Fe\, 1905.] 
Kerthra stygica. 
289 
beyond the costal margin ; extending beyond the end of the abdo- 
men. First pair of legs raptorial. Anterior femorae incrassate, 
flattened anteriorly and coming to a point (Fig. 2); coarsely 
granulate; tarsal claws single. Intermediate and posterior 
pedes cursorial ; femoras normal with a row of blunt teeth ; tibiae 
with two rows of stout spines with a sulcus between ; tarsi one- 
jointed in intermediate j)edes and provided with double claws 
(tarsi of posteriors lost in the specimen before me). Mesosternal 
tubercle rather acute and laterally somewhat flattened, ter- 
minated by bristles. Male abdominal segments much com- 
pressed in the middle to give room for the large and prominent 
genital segments which are deflected toward the right. Abdomen 
rounded with an entire margin. 
Color, blackish-brown above, except the flattened prothoracic 
and hemelytral lobes which are yellowish and translucent. 
Underside of the abdomen more or less black. First pair of legs 
entirel}^ black ; second and third more or less spotted with 
lighter color. 
Dimensions: Insect — Long., 7.4 mm.; lat., 5.3 mm. Head 
including eyes — Long., .0 mm. ; lat., 3.4 mm. Prothorax — Long., 
2.4 mm.; lat., 5 mm. Abdomen — Long., 4.4 mm.; lat., 5.3 mm. 
Redescribed from a single specimen in the collection of Mrs. 
Annie Trumluill Slosson who took it in Florida. 
The much roughened upper surface together with the entirely 
coriaceous hemelytra fused into one will at once distinguish this 
species from all the other Mononychinae. 
The preceding descriptions will doubtless be found lacking in 
many respects but dissection being necessary to determine cer- 
tain anatomical features and characters, such, for instance, as 
the antennae, the possession of only one specimen, and that not 
my own, has made it impossible to supply what is missing. 
As Say’s description is not accessible to all, I give it hereafter 
taking it from the Le Conte edition. 
“N. stygica — Black, front quadrilineate. 
‘‘Inhabits Georgia. 
“Body oval, brown-black, rather rough; head crenate on the 
front so as to form four denticulations ; eyes rounded, rather 
prominent; thorax not emarginate before, with a slightly de- 
pressed margin behind; anterior thighs dilated triangualr; 
hemelytra with oblique lines; they appear united at the suture. 
“Length three-tenths of an inch. 
‘ ‘I have but one mutilated specimen which was sent to me by 
Mr. Oemler. If I am not deceived by this specimen, the species 
is apterous and the hemelytra are united bv a rectilinear suture, 
which will require the formation of a separate genus which may 
be named Nerthra.” 
