MALLOPHAGA FROM BIRDS 469 



nia, in having the head more elongate, less heavily marked, and in the 

 absence of transverse abdominal blotches, and character of lateral 

 markings. 



Female. — Body, length 1.63 mm., width .43 mm.; slender, 

 elongated ; head and thorax with dark brown margin, and abdomen 

 with narrow, dark brown lateral bands. Head, length .46 mm., width 

 .31 mm. ; conical, with clypeal front truncate or slightly convex; three 

 marginal hairs, the first one near front, and the third in front of the 

 suture, the second is midway between these ; a short prickle and a 

 marginal hair in front of trabeculae ; trabeculae prominent, a little 

 longer than segment i of antennae ; antennae short, segment 2 longest, 

 segments 3, 4 and 5 subequal ; eye prominent, with one long hair and 

 one prickle ; temporal margin flatly convex with two long hairs and 

 two prickles ; occipital margin flatly concave with few prickles ; signa- 

 ture distinct, shield-shaped, anterior margin convex, posterior margin 

 produced in a narrow point ; dark brown antennal bands interrupted 

 by a distinct suture, the anterior extremities of the antennal bands bend 

 broadly in at the suture ; temporal borders narrow but well defined, 

 broader below the eye, gradually narrowing posteriorly. Prothorax 

 with sides slightly diverging ; posterior angles rounding, with one 

 hair ; marginal borders dark brown, bending inward along posterior 

 margin. Metathorax but little longer than prothorax, wider, and 

 rapidly diverging lateral margins ; posterior margin angulated ; five 

 pustulated hairs in posterior angles ; dark brown lateral band and 

 brown blotch projecting inward from postero-lateral margin. Legs 

 concolorous with abdomen, with slightly colored margin. Abdomen 

 elongate with convex sides, not parallel ; segments i to 8 about equal 

 length ; segment 9 short, and with weak rounding emargination on 

 posterior margin ; four longish hairs on posterior margin of each seg- 

 ment ; segments 3 to 8 with one or two longish hairs in posterior 

 angles ; a narrow lateral band in anterior part of each segment ; seg- 

 ments 2 to 7 with small median blotches. 



NIRMUS PALUDICOLA sp. nov. 



(PL xxix, fig. 3.) 



A female from Butorides pluinbeus from Albemarle. A member 

 of Piaget's group nigropicti whose members occur commonly on gulls 

 and terns. This form most nearly resembles N. punctatus., but differs 

 in the slightly concave clypeal front, in the transverse marking across 

 the clypeus and in the character of the lateral abdominal blotches. 



