HEMIPTERA. 177 
nous plates and devoid of any tubercles along the sides; the terminal 
segment is also devoid of a black horny band; the brush-like organ on 
the under side of the abdomen (see fig. 101) is slender, while the terminal 
segment is set with numerous rather long hairs. 
In all of these points it will be observed there is a distinct difference 
from eurysternus. The brush-like organ on under surface of the abdo- 
men, common to the adult females of related 
species and which is wanting in young speci- 
mens of all species, must be taken as distinct 
evidence of the maturity of the specimens: 
If, however, there were any doubt on this 
point a study of the young of eurysternus 
gives equally conclusive testimony. In the 
very youngest eurysternus, the chitinous 
tubercles along the sides of the abdomen 
inclosing the spiracles are distinctly to be 
seen, while the head, though longer propor- 
tionately than in adults, is by no means equal 
in length to that of adult vituli. A young 
vituli, found, it is true, associated with eurys- 
Fig. 101.— Hematopinus vituli: 
female, under surface of last 
ternus, Shows this elongation of the head still segments of abdomen of same, 
showing brush-like organs—en- 
more markedly. In color there is little dif- ered (cnitfing's hmabenGal 
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, apyears dark red, but the bluish-gray 
hue is more prominent in 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. 
(Hematopinus tuberculatus Burm.) 
This species was described by Burmeister (Gen. Ins.) under the name 
of Pediculus tuberculatus. 
It is described in Giebel’s Epizoa, page 46, and described and figured 
by Piaget (Les Pédic., p. 650, pl. 53, fig. 2). It is compared by Giebel 
with the hog louse and by Piaget with the H. 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 
Gervais (Aptéres, ILI, 306) from the Bos cafer and with the Pediculus 
(H.) buffali of DeGeer (Mem., VII, 68), in which case the name given 
by DeGeer should be adopted for the species. Rudow (Zeits. f. d. ges. 
Naturw., X X XIV, 167) describes a species under the name of Hamato- 
pinus punctatus, from the Bos grunniens, which possibly will be found 
referable to this same species. 
4653—No. 5 12 
