158 OX THE AIALLOPHAUAX FAMILY TRIMKXOPOXIDAE. 



Legs. Of usual Amblyeeran type, showing no signs of adaptation to mam- 

 malian habitat, except that the claws are more sharply bent than is usual in bird- 

 infesting forms. Femur stout, with anterior border strongly arched ; tibia nar- 

 row pyriform; tarsus with basal joint short, carrying a slight pad, distal joint 

 long and curved. No marked difference between first and remaining legs. 



Chaetotaxy. Head singularly free from hail's dorsally. Three small spines 

 at anterior border of antennary fossa; three prickles along lateral border of 

 same; a long hair flanked by two spines at temporal angle; and four evenly 

 spaced hairs on hind margin. On the underside, there is a pair of short hairs 

 on the mentum, a pair of spines on the submentum, and a series of six short 

 spinous hairs on the raised gular region, in addition to the two long hairs at the 

 postero-lateral angles already mentioned. A comb of spines projects beneath the 

 antenna from the inner wall of the fossa. 



Prothorax bears four short hairs on the raised central portion, a series of 

 six spines, increasing in length from before backwards on the lateral margins, 

 and a pair of hairs on the hind border. Metathorax bears a row of four prickles 

 anteriorly, two short spines and two hairs at the postero-lateral angles, and a 

 pair of hairs close to the mid-line on the hind border. Ventrally, the prosternite 

 has a pair of long hairs at its antero-lateral angles, and is closely covered with 

 small spines. The mesostemite has two long hairs laterally on either side, with 

 three spines between. The metasternite has two irregular rows of short spines 

 anteriorly, and a row of about five stiff hairs posteriorly. 



Abdomen bears dorsally four longitudinal rows of stiff hairs, with a series 

 of about sixteen short spines lying among them. Ventrally, there are six longi- 

 tudinal rows, and interspersed with the hairs are about a dozen peg-like spines 

 in each segment. 



Genitalia. Basal plate fairly broad, extending almost to the anterior margin 

 of segment 4, and passing backwards into a solid triangular "penis,'' flanked by 

 a pair of slender, but strongly chitinous, curved parameres. 



Description of 5. Differs from c? only in being somewhat larger in all 

 measurements, and in having the terminal segment of the abdomen evenly rounded, 

 and not so elongate as in the 6. The usual two stiff rows of hairs are placed 

 obliquely on the gonapophyses. 



Measurements in millimetres. 



Length Breadth Length Breadth 



Head .218 .403 .218 .420 



Prothorax .184 .340 .190 .370 



Metathorax .101 .370 .105 .403 



Abdomen from anterior angles . . . . .520 .504 .571 .554 



Total length and greatest breadth . . 1.008 .504 1.092 .554 



Type d and allotype ? in the Australian Museum, Sydney, New South Wales, 



No. K45561; paratype material will be sent to the British Museum (Natural 

 History), and to the Stanford University, California. 



References. 



Cummings (1913). On some nondescript Anoplura and Mallophaga. Bull. 

 Ent. Research, iv., pp. 35-45. 



Harrison (1916). The genera and species of Mallophaga. Parasitology, 

 ix., pp. 1-154. 



Kellogg and Nakayama (1914). Mallophaga of the Vizcacha. Ent. News, 

 xxv., pp. 193-201. 



