194 ENTOMOLOGICAL NEWS [May, 14 
utterly unrecognizable from this description. The taking of 
two score specimens of Mallophaga last January and June 
(1913) by Dr. C. H. T. Townsend, government entomologist 
of Peru, from three vizcachas shot at Ninahuanchi, Peru (alt. 
13,000 ft.), and one shot at Cerro Picuna, Peru (alt. 8,000 
ft.), allows us to make some definite records of the ectopara- 
sites of this interesting rodent. 
The specimens from the vizcachas kindly sent us by Dr. 
Townsend represent several Mallophagan species, of which 
two, both new (in the face of the impossibility of recognizing 
Gay’s vizcachan Gyropus) are undoubtedly peculiar to the 
vizcacha. For one of these species it is necessary to establish 
a new genus. In addition, the material, credited to the viz- 
cacha, included two additional species, undoubtedly abnormal 
stragglers (in game bag or on the skinning table), one of them 
being the common Lipeurus baculus of doves, and the other a 
Goniodes which may have straggled either from doves or 
pheasants. Dr. Townsend writes us that his Indian collectors 
do frequently kill doves on their collecting trips, and that, 
despite his careful instructions, they may well allow their 
specimens to become too neighborly with each other in the 
game bag. 
Of the two new species, one is a Gyropus, while the other, 
as said, plainly represents a new genus, a two-clawed form— 
the typical mammal-infesting Mallophaga are one-clawed—of 
a general appearance rather like that of Menopon or Trinoton 
(both bird-infesting genera). Although, as just suggested, 
most of the mammal-infesting Mallophaga are one-clawed 
species, belonging to the two genera Gyropus and Trichodectes 
(to this latter single genus belongs a considerable majority of 
all Mallophagan species so far recorded from mammals) a few 
two-clawed species, representing three of four genera, have 
been taken from mammals. Especially are these two-clawed 
species found on marsupials. Also, for almost each of these 
species a new genus has had to be established. These two 
special conditions of their occurrence give them a particular 
interest to students of Mallophaga. 
