30 CALIFORNIA ACADEMY OF SCIENCES. 



lines; mesosternum with a rather large, brownish, me- 

 dian blotch; metasternum with weak indications of a 

 median blotch. 



Abdomen short, nowhere broader than thorax, with 

 subparallel sides until segment 7 is reached, when the 

 posterior tapering is begun; segments 1-6 of about 

 equal size; segment 7 longer than others; segments 

 8-10 successively narrower and shorter; an uncolored 

 median longitudinal line extending whole length of 

 abdomen, rest of surface colored blackish brown by 

 large quadrangular lateral blotches, which have clear 

 stigmatal spots and are palest along inner margin; 

 last segment angularly emarginated, with three short 

 hairs on each point; segments 1-4 with a single very 

 short hair in each posterior angle, segments 5-9 with 

 longer hairs. 



Lipeurus forficulatus Nitzsch. (See Kellogg, New Mal- 

 lophaga, I, 1896, pi. ix, figs. 3, 4, 5 and 6). 

 Many specimens from a Californian Brown Pelican, 

 Pelecanus californicus (Baja California). Taken pre- 

 viously by me from same host species (Bay of Monte- 

 rey, California). 



Lipeurus gracilicornis Piaget. (Plate III, fig. 3). 



Les Pediculines, ISSO, p. 309, pi. xxv, tig. 6. 



Many specimens including males, females, and young 

 from a Man o'War Bird, Fregata aquila (Panama). My 

 specimens, to which I give a varietal name, differ from 

 Piaget's types (taken from Fregaia minor), as described, 

 in three important particulars, viz., character of an- 

 tennae, metathoracic hairs, and size. In other particu- 

 lars the specimens from the two bird species agree well. 



Var. major Kellogg. Measurements (Piaget's meas- 



