MALLOPHAGA FROM BIRDS 467 



cephalus ititercedens from Albemarle, and one female from Geospiza 



fuliginosa from Island. A well marked form of unusual 



markings and shape, belonging to the communis group. 



Male. — Body, length 1.3 mm., width .53 mm. ; head golden brown, 

 with dark brown marginal marking. Head, length .48 mm., width .43 

 mm. ; front of clypeus angularly emarginated, a short hair rising from 

 the dorsal surface near the margin in each rounded latero-anterior 

 angle of the clypeus, a short marginal hair behind it, and three in 

 front of the trabecul£e ; the trabeculte large, acutely pointed, reaching 

 to base of segment 3 of antennae ; antennae, if projected backward, reach 

 almost to posterior margin of the head ; eye prominent, with a longish 

 hair ; temporal margin convex, with two long hairs and two prickles, 

 occipital margin sinuous ; signature indistinct, with anterior margin 

 emarginated, posterior point projecting beyond the mandibles ; antennal 

 bands pale brown, conspicuous, widely diverging occipital bands ; occip- 

 ital margin narrowly edged with black. Prothorax subquadi'angular ; 

 rounded posterior angles with one hair ; posterior margin flatly con- 

 cave ; color golden brown ; distinct brown lateral borders which bend 

 inward at posterior angle. Metathorax pentagonal, with three hairs 

 in lateral angle and four hairs ranged along each latero-posterior mar- 

 gin ; brown lateral border which bend inward at posterior margin. 

 Legs pale brown, with tarsi brown. Abdomen short, obovate ; seg- 

 ments 3 to 6 with one hair on the posterior angles, segments 7-8 with 

 two hairs; a transverse series of 12—16 hairs along caudal margin of 

 each segment ; the whole colored golden brown except tip of segment 

 9 ; lateral bands dark brown, composed of a series of slightly diagonal, 

 narrow, marginal blotches, one on each segment, each blotch widest 

 anteriorly ; on segments i to 5 lateral blotches extend inward ; a nar- 

 row transverse line in the posterior margin of each segment ; genitalia 

 showing through the wall. 



Fe7nale. — Body, length 1.4 mm., width .53 mm.; head, length .5 

 mm., width, .45 mm. ; elongated narrow segments i to 7 with several 

 pustulated hairs along posterior margin ; segment 9 with posterior 

 margin deeply notched, no hair. 



Genus Nirmus. 

 NIRMUS GLORIOSUS sp. nov. 



(PI. XXIX, fig. I.) 



Many males and females from Sterna fuliginosa^ three specimens 

 from Clipperton ; Anous stolidus from Clipperton ; Geospiza fuligi- 



