NEW MALLOIMIAOA. 23 



Mule. Body, length l..':»4 mm., widtii .^^7 mm.: liea<l, 

 length .o3 mm., widtii .'20 mm.: being thus markedly 

 shorter than the female; abdomen widening distinctly 

 posteriorly, so that segn)ent 5, which is widest, is more 

 than one and one-half times as wide as segment 1; seg- 

 mejit 8 short and much contracted within segment 7; 

 segment truncate behind: the genitalia showing indis- 

 tinctly through segments l-.J: an indistinct, me(Jian 

 pale brownish coloring on all segments. 



Nirinus interpositus n. sp. (Plate II, fig. 7). 



Three females from N'ieillot's Warbler. Th ndroua 

 hrifanti (Panama). A member of the group lnt<;rnipio- 

 fasciati, intermediate in markings between X. rulrfatua 

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

 from several passerine birds from California and Kan- 

 sas, and eusttgniun Kellogg (I.e., p. 493, pi. Ixvii. fig, 3), 

 from Troc/tilas aniub, California. In size the new 

 species is shorter than rtilfjafus but of the same width, 

 and is both shorter and narrower than Hiistii/inus. in 

 general outline of body it resembles tustujinus more 

 than rulyatus, but differs from eusti<fiiiits in having 

 the sixth abdominal segment widest instead of the 

 fourth. 



Description of the female. Body, length 1.41 mm., 

 width .41 mm.; whitish with distinct, broad, black, 

 lateral abdominal bands and thoracic borders; head 

 nearly equilaterally triangular. 



Head, length .31 mm., width .34 mm.; outline of 

 head nearly that of an eijuilateral triangle; the lateral 

 margins of the head are weakly convex outward and 

 the apex is parabolically curved; there are live or .-ix 

 short, inconspicuous hairs on each lateral margin of 

 the forehead: the trabeculie extend to the end of the 



