124 CALIFORNIA ACADEMY OF SCIENCES. 



legs concolorous with the pale body color, not strongly 

 colored; the last two segments of the abdomen not, as in 

 angusticeps, with straight tapering sides bearing six short 

 hairs and the last segment emarginated, but with convex 

 margins with two or three rather long hairs, and the last 

 segment very finely if at all emarginated. Female, the 

 last segment of the abdomen not " profondement entaille" 

 but slightly and narrowly emarginated; also no median 

 uncolored line on the first two segments. 



Lipeurus limitatus n. sp. (Plate viii, tigs. 5 and 6). 



Three females taken from a Dark-bodied Shearwater, 

 Puffinus griseus (Bay of Monterey, California). This 

 species belongs to the group clypeati sutura iudistincta, 

 and is the first Lipeurus to be found on Puffinus. 



Description of female. Body, length 2.75 mm., width 

 .41 mm.; slender, parallel-sided, pale with light yellowish 

 brown well defined markings. 



Head, length .6 mm., width 4. mm.; elongate, conical, 

 front rounded, with four short marginal hairs, one on 

 dorsal surface between first and second marginal hairs, 

 and one very short hair at antennal angle; trabecular 

 wanting; temporal margins with one hair; occipital mar- 

 gin nearly straight; eyes inconspicuous; antennae with 

 second segment longest, first nearly as long, fifth slightly 

 longer than either the third or fourth, which are equal, 

 concolorous with the head or paler; whole head pale, yel- 

 lowish brown, with darker marginal bands of forehead 

 connected at front by paler striated clypeal band; a nar- 

 row, frontal margin of the clypeus transparent; the rest 

 of the clypeus pale brown, hinder margin emarginated; 

 a brown ocular blotch, and the temporal margins near the 

 eyes feebly browner than head color. 



Prothorax short, hexagonal, w r ith latero-anterior mar- 



