MALLOPHAGA FROM BIRDS 479 



LIPEURUS EXIGUUS sp. nov. 



(PI. XXX, fig. 2.) 



One female from Oceanites gracilis from Albemarle and one female 

 froin Geospiza fuligi)iosa from Albemarle. This new species re- 

 sembles li?nitatus Kell. more than any other Lipetirus^ but it differs 

 distinctly in the character of head. 



Female. — Body, length 3 mm., width .36 mm. ; slender, parallel- 

 sided, pale with light yellowish-brown markings pale but well de- 

 fined. Head, length .63 mm., width .3 mm. ; elongate conical, with 

 narrow almost pointed clear prolongation of clypeus in front, with 

 lateral marginal hairs ; trabeculae small ; flatly rounding temporal 

 margins with a few very small prickles ; occipital margin concave, 

 bare ; eyes flat, not conspicuous ; antennae with segment 2 longest, first 

 nearly as long as seginent 2, segments 3, 4 and 5 subequal, color paler 

 than head ; whole head pale yellowish-brown with dark brown marginal 

 band on forehead ; temporal margin near the eyes a feebler brown than 

 the head color. Prothorax hexagonal with latero-anterior margins 

 short and hardly distinct from lateral margins ; lateral margin slightly 

 darker than the last part of segment ; short hair at posterior angle. 

 Metathorax more than twice as long as prothorax ; sides parallel, pos- 

 terior margin straight, with four long hairs and one shorter one in 

 posterior angles, the shorter hair being next to the outermost hair; 

 color darker than rest of the segments. Legs concolorous with body, 

 narrowly dark-edged. Abdomen slender elongate, subparallel-sided, 

 widening slightly to segment 5, segments 6 to 10 tapering, segments 2 

 and 3 longest, segments i, 4, 5, 6 and 7 subequal, segments 8, 9 and 

 10 shortest; segment 10 obtusely two-pointed, each segment with a 

 short hair and bristle on margin just in front of posterior angle ; each 

 segment with a median pair of short hairs, a square pale brown blotch 

 on each side of segments i to 8, dark-edged anteriorly and separated 

 by a distinct median uncolored line ; blotches of segment 8 meeting, 

 and the marking of segment 9 continuous. 



LIPEURUS HELLERI sp. nov. 



(PI. XXX, fig. 3.) 



Males, females and young from Siila piscator ixova Culpepper, from 



Anous stolidus from Clipperton, from Sterna ftiliginosa from Clip- 



perton, from Creagrus ftircatus from Culpepper and from Geospiza 



fuliginosa from Albemarle. 



Male. — Body, length 3,93 mm., width .53 mm. ; everywhere brown 

 with margins narrowly dark ; abdomen swelling in middle ; head 



