Mies ee 
Ne 
186 INSECTS AFFECTING DOMESTIC ANIMALS. 
Although we have not seen Middendorf’s description and figure of H. 
leviusculus from Spermophilus eversmanni, there can be scarcely a possi- 
bility of this being identical with it, since this differs in almost every 
particular as compared with the diagnoses of that species given by 
Giebel and by Piaget. We therefore describe it without hesitation as a 
new species. 
It has been found plentiful on Seemann Sranklini and S. 13-line- 
atus at Ames, Iowa. An immature specimen from Tamias striatus pre- 
sents the characters of the species so plainly that there can be little 
doubt that it is identical. 
Hematopinus erraticus n.sp. 
Approaches Hamatopinus hesperomydis. Abdomen broad, middle and hind legs 
larger than front. Sternal plate circular incised at sides behind and produced 
medially. Head nearly as broad as long, rostrum slightly produced. Antenne 
large, first joint thick, second longest. Fore legs rather small, middle legs consid- 
erably larger, hind legs largest. All tibiz widened, front tarsal claw sharp, 
middle and hind claws broad, flat. Sternal plate rather wide, circular in front, 
slightly sinuate at sides, excised behind for insertion of posterior coxe. Median 
portion produced, subtruncate, reaching about halfway between hind cox. Abdo- 
men broad, lateral margins rather broadly corneous, disk with stiff hairs. 
From “ Larus bonapartii” in the Burnett collection. This reference 
seems very doubtful as the actual host of the species, and I suspect 
that it was taken from the gull after contact with some other animal 
na game bag or otherwise. It seems to come most nearly to the type 
infesting rodents and family Muridx, and I would predict that the 
species will be found on some mammal, probably a rodent. If actually 
parasitic on Larus it is a remarkable exception to the rule for Pedicu- 
lide and should be regarded, I think, as a form, but recently estab- 
lished on an avian host and derived from a mammal-infesting species. 
A REMARKABLE PEDICULID PARASITE OF THE MOLE. 
While these pages have been passing through the press, I have 
encountered upon a mole, Scalops argentatus, collected at Ames, lowa, a 
very peculiar species of pediculid, and in order to bring it to notice 
in connection with the other species described here, I give a brief diag- 
nosis of its distinctive features. It differs so decidedly from typical 
species of Hematopinus in characters given generic value that it will 
have to be placed in a new genus or else form a subgenus and the 
characters of Hzmatopinus be enlarged. I will call it Euhzematopinus 
nov. gen. 
Antenne three-jointed ; posterior pair of legs greatly modified and bearing on the 
femora and tibiw stalked, disc-shaped appendages, projecting at right angles from 
these parts. 
1 After the above paragraph was written I found slides of the same species from 
Pteromys volucella, where it was mounted with one female specimen of H. sciuropteri, 
wil also specimeas from Arvicola pennsylvanica and Sciurus striatus. 
