Il6 CALIFORNIA ACADEMY OF SCIENCES. 



Lipeurus varius n. sp. (Plate vii, figs. 3 and 4.) 



A common parasite of the Pacific Fulmars, Fulmar us 

 facialis vars. glufischa and rodgersii, being found by me 

 on twenty-six out of thirty specimens of these Fulmars 

 shot on the Bay of Monterey, California. This white 

 and blotched species belongs to the Lifeuri circumfasci- 

 ati, and shows some similarity of appearance to tricolor 

 Piaget (Les Pediculines, p. 363, pi. xxx, fig. 4), taken 

 from an Albatross. Although this parasite was found on 

 nearly all the Fulmars shot, on none was it present in 

 large numbers (as was its companion Lipeurus celer), and 

 among all the specimens taken by me, perhaps one hun- 

 dred in total number, there is not a male. 



Description of female. Body, length 2.9 mm., width 

 .62 mm.; white, with distinct dark brown markings, 

 marginal on head and thorax, and as lateral blotches not 

 reaching the margins on abdomen. 



Head, length .6 mm., width .4 mm.; sides subparal- 

 lel, front parabolic, with five marginal hairs on forehead, 

 one of which is separated from the others and close to 

 angle of antennary fossa, and a short hair on dorsal sur- 

 face projecting beyond the margin between first two mar- 

 ginal hairs ; trabecular wanting; temporal margins with 

 a single short hair; eyes distinct, with a fine prickle on 

 margin just behind them; occipital margin straight; head 

 uncolored and pale smoky brown, with dark brown cir- 

 cumferential antennal bands and ocular blotches which 

 extend backwards, paling, over temporal region; antenna? 

 uncolored, first two segments about equal, third and fourth 

 equal and shorter, and fifth slightly longer than third or 

 fourth. 



Prothorax nearly square, angles rounding, posterior 

 ones slightly swollen; whitish, except even dark brown 

 lateral border. Metathorax elongate, slightly widening 



