1912] North American Scoliine 305 
In proportion to the rest of the insect the abdomen as a 
whole is heavy causing it to sag downward and gives the insect 
a clumsy appearance especially the female. 
First segment of the abdomen. ‘The narrow part of the first 
segment of the abdomen known as the petiole, viewed from above 
is about one-third as wide as the median segment or of the 
widest portion of this segment itself while the vertical diameter 
of this part is about two-thirds its width. It continues back- 
ward from the base of the median segment for a very short 
distance then rises sharply and gradually broadening, to a point 
about the level of the top of the median segment. It then 
bends backward to form the dorsal surface of the hinder non- 
petiolar portion of this segment. The ventral part of this 
segment is divided into two portions. The first is a small, 
convex, somewhat oblong area with rounded corners and a 
posterior median shallow notch, the whole much resembling 
in form the labrum of some Acridide. Its surface is finely and 
closely punctured and is well covered with long hair. 
The posterior portion of this sclerite is markedly triangular, 
all its margins being concaved. The posterior angles are quite 
sharp but the anterior one where it joins the front section first 
described is about the width of the petiole. The posterior 
margin has a rather dense fringe of short backward directed 
hairs. The surface of this portion of the sclerite is rather 
sparsely covered with punctures and hairs. 
A somewhat triangular projection forward and outward 
from the anterior corner of the second dorsal abdominal plate 
seems to wedge itself between the hinder corners of the notum 
and sternum of the first segment and a line arising near the base 
of the projection on the notum of the first segment and running 
obliquely downward and forward to meet the lateral margin of 
this plate at the hinder edge of the first section of the sternum 
already described may perhaps represent the former line of 
separation between the notum and pleuron in this segment: if 
so the pleuron is now the lateral margin and an actual part 
of the notum. 
Last segment of the male. The terminal segment of the male 
requires a separate description. In this sex the lateral margins 
of the dorsal sclerite overlap the corresponding margins of the 
sternal sclerite from the base of the segment backward to the 
point where a lateral spine protrudes from between the two 
