NEW MALLOPHAGA. 501 



and because of numerous minor differences, such as the 

 definite and characteristic number and arrangement of 

 the long hairs of the metathorax, the presence of a hair 

 on the temporal margins of the head, and the character 

 of the genital blotch of the female. 



Description of the female. Body, length 2.8 mm., 

 width .66 mm.; colored and marked like variabilis; 

 whitish, with distinct black lateral borders and chestnut 

 median abdominal blotches concave on the sides. 



Head, length .66 mm., width .5 mm.; in general like 

 variabilis, but without ocular bands, or rather with large, 

 subcircular ocular blotches in place of ocular bands 

 (Giebel found merely " ein schwarzer Punkt" in varia- 

 bilis); temporal margins not bare as in variabilis, but 

 with a prickle behind the prominent eye, and a distinct 

 hair and a prickle at the posterior angle. 



Metathorax with a single long hair in the apex of the 

 posterior angle, and just inside of this a white space with 

 four long hairs (two in variabilis). 



Abdomen not wholly bare except in angles, as Piaget's 

 description of variabilis says, but with two longitudinal 

 submedian rows of weak hairs, each in a small but dis- 

 tinct clear spot; the characteristic small triangular gen- 

 ital blotch of the female of variabilis is wanting, being- 

 replaced by a short, broad, oblong blotch which is united 

 to the ventral segmental blotch preceding it, this seg- 

 mental blotch being united also with the one preceding it. 



Male. Body, length 2.5 mm., width .5 mm. ; head, 

 length .56 mm., width .4 mm. ; with the strangely shaped 

 head of variabilis, wider in front of the antennae than 

 across the temples; distinct black antennal bands, ocular 

 blotches, and borders of posterior angles of temples run- 

 ning along posterior margin and terminating in a subcir- 

 cular head; trabecular (wanting in female) peculiarly 



