NEW MALLOPHAGA. 131 



specimens, females only, were taken from Procellaria 

 carpensis (locality ?). 



My adult specimens (three females) differ from Tasch- 

 enberg's description in these details: the eye has a small 

 hair not mentioned by Taschenberg; the front angles of 

 the antennary fossa? are prolonged into small but distinct 

 trabecular; there are five long hairs, not four, in the pos- 

 terior angles of the metathorax, four hairs rising near 

 together in a clear space and the fifth apart and near the 

 lateral margin. I find distinctly in undoubted adult spec- 

 imens the ten abdominal segments referred to by Tasch- 

 enberg, who thought his specimens might be immature. 

 The measurements agree well, those of the adult female 

 figured by me being: body, length 2.50 mm., width .56 

 mm.; head, length .75 mm., width .53 mm. I figure an 

 adult female and a very young. 



Lipeurus toxoceros Nitzsch. (Plate x, figs. 3 and 5.) 



Zeitschr. f. ges. Naturwiss. (ed. Giebel), 1866, vol. xxviii, p. 386. 

 Lipeurus toxoceros Nitzsch. Giebel, Insecta Epizoa, 1874, p. 237; 



Piaget, Les Pediculiues, 1880, p. 343; Taschenberg, Die Mallo- 



phagen, 1882, p. 149, pi. iv, fig. 7. 

 Lipeurus gyroceros Nitzsch (ed. GiebeJ), Zeitschr. f. ges. Naturwiss., 



1866, vol. xxviii, p. 386. 



An adult male and two young taken on two specimens 

 of Farallone Shag, Phalacrocorax dilophus albociliatiis 

 (Bay of Monterey, California), and one adult male from 

 a California Brown Pelican, Pelecanus californicus (Bay 

 of Monterey, California). The pelicans and cormorants 

 congregate in great numbers on the same rocks in Mon- 

 terey Bay, and it is not surprising to find a straggling 

 individual of this cormorant parasite on a pelican. Nitzsch's 

 specimen was collected on a Halieus carbo, and the spec- 

 imen described by Nitzsch as gyroceros, but declared by 

 Taschenberg to be identical with toxoceros, was found on 

 Ha liens braziliensis. 



