53° CALIFORNIA ACADEMY OF SCIENCES. 



angles; a single transverse series of short hairs along 

 posterior margin of each segment; broad, transverse 

 bands entirely covering each segment; darker at lateral 

 margin, especially on anterior segments; last segment 

 flatly rounded, with fringe of short hairs. 



Menopon monostcechum n. sp. (Plate lxxii, fig. 4.) 



Specimens from a Silver Pheasant, Phasianus nycthe- 

 merus, received by the zoological department of this 

 University from Mr. A. C. Robison of San Francisco, 

 California. 



The species is W^Qsabceguale, Piaget (Les Pediculines, 

 p. 463, pi. xxxvii, fig. 5 ) , from Eitplocaiuus. Ignitus in shape 

 of thorax and body, but has only single series of hairs 

 on the abdominal segments (subiequahe has two series on 

 each segment) ; in the matter of the hairs of the body 

 the new species is like umseriatim, Piaget (Les Pedicu- 

 lines, p. 464, pi. xxxviii, fig. 4) from Phasianus prcelatus, 

 but differs from this species in not having the posterior 

 margin or prothorax projecting backward and angulated; 

 in both subiccjiiahe and uniseriatim the females are smaller 

 than the males (according to Piaget), which unusual con- 

 dition does not obtain in the new species. 



Description of the male. Body, length 2.06 mm., 

 width .9 mm.; whitish, with faint brownish tinge ; with 

 inconspicuous but distinct markings of blackish brown 

 and chestnut; with numerous long- hairs. 



Head, length .41 mm., width .7 mm.; front rounded, 

 with indication of median angulation; with about ten 

 marginal hairs of different lengths in front of the ocular 

 emarginations, which are shallow but distinct; palpi pro- 

 jecting; the projecting temporal margins with several 

 long hairs, of which two are very long; occipital margin 

 concave, with eight long hairs; a black ocular fleck and 



