75 
THE MALLOPHAGAN FAMILY TUI M EN OP ON I DAE. 
By G. F. FERRIS, M.A., 
Stanford University , California. 
(With 8 Text-figures.) 
Three species of two-clawed Mallophaga have heretofore been recorded from 
South American mammals. Concerning one of these species, Menopon ex- 
traneum Piaget, nothing is known aside from the information included in the 
original description and, judging from this and the accompanying figure, it 
appears not to differ from the usual type of bird-infesting members of this 
group. The other two species have each been made the type of a genus and 
these two genera have been considered by Harrison as representing a well- 
marked family, the Trimenoponidae. 
Through the courtesy of the authorities of the United States National 
Museum and the Field Columbian Museum of Chicago, the present writer has 
been accorded the privilege of examining for parasites the mammal skins in 
the collections of these two institutions. Among the wealth of material thus 
discovered there have appeared three new species from South American 
mammals that are also referable to the family Trimenoponidae. In connection 
with the description of these three species, which necessitates the description 
of two new genera also, it has seemed desirable to review the family as a whole. 
The tvpes of the three new species are deposited in the collections of 
Stanford University. Paratypes of two of them, as indicated below, are 
deposited in the collections of the United States National Museum. 
In the accompanying figures the left half represents the dorsal aspect, the 
right half the ventral aspect. Owing to the fact that the male in all the species 
here described is practically identical with the female in general form and 
appearance the female only has been figured in full. 
Family Trimenoponidae Harrison. 
1915. Harrison, Parasitology, vm, 123, 124. 
1916. Harrison, Parasitology , tx, 27, 31. 
In proposing this family, Harrison (1915), in a key to the groups of the 
Amblycera based upon the respiratory system, has separated it on the basis 
of the presence of but five pairs of abdominal stigmata and the presence of a 
posterior commissure. He states further: “Of these Group A is undoubtedly 
of family rank, Trimenopon occupying a very isolated position. It shows a 
superficial resemblance to the Boopidae, but is without the accessory sac in 
