NEW MALLOPHAGA. 52 1 



especially narrow and distinct, and the curving longitudi- 

 nal lines beyond the ends are sharply defined and black. 

 Metathorax with posterior margin straight and with about 

 ten longish weak hairs ranged along it; darkest along 

 the short anterior margin and in the latero-posterior angles. 

 Legs pale, with sharply defined marginal markings, espe- 

 cially on the coxas and on the long slender tibiae of middle 

 and hind legs. Sternal markings consisting of a small 

 median triangle with linear wings on prothorax, and of 

 black, distinct, angulated, intercoxal lines between meso- 

 and meta-coxse. 



Abdomen ovate, broad at both ends; long hairs in 

 posterior angles of segments, and short hairs, not numer- 

 ous, on dorsal surface; all segments with a broad, brown, 

 transverse blotch extending entirely across segment, cov- 

 ering almost the whole surface: the sutures, however, • 

 are broad and uncolored; lateral bands narrow, black, 

 fading inwardly into the transverse blotches ; last segment 

 broad, flatly convex behind, with a fringe of short hairs. 



Male. Body, length 1.09 mm., width .5 mm.; head, 

 length .25 mm., width .4 mm.: conspicuously smaller 

 than the female ; genitalia extending through segments 

 5—9, in shape a heavy two-pronged fork. 



Colpocephalum osborni n. sp. (Plate lxxi, figs. 2 and 3). 



Many specimens, males, females and young, from a 

 White-tailed Kite, JSlanus glaucus (Palo Alto, California), 

 resembling C. dissimile Piaget (Les Pediculines, p. 5 2 °> 

 pi. xliii, fig. 4), taken from Milvus tvgyptius (Museum of 

 Leyden), and C. tricinctum Nitzsch (Giebel, Insecta 

 Epizoa, p. 263), taken from Milvus ater. Named for 

 Prof. Herbert Osborn of Iowa, who has contributed to 

 the knowledge of American Mallophaga. 



Description of male. Body, length 1.31 mm., width 



Proc. Cal. Acad. Sci., 2d Sek., Vol. VI. ( 36 ) November 12, 1896. 



