I4O CALIFORNIA ACADEMY OF SCIENCES. 



brown, transverse bar extending across each segment from 

 lateral band to lateral band; last segment with uncolored 

 anterior angles and broad median blotch ; rounded behind 

 with a few short hairs; genitalia extending forward into 

 segment 6, and with most distinct posterior portion (in 

 last two segments) cordate. 



Female, length 1.43 mm., width .62 mm.; head, length 

 .5 mm. width .5 mm.; lateral portion of transparent lobe 

 of forehead barely projecting over lateral margin of head; 

 lateral bands of abdomen broadest anteriorly, narrow 

 with inward projecting linear appendages on posterior 

 segments; transverse bands darker in medial portion; 

 last segment broad, flatly rounded. 



Colpocephalum unciferum n. sp. (Plate xii, figs. 1, 2 

 and 3.) 



Found on one out of five specimens of the California 

 Brown Pelican, Pelecanus calif omicus (Bay of Monterey, 

 California) ; and on one out of two specimens of the 

 American White Pelican, Pelecanus erythrorhync/iusil^^w- 

 rence, Kansas). This well marked species shows a re- 

 semblance to Giebel's (Nitzsch's) figure of C. ei.carenum 

 (Insecta Epizoa, pi. xiv, fig. 1), taken from Pelecanus 

 onocrotalus, but Giebel's description (p. 276) is, if ac- 

 curate, of some other species than that to which my speci- 

 mens belong. Giebel affirms the head to be longer than 

 broad, which is not the case with my specimens, and 

 which would be, as Piaget says, characteristic. I cannot 

 but make my specimens types of a new form. 



Description of male. Body, length 2 mm., width .62 

 mm.; golden brown with dark brown abdominal bands 

 and intense black head markings. 



Head, length .44 mm., width .52 mm. ; front very flatly 

 convex, almost straight, with, on each side of middle line, 



