NEW MALLOPHAGA. 79 



in any one vial may be assorted into species putting each 

 species in a vial by itself and giving this vial the same 

 accessions number as the original vial and in addition a sub- 

 number or letter. In my catalogue of accessions there are 

 entered under each accessions number the sub-numbers 

 or letters with specific name of the parasites when deter- 

 mined. By this plan, any specimen of parasite can be 

 traced at any time to the individual bird from which it 

 came, and statistics of abundance on the host, of number 

 of individuals of a single species, or of the constant or 

 casual occurrence of a parasite species on a host species 

 can be compiled. Also, the parasitic faunae of different 

 specimens of the same bird-species from different local- 

 ities can be critically compared. 



The alcohol modifies the specimens but little; their 

 hard chitin covering prevents appreciable shrinking, and 

 the colors are due chiefly to the excess or scantiness of 

 chitinization in different parts of the body, a coloration 

 not much affected by alcohol. Specimens intended for 

 dissection can be well preserved in soft condition in a five 

 per cent, solution of chloral hydrate. 



Descriptions of New Species. 

 Docophorus calvus n. sp. (Plate iii, fig. i.) 



A single female, taken on a California Murre, Uria 

 troile calif ornica (Bay of Monterey, California). 



Description of female. Body, length 1.7 mm., width 

 .8 mm.; short, broad, small, with golden brown mark- 

 ings, darker on margins, almost without hairs. 



Head, length .53 mm., width .56 mm., thus being slightly 

 wider than long; conical, with uncolored frontal part of 

 clypeus slightly expanded and feebly emarginate; suture 

 distinct; lateral margin of head in front of suture slightly 

 concave; temporal margins convex with two hairs, and 



