18 
turity of the specimens. If, however, there were any doubt on this 
point a study oi the young of eurysternus gives equally conclusive testi- 
mony. In the very youngest eurysternus we have seen the chitinous 
tubercles along the sides of the abdomen inclosiug the spiracles are 
distinctly to be seen, while the head, though longer proportionately 
than in adults, is by no means equal in length to that of adult vituli. 
A young vituli found, it is true, associated with eurysternus shows this 
elongation of the head still more markedly. In color there is little dif- 
ference in the two forms, this species having rather duller colors upon 
the head and thorax. The abdomen of young specimens, when full of 
blood, appears dark red, but the bluish-gray hue is more prominent iu 
adults. The eggs of this species have not been described and we have 
not had the good fortune to discover them. The young are even more 
slender than the adults. 
The remedies that are available for the preceding species will prove 
effectual for this, and it is evidently less difficult to subjugate than that 
form. 
THE BUFFALO LOUSE. 
(Rcematopinus tuberculatus Burm.) 
This species was described by Burmeister (Gen. Ins.) under the name 
of Pediculus tuber culatus. 
It is described in GiebePs Epizoa, p. 46, and described and figured by 
Piaget (Les Pedic, p. 650, PL 53, Pig. 2). It is compared by Giebel with 
the hog-louse and by Piaget with tbe R. eurysternus, which from his 
figure it seems most nearly to resemble. According to Piaget this 
species is probably identical with the Pediculus (H.) phthiriopsis of Ger- 
vais, (Apteres, in, 306) from the Bos ca/er and with the Pediculus (R.) 
buffali of DeGeer (Mem., vn, 6S), in which case the name given by De- 
Geer should be adopted for the species. Eudow (Zeits f. d. ges Naturw., 
xxxiv, 167) describes a species under the name of Rccmatopinus punc- 
tatus, from the Bos grunniens, which possibly will be found referable to 
this same species. 
Whether the same species occurs on our American bison is not 
known, but the unfortunate extermination of this animal renders the 
question, from a practical standpoint, of little importance. Lucas de- 
scribes and figures the species in the Annales de la Societe Entom. de 
France (1852, ser. 2, torn, x, p. 531, PI. 11, No. n) referring it to the 
species described by Burmeister in 1838 in the "Genera Insectorum." 
Specimens, he says, occurred in immense numbers on a Bos bubalus in 
the Museum of Natural History. 
THE HOG-LOUSE. 
(Rccmatopinus urius Nitzsch.) 
Occasionally this species appears in formidable numbers, since we 
often hear of swine badly affected with lice, and no other species is 
known to attack this animal. 
