NEW MALLOPIIAGA. 21 



are oblong on segments 2-6, and tapering on segments 

 7-8; on the ventral aspect each segment has a chestnut- 

 brown median blotch which shows through above; seg- 

 ments 8 and 9 are narrow; segment 9 projects narrowly 

 backward, is narrowly but ilatly rounded behind, and is 

 mostly colored. 



Female. Body, length 1.5 mm., width .53 mm.; 

 head, length .41 mm., width .43 mm.; the head is a 

 little wider in proportion to its length than in the male; 

 last segment with distinct triangular lateral blotches 

 and angularly emarginated behind. 



Nirmus peninsularis u. sp. (Plate II, fig. 9). 



Numerous specimens from a Phainopepla, Phaino- 

 peplanitens (Baja California). A member of the difficult 

 group intcrrupto-fasciati, to which belongs my species 

 vulgatus (New Mallophaga, II, p. 496, pi. Ixvii, fig. 5), 

 from seven passerine species, simplex (I.e., p. 492, pi. 

 ixvii, fig. 2) from the Robin, Merida migraioria, and 

 the strongly marked species eustigmus (I.e., p. 493, pi. 

 ixvii, fig. 3) from Anna's Humming-bird, Trochiltis 

 annai. The species from Phainopepla resembles most 

 closely hrachijthorax Giebel (Insecta Epizoa, p. 134) from 

 Ampclis cedrorum. 



Description of female. Body, length 1.86 mm., width 

 .41 mm.; long, slender, pale, with narrow marginal 

 markings on head and intercoxal lines showing through 

 on thorax. 



Head, length .37 mm., width .31 mm.: elongate-tri- 

 angular, with bluntly rounded apex: marginal hairs of 

 forehead inconspicuous: trabecuhi? small, uncolored but 

 distinct; antenna^ when projected backward reaching the 

 occipital margin of head: eye not prominent, with a 

 prickle; temples straight, with a single long hair in 



