54 CALIFORNIA ACADEMY OF SCIENCES. 



Panama, Baja California, and Alaska, in New Mallo- 

 phaga III, 1899). The sequence of species in each 

 genus is determined by the hosts, the sequence of hosts 

 being that of the A. O. U. Check-List of North Amer- 

 ican Birds, 2d. edition, 1895. 



Docophorus. 



Docophorus procax n. sp. (Plate V, fig. 1). 



Many specimens from two Pigeon Guillemots, Gep- 

 phus columba (Bay of Monterey, California). A mem- 

 ber of the group trianguliferi Piaget (Les Pediculines, 

 p. 113), and most resembling pilosus Piaget (ibid, p. 

 116, pi. X, fig. 4) from a flamingo, Phoenicopterus anti- 

 quorum, but differing in the hairs of clypeus, of meta- 

 thorax, shape of abdominal blotches, etc. 



Description of the male. Body, length 1.45 mm., 

 width .76 mm. ; head comparatively large, with frontal 

 part of clypeus uncolored and expanded; thorax and 

 first segment of abdomen golden brown with darker 

 markings; abdomen oval, pale, whitish medially, with 

 dark brown transverse bands and blackish lateral 

 bands. 



Head, length .52 mm., width .54 mm.; conical, tem- 

 ples wide, sides rapidly approaching each other ante- 

 riorly; frontal uncolored clypeal space expanded; front 

 straight or feebly concave; no hairs on the rounding 

 uncolored clypeal region but one short marginal prickle 

 at the point where the clypeus begins to swell beyond 

 the sides of the head; a second short prickle before 

 the suture; two dorsal hairs just before the clear un- 

 colored clypeal region; two short prickles in front of 

 the trabeculce; trabecular large, reaching nearly to the 

 end of the second segment of the antennae, well col- 



