NEW MALLOPHAGA. 93 



Docophorus atricolor n. sp. (Plate iii, fig. 9.) 



Not uncommon on the Ancient and Marbled Murrelets, 

 Synthliborhampus antic/nits and Brachyrkampus marmo- 

 ratus (Bay of Monterey, California). This species is 

 closely related to colymbinus. 



Description of male. Body, length 1.75 mm., width 

 .71 mm.; rather elongate, Nirmoid in shape, darkly col- 

 ored all over with wide, black, lateral, abdominal bands. 



Head, length .53 mm., width .6 mm.; slightly broader 

 than long, front broad, with shallow rounding emargina- 

 tion, uncolored portion of clypeus slightly expanded, an- 

 terior angles rounding; one very short fine marginal hair 

 at indistinct suture; trabecular small; antennas short and 

 slender; temporal margins with two long hairs; eyes fiat 

 with a spine; occipital margin concave; clypeal signa- 

 ture broad anteriorly, with truncate front margin, tapering 

 slowly posteriorly to truncate, posterior margin reaching 

 the mandibles; antennal bands darkly brown, right-angled, 

 with posterior ends extending transversely inwards to 

 mandibles; occipital bands distinct, slightly diverging and 

 separated from forehead by a transverse, weakly colored, 

 linear space behind antennal bands; temporal regions 

 brown with margins darker. 



Prothorax, small with anterior margin emarginated and 

 projecting under the head; lateral and anterior margins 

 distinctly and evenly bordered with dark brown to black, 

 rest of segment brown; a short spine on lateral margin, 

 and at rounded posterior angle a single hair. Metatho- 

 rax short, broad, posterior margin flatly convex, angles 

 rounded; a long hair and short spine in an uncolored 

 space in front of middle of lateral margin, and three 

 long hairs in posterior angle ; segment wholly colored 

 with darker, small, lateral, marginal blotch, in which is 

 located the clear space containing hair and spine. Legs 

 brown with darker markings. 



