NEW MALLOPHAGA. IOI 



markings consisting of broad intercoxal lines, and a tri- 

 angular median blotch on metathorax. Legs mostly un- 

 colored, with femur semiannulated with dark brown at 

 basal and distal extremities; tibiae annulated at distal end; 

 tarsus light brown; claws uncolored. 



Abdomen, elongate ovate; posterior angles of segments 

 with few hairs; surface glabrous, first segment without 

 transparent lateral margin, with circular black spot in 

 anterior angle; segments 2-6 with transparent lateral 

 margin, narrower posteriorly; in each anterior angle a 

 black, linear, obliquely directed blotch produced anteri- 

 orly across the suture and into the preceding segment; 

 on segment 7 this blotch very faint or obsolete; at the 

 posterior angle a small distinct blotch; on the eighth 

 segment a small marginal blotch, and on the ninth a 

 transversal, curving, brown line; on the dorsal surface 

 a small, short, curving, median, transversal brown line 

 on the second segment, and a similar slightly larger 

 one on the third segment: on segments 3-6 the broad 

 transversal blotches of the ventral surface show through, 

 as also do the chitinized parts of the genitalia; on the 

 ventral surface there are median transversal brown mark- 

 ings as follows : on the first segment a small wide tri- 

 angle, on the second segment a semiellipse with con- 

 vex side forward, on segments 3-6 broad transverse 

 blotches largest on segments 4-5 ; genitalia showing dis- 

 tinctly; one or two hairs at posterior angles of segments 

 1-7 ; segment 8 with a strong, long, hair and a shorter one 

 on lateral margin; segment 9 with strong hairs arising 

 from dorsal and ventral surfaces of the rounded poste- 

 rior margin, in all about ten. 



Nirmus hebes n. sp. (Plate v, fig. 3.) 



A single poorly- preserved specimen from a Royal 

 Tern, Sterna maxima (Bay of Monterey, California). 



