NEW MALLOPHAGA. 



49: 



Metathorax broad, short, obtusely angled on the abdomen, 

 with a series of non-pustulated hairs along posterior 

 margin; a lateral marginal blotch with a part extending 

 inward. Legs concolorous with body, with only faintly 

 indicated marginal marking's. 



Abdomen bluntly elliptical, one-fifth wider than the 

 head; with one to two or three weak hairs in posterior 

 angles of segments, and a single transverse series of 

 short weak hairs along the posterior margin of each seg- 

 ment; translucent, smoky brown lateral bands, and pale 

 brown, broad, transverse blotches entirely across all seg- 

 ments; distinct uncolored stigmatal spots; segment 9 

 uncolored, with two small pale brown lateral blotches, 

 slightly emarginated behind, and with a few longish 

 hairs. 



Nirmus eustigmus n. sp. (Plate lxvii, fig. 3.) 



A single female of this well marked form from an Anna's 

 Hummingbird, Trochihts anna (Palo Alto, California). 

 The species belong to Piaget's group interruptofasciati. 

 It is a much broader and much more robust form than N. 

 vulgatus, the Nirmus of this group common among pas- 

 serine birds, and the lateral bands of the abdomen are 

 broad and pronounced. 



Description of the female. Body, length 1.84 mm., 

 width .62 mm. ; pale yellowish white, with narrow black- 

 ish brown head borders, and broad, blackish lateral ab- 

 dominal bands; indications of pale brown abdominal 

 blotches. 



Head, length .42 mm., width .45 mm.; broadly trian- 

 gular, narrowly truncate in front; a few short weak hairs 

 along margins of forehead, the longest being a pair con- 

 siderably in front of the trabecular: trabecular small and 

 uncolored but distinct; antennae short, segment 2 most 



