May, 1908.] Descriptions of New Mallophaga. III. 357 



named were only aberrant members of the genus Menopon. 

 Professor Kellogg in Psyche, XV, p. 11, gives a systematic sum- 

 mary of the Mallophaga of the World, but makes no mention 

 of this genus. However, it seems to the writer that the two speci- 

 mens under consideration hardly can be placed in the genus 

 Menopon. They agree closely with Piaget's description and 

 figure, and the occipital tubercles, as Burmeister says, "cum 

 processu pronoti chelam formante," have not their counterpart 

 among the Menopon species so far as I have observed. 



9. Nirmis selliger Nitzsch. (New host.) Piaget, Les 

 Pediculines, 1880, p. 197, plate XVI, fig. 2. 



Two males and two females taken from the Common Tern, 

 Sterna hirundo, on Hen Island, Lake Erie, by Professor Jas. S. 

 Hine. 



10. Physostomum invadens Kell. Fig. 1 G. A single 

 specimen taken from Dendroica pennsylvanica at Columbus, O., 

 by Professors Osborn and Hine. 



This single female specimen conforms quite closely to the 

 description by Professor Kellogg in New Mallophaga III, Kel- 

 logg and Chapman, p. 50, the only apparent difference being 

 that it is a little more slender as shown by the following dimen- 

 sions: Body, length 3.06 mm., width .68 mm.; head, length .70 

 mm., width .53 mm. 



11. Docophorus syrnii [Packard?], fig. 1 I. 



Female. Body, length 2.08 mm., width .92 mm., margin of 

 abdomen, legs, and head colored a golden brown. 



Head. Length .67 mm., width .66 mm., front obtusely angu- 

 lar with a slight acuminate projection at middle, one medium, 

 and one short hair at each lateral angle ; two small hairs in front 

 of clypeal suture and two larger ones in front of trabecula; tra- 

 becula not so prominently curved as in D. communis, reaching 

 a little beyond first segment of antenna ; eye prominent and with 

 a short curved hair above; temples broadly rounded, the distance 

 from eye to prothorax divided into three nearly equal spaces by 

 two long hairs, these spaces again nearly bisected by three short 

 bristles ; occiput perceptibly curved backward ; signature distinct 

 but not strongly marked ; head rather uniform hght brown, except 

 antennal and occipital bands are distinct. 



Prothorax with straight sides slightly diverging; a hair at 

 posterior angle. Metathorax of equal length with prothorax, 

 several hairs in rounded posterior angle ; posterior margin nearly 

 straight, with a row of pustulated hairs. Legs pale brown with 

 dark brown markings on anterior margins. 



Abdomen broadly elliptical, anterior segments scarcely pro- 

 jecting, posterior ones a little more so ; two or three hairs at each 

 posterior angle ; short lateral transverse blotches with inner ends 

 rounded; last segment deeply emarginate. 



