I30 CALIFORNIA ACADEMY OF SCIENCES. 



by Taschenberg which distinguishes this species from the 

 otherwise similar form bifasciatus Piaget, found on Pele- 

 canus crispits (Zool. Garden of Rotterdam). 



I figure both sexes, although Taschenberg's figure of 

 the male is good. I figure also two stages of the young. 

 The measurements of the specimens figured are as fol- 

 lows : Male, body, length 2.6 mm., width .62 mm. ; head, 

 length .52 mm., width .5 mm. Female, body, length 2.7 

 mm., width .9 mm.; head, length .56 mm., width .56 

 mm. Young female, body, length 2.28 mm., width .72 

 mm.; head, length .5 mm., width .48 mm. Very young, 

 body, length 1. mm., width .44 mm.; head, length .375 

 mm., width .44 mm. 



Lipeurus temporalis Nitzsch. (Plate x, fig. 1.) 



Germar's Mag. EntonioL, 1818, vol. lii, p. 292. 

 Ricinus mergi serrall De Geer, Mem. pour servir a Fhist. des Iusectes, 



1778, vol. vii, p. 78, pi. iv, fig. 13. 

 Pediculus mergi Fabiicius, Species Insectorum, 1781, vol. ii, p. 480. 

 Lipeurus temporalis Nitzsch. Denny, Monograph. Anoplnr. Brit., 



1842, p. 175, pi. xiv, fig. 7; Giebel, Insecta Epizoa, 1874, p. 239; 



Piaget, Les Pedicnlines, 1880, p. 350, pi. xxxi, fig. 1. 



Two females and a male taken from a Red-breasted 

 Merganser, Merganse?' serrator (Bay of Monterey, Cali- 

 fornia). The measurements of the female are: body, 

 length 3.21 mm., width .9 mm.; head, length .7 mm., 

 width .44 mm. 



Male. Body, length 2.56 mm., width .5 mm.; head, 

 length .66 mm., width .5 mm. Both Denny's and Piaget's 

 figures are of the female. I figure the male. 



Lipeurus testaceous Tschb. (Plate xi, figs. 2 and 4.) 



Taschenberg, Die Mallophagen, 1882, p. 135, pi. v, fig. 3. 



With some doubt I refer to this species five individuals 

 taken from a Black-vented Shearwater, Puffinus ofistho- 

 melas (Bay of Monterey, California). Taschenberg's 



