224 INSECTS AFFECTING DOMESTIC ANIMALS. 
Nirmus fenestratus N. 
On Coccyzus erythrophthalmus (Burnett collection). 
Nirmus cyclothorax Nitzsch. 
Burmeister, Handbuch, Vol. II, p. 429, fig. 10; Denny, p. 150, Pl. XI, fig.6; Giebel, p. 187, Pl. VI, 
‘fig.9; Piaget, p. 162. 
From English sparrow, Passer domesticus (Laurent collection), and 
Acanthis linaria (2) (C. B. Cook collection). 
Nirmus candidus Nitzsch. 
On Melanerpes carolinus (Burnett collection). 
Nirmus ornatissimus Giebel. 
Giebel, p. 144; Piaget, p. 163. 
From Agelaius phoeniceus (Cassino collection). 
This handsome species can quite certainly be referred to Giebel’s © 
species, though his description is not very full. 
Nirmus ornatissimus, var. xanthocephali, n. var. 
In the male the ventral median patch is extended to the tip from the sixth seg- 
ment, there being clear lateral spaces on segment 6, and a large, clear median space 
on segments 7 and 8, and lines of dusky running from this patch to margin of seg- 
ments posteriorly on 6 and 7 and a small spot on 8 at sides. 
On yellow-headed blackbird (Xanthocephalus xanthocephalus), col- 
lected at Fairfax, lowa (H. O. collection). 
Nirmus pileus, N. 
Nitzsch, Germar’s Mag., Vol. III, p. 291; Zeitschr. fiir g. Naturwissensch., 1866, Vol. XX VIII, 
p. 373; Giebel, p. 162; Piaget, p. 182, Pl. XV, fig. 6. 
From stuffed specimens of avocet, in museum of Iowa Agricultural 
College. <A well-marked species, our specimen agreeing perfectly with 
deseription in European works. 
Nirmus citrinus Nitzsch. 
Nirmus citrinus Nitzsch, Zeitsch. fiir gesammt. Naturwissensch., 1886, Vol. XX VIII, p. 378. 
Nirmus alee Denny, p. 137, Pl. IX, Fig. I. 
Nirmus citrinus Giebel, p. 177; Piaget, p. 190, Pl. XVI, fig. 8. 
From Alleus alle (Cassino collection), Simorhynchus pygmeus, S. crista- 
tellus, S. pusillus, and Synthliborhamphus (Stejneger collection). 
Nirmus lineolatus Nitzsch. 
(1839) Nirmus lineolatus Nitzsch. Burmeister, Handbuch, Vol. II, p.428. (No description.) 
(1851) Nirmus ornatus Grube, v. Middendorft’s Sibir. Reise 477, Taf. 1, fig. 4 (vide Giebel). 
(1866) Nirmus lineolatus Nitzsch. Zeits. fiir ges. Naturwis., Vol. XXVIII, p. 376; Giebel, 177, 
Vol. IV, pp. 5, 6,7, 8; Piaget, 199, Pl. XVI, fig. 3. 
From herring gull, in collection of S. E. Cassino; Baker collection, 
Elkhart, Ind.; also recorded by Kellogg, New Mallophaga. So far as 
I can discover, there is no description of this species prior to that of 
Grube’s in 1851, the name alone appearing in Burmeister. 
Nirmus signatus Piaget. 
Les Pédic., p. 186, Pl. XV, fig. 8. 
From avocet, collected from stuffed bird in museum of lowa Agri- 
cultural College. 
This species has so much the aspect of a Lipeurus that I fail to see 
on what basis Piaget places it in Nirmus. It is readily characterized 
by the prolonged point to clypeal signature. 
