1912] North American Scoliine 309 
except near its base where it shows a few punctures and hairs. 
Beneath the base of each wing there is only one principal long 
narrow plate, called the subalar by Crampton in a treatise on 
the thorax of insects in 1909. Above the base of each, just 
behind the tegulz are located two plates which probably repre- 
sent detached portions of the basal parts of the veins of the 
wings. 
LeGs. The legs of this subfamily are not long but are 
stoutly built, the general structure being reenforced by spines 
and hairs of unusual length and thickness especially in the 
female. The front legs of the female are especially developed 
probably to aid in digging in the earth. 
The coxa, trochanter and femur of the front leg have no 
Spines in either sex. The femur of the middle leg in the female 
however bears on the outer side of its outer end, one or some- 
times two small spines and at the same place on the hind femur 
a transverse row of similar spines. In the male the mid femur 
has, in rare cases, such a spine at the above location and the 
posterior femur always bears a row of short spines at the same 
place. The other segments of the legs are more or less covered 
with rows or else isolated stout spines especially in the female. 
The front legs in both sexes are always the shortest and the 
parts beyond the femur in the female are somewhat flattened. 
The size and length of the legs increases from in front backward 
and the length of the first tarsal segment in the three pairs of 
tarsi from front to rear is very nearly in a ratio of one, two and 
four in both sexes. 
In the front leg the tibia is much shorter than the femur; in 
the middle leg it is but little shorter; while in the hind leg the 
two segments are about equal in length. 
The mid coxe are always far apart, (a character used to 
separate the Scoliidz from the other closely allied families) and 
are small globular or subconical in form. The fore and hind 
coxe are quite large, of about the same size and conical. The 
former are contiguous but the latter are widely separated. 
At the top of the last tarsal segment is a pair of simple claws, 
(a character used to separate Scoliide from the Myzinide). 
Between these claws is a good sized pulvillus. 
At the end of the tibia there are always several spines and 
at the end of the middle tibia is always a spine much larger and 
longer than the others, while at the end of the hind tibia there 
