84 CALIFORNIA ACADEMY OF SCIENCES. 



marginal line the stigmatal series, and still inside a faint 

 continuous uncolored line ; transverse blotch on segment 

 8 curving, and the lateral line narrow and sinuous; seg- 

 ment 9 but weakly colored ; the genitalia extending for- 

 ward into the eighth segment, and with distinct small 

 claws at posterior end. 



The female specimens were so distorted in preparation 

 as to preclude any careful description. The ninth seg- 

 ment is small but distinct, feebly and broadly emarginated, 

 and has two lateral triangular pale brown blotches. The 

 general abdominal markings similar to male, the charac- 

 teristic angulated black lateral lines being present. 



Docophorus acutipectus n. sp. (Plate iii, fig. 4.) 



A single female taken on the Rhinoceros Auklet, Cer- 

 atorhina monocerata (Bay of Monterey, Cal.) This spe- 

 cies resembles D. celedoxus Nitzsch, taken on Alca torda, 

 Ui'ia troile and Fratercula arctica, but differs in the 

 absence of sternal markings, the almost failing emargina- 

 tion of the clypeus, the character of the genital blotch of 

 the female, and in the larger size. 



Description of female. Body, length 1.94 mm., width 

 .7 mm.; golden brown with darker markings, middle 

 space in abdomen whitish. 



Head length .56 mm., width .56 mm. ; general markings 

 and shape of celedoxus; front of clypeus with very faint 

 emargination, one short marginal hair and another just in 

 front of suture; trabecular large, obtuse, reaching to 

 middle of second segment of antenna; antenna? with 

 short thick first segment, second segment longest, bear- 

 ing a short dorsal hair, third and fourth short, equal, fifth 

 longer; temporal margin with two hairs, eye with a short 

 hair, occipital border straight; signature pale smoky 

 brown, long, with posterior acuminate point, darker col- 

 ored; suture distinct; dark brown antennal bands, con- 



