66 NORTH AMERICAN MALLOPHAGA 



Genus GLIRICOLA Mjoberg. 

 Gliricola Mjoberg, Arkiv. for Zoologi, vol. 13, p. 18, (1910). 



Very close to Gyropus, differing chiefly from that genus in having 

 the claws very much reduced in size. 



Gliricola porcelli (Schrank). 



Pediculus porcelli Schrank, Enumeratio insectorum, Austriae indigenorum, p. 500, 



pi. 1, fig. 1, (1781). 

 Gyropus gracilis Nitzsch, Germar's Mag., vol. 3, p. 304, (1818). 

 Gliricola gracilis Mjoberg, Arkiv. for Zoologi, vol. 6, p. 20, (1910). 

 Gyropus porcelli Neumann, Bui. Zool. Soc. de France, vol. 37, pp. 213-216, figs. 1 



and 2, (1912). 

 Gyropus bicaudatus Paine, Ent. News, vol. 23, p. 441, pi. 20, figs. 3 and 3c, (1912). 

 Gliricola porcelli Stobbe, Deut. Ent. Zeit., p. 117, (1914). 



Extremely common upon the ordinary guinea-pig. 



Genus TRIMENOPON Cummings. 

 Trimenopon Cummings, Bui. Ent. Res., vol. 4, pp. 39-40, (1913). 



Antennae five- jointed, concealed in fossae beneath the head. Tarsi 

 with two claws. Pronotum with well developed lateral wings. Head and 

 thorax together nearly as long as the abdomen. 



Trimenopon jenningsi (Kellogg & Paine). 



Menopon jenningsi Kellogg & Paine, Ent. News, vol. 21, pp. 461-462, fig. 1, (1910). 

 Trimenopon echinoderma Cummings, Bui. Ent. Res., vol. 4, fig. 4, (1913). 

 Trimenopon jenningsi Stobbe, Deut. Ent. Zeit, p. 177, (1914). 



Originally described from a tame guinea-pig, Cavia cobaya (Panama 

 Canal Zone), and later recorded from wild guinea-pigs from South 

 America. 



Genus HETERODOXUS Le Souef & Bullen. 



Heterodoxus Le Souef & Bullen, Victorian Nat., vol. 18, p. 159, (1902). 

 Heterodoxus Paine, Ent. News, vol. 23, pp. 360-361, (1912). 



Antennae four-segmented, concealed beneath the head. Head con- 

 ical, broader than long, front rounded, sides straight, ocular emargina- 

 tions lacking. Thorax well developed, the mesothorax present but quite 

 small. Tarsi with two claws. 



