eee 
HEMIPTERA. 187 
Euhematopinus abnormis n. sp. 
Head nearly twice as long as broad, the anterior portion narrowing to a blunt 
point and the posterior portion scarcely longer than wide—nearly quadrate, slightly 
narrowing behind. Antenne three-jointed, the first joint large, articulate with 
anterior half of head; second and third joints equal in size; the third as long as 
first and nearly twice as long as second, and having on its apical end a slight con- 
striction, which in some specimens appears almost like an indistinct joint. 
Thorax wider than long, broadened behind; sternal plate rounded in front, excised 
slightly at sides and produced behind into a strong spur, ending in a sharp point, 
which rests between the hind pair of coxe. Anterior and middle legs of the usual 
type; the middle a trifle larger than the front; the posterior pair greatly modified, 
shortened, thickened, and incurved apparently incapable of being fully extended 
and hidden from above by the margin of the abdomen, so that the insect appears to 
have but four legs instead of six. The femur and tibia are each provided with a 
stalked appendage which extends at right angles from the exterior margin and con- 
sists of a short stalk bearing a flattened, circular, disc-like structure. These discs 
may evidently be opposed to the abdomen or to the tibie# of middle legs and serve 
as clasping organs. 
Body much depressed, sides of abdomen subparallel. Length 1.40 mm., width of 
abdomen 0.65 mm. 
| Hematopinoides Oshorn. 
Antenne composed of three joints, terminal joint deeply excavated 
on the posterior side; abdominal segments at lateral margins broadly 
chitinous, with a strong tubercle and a semicircular plate above and 
below lapping over the chitinous portion of the succeeding segment. 
SUCKING LOUSE OF THE POCKET GOPHER. 
(Hematopinoides squamosus Osb.) 
Body oblong, broadly flattened; general color, dark yellowish. Head small, longer 
than broad, narrowly rounded in front, widening 
behind the antennz; lateral angles rounded, pos- 
terior margin acutely pointed beneath, with two 
large hairs set between the bases of the antenne 
and directed outward; antenne composed of but 
three joints, these being nearly equal in size, the 
first short, stout; the third longest and with a 
deep excavation on the posterior side. Thorax 
small, broader than long, margin irregular, sternal 
plate obtusely angled in front; lateral margins 
parallel, passing by obtuse angles into an acutely 
angled posterior extremity; immediately back of 
the sternal plate are two irregularly triangular 
chitinous plates, occupying the region of the meta- 
thorax and extending each side so that their bases 
reach to the bases of the coxe. Anterior and 
middle legs of nearly the same size; hind legs FG. 110.—Hematopinoidessquamosus: 
larger, stouter, and better fitted for clasping. a, female dorsal view; b, antenna; 
Abdomen large, oblong or elliptical, broadening cs EE eee Oe 
‘ ‘ : eg; J, border of abdomen—all en- 
very rapidly at base and terminating abruptly; larged (author's illustration). 
lateral margins of segments broadly chitinous, a 
strong tubercle directed posteriorly and a semicircular plate above and below lap- 
ping over the chitinous portion of the succeeding segment, spiracle located at middle 
of lateral margin; median portion membranous, appearing minutely squamous. The 
