MALLOPHAGA FROM BIRDS 477 



LIPEURUS DIVERSUS MAJOR var. nov. 



A male and a female from Pti^?t2is subalaris from Albemarle are 

 distinctly larger than the other specimens, are more strongly marked, 

 and the fifth abdominal segment of the male instead of being very short 

 is as long as the fourth, a noticeable difference. 



LIPEURUS GRACILICORNIS MAJOR Kellogg. 



Kellogg, New Mallophaga, iii, p. 30, pi. iii, fig. 3, 1899. 



Males and females from Fregata aquila from Clarion Island ; from 

 an individual of same species taken off Cape St. Lucas, and from 

 Sterna fuliginosa from Clipperton Island. Previously recorded from 

 Fregata aquila. 



LIPEURUS POTENS sp. nov. 



(PI. XXX, fig. I.) 



Males, females and young from Szila piscator from Culpepper; 

 from Anous stolidus from Clipperton Island ; from Procellaria 

 tethys from Albemarle, and from Sterna fuliginosa from Clipperton 

 Island. 



Alale. — Body, length, 4 mm., width .7 mm. ; rather robust, parallel- 

 sided, strongly marked with brown and black in regular blotches and 

 bands, head broadly triangular and blunt. Head, length .83 mm., 

 width .73 mm. ; color golden brown ; widest behind the eyes ; margins 

 of head in front of antennae nearly straight ; temporal margin feebly 

 rounding ; occipital margin weakly concave ; clypeal suture distinct ; 

 clypeus round in front, with three hairs at each angle ; at suture one 

 long hair, and behind it two long hairs, farther back a single hair; 

 signature large, transparent with rounded posterior end, front margin 

 parallel with margin of clypeus ; antennal segments uncolored except 

 last one; segment 3 longest, segments 3, 4, 5 subequal, with a few 

 hairs ; trabeculae small but distinct ; eyes very prominent ; temporal 

 margin with four long hairs and a few very short spines ; occipital 

 margin without hair or spine ; antennal bands distinct, dark brown ; 

 margin of head dark brown. Prothorax forming a parallelogram, 

 wider than long, the angles weakly rounded ; lateral margins dark 

 brown, extending inward along the front and hind margins toward the 

 middle, but not reaching it, leaving the middle third of the segment 

 uncolored. Metathorax large, parallel-sided, much wider than long; 

 posterior margin slightly concave, angles slightly rounded ; near each 



