterey, California. 

 Resembling N. citrinus Nitzsch (Giebel, Insecta Epizoa, 

 p. 177; Piaget, Les Pediculines, p. 190, pi. xvi, fig. 8) 

 from Alca torda, but more slender, with elongate head, 

 angulated posterior margin of metathorax, different 

 disposition of hairs of the head, etc. 



Description of the female. Body, length 1.96 mm., 

 width .46 mm.; slender, elongate; pale fuscous w^ith 

 darker lateral borders on the head and thorax and 

 broad lateral bands on the abdomen. 



Head, length .5 mm., width .37 mm.; narrowly elon- 

 gate, conical, with clypeal front convex; three marginal 

 hairs, the first one near the front and the third in front 

 of the suture, the second is midway between these; a 

 short prickle in front of the trabecules which reach to 

 the end of the first segment of the antennae; antennae 

 short, not reaching more than two-thirds of the dis- 

 tance to the occipital margin; segment 2 longer than 

 segment 1, and segment 5 longer than segments 3 

 or 4; a few short hairs on the segment; eye with a 

 hair and a short prickle; temples with sides nearly par- 

 allel; one long hair, one short hair, and three short 



