NEW MALLOPHAGA. l6l 



Menopon infrequens n. sp. (Plate xv, fig. 5.) 



A single female taken from a Glaucous-winged Gull, 

 Larus glaucescens (Bay of Monterey, California). 



Description of female. Body, length 2 mm., width 

 .81 mm. ; brown with chestnut, transverse abdominal 

 bands, narrow black lateral bands, and broadly linear, 

 diagonal, black, ocular blotches. 



Head, length .31 mm., width .62 mm., thus being just 

 twice as wide as long; brown with darker fuscous clouds; 

 narrow black occipital margin ; black ocular blotches in 

 the form of diagonal bars; some indefinite pale to uncol- 

 ored spaces, as in the posterior angles, along the front, 

 and a more definite circular space containing a long hair 

 and a spine on each side of the forehead just outside of 

 the origin of the labial palpi; on the front four short hairs 

 near the middle, and on the sides in front of the ocular 

 region two short hairs and one longer but weak hair; 

 temporal angles with three long hairs, one one-half as long 

 and some shorter hairs; occipital margin with four pus- 

 tulated hairs; on ventral aspect occipital bands showing, 

 enclosing an orbicular occipital signature, with a series of 

 five pustulated hairs along the lateral margins. 



Prothorax, with fourteen long, pustulated hairs extending 

 in series from lateral angle to lateral angle along the poste- 

 rior margin, which in its middle third is almost straight; 

 ground color of segment largely clouded with fuscous to 

 dark brown, especially in lateral angle region, which is very 

 narrowly margined with black ; the usual transverse line in 

 front of middle with curving longitudinal lines at the ends 

 especially distinct. Metathorax with lateral emargination 

 and dark brown sutural lines separating mesothorax; pos- 

 terior margin straight, with a series of not very long 

 hairs, and two or three hairs and a spine in the posterior 

 angles; a fuscous transverse band across posterior half of 



Proc. Cal. Acad. Sci., 2d Seb„ Vol. VI. ( 11 ) March 14. 1896. 



