NEW MALLOPHAGA. 69 



with distinct ocular emargination; eye located in the pos- 

 terior portion of the emargination, simple or semi-divided 

 by an emargination ; temples usually swollen or "winged" 

 with rounded or nearly straight lateral margin ; just be- 

 hind the eye and along the anterior margin of the temple 

 a series of fine short hairs, the "ocular fringe"; the 4- 

 segmented labial palpi extending beyond the lateral mar- 

 gins of the head; the 4-segmented antenna; with first seg- 

 ment short, cylindrical, second, conical, truncated, third 

 goblet- shaped, fourth cylindrical or ovoid usually ob- 

 liquely truncated; prothorax usually longer than metatho- 

 rax, with produced lateral angles and bearing a pale or 

 uncolored transverse line which does not extend into the 

 lateral angular regions ; mesothorax indicated by a slight 

 constriction and sometimes by an uncolored transverse 

 line across the metathoracic segment; first segment of 

 tarsus short, with a small flat lobe or plate, second very 

 long and slender; abdomen with nine segments, the pos- 

 terior one differing in the sexes, with distinct dorsal and 

 ventral posterior borders. Color whitish or yellowish 

 with pale to dark brown markings. The genus contains 

 many species, found on all birds except ostriches. 



Genus Boopia Piaget. The single species upon which 

 this genus is established by Piaget was found by him in 

 company with individuals of Colpocephalum truncatum on 

 Phascolomys fossor, a wombat! Can these true Liotheid 

 forms have been stragglers from some bird host to this 

 mammalian host? The characters of the genus, as shown 

 by the one species, are: Body about 2 mm. long; head 

 rounded in front, ocular emargination wide but shallow, 

 situated more anteriorly than in other Liotheida;; eye 

 hemispherical, very large, located in the anterior portion 

 of the ocular emargination; temples angularly produced; 

 the palpi passing the margins of the head by three seg- 



