322 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 
THE HEAD. 
CEcantlius niveiis 9 . — The head is long and narrow. The suture be- 
tween the post- and anteclypeus is obsolete in the middle. The occip- 
ital and gular regions are much developed, while the genie are narrow. 
THE THORAX. 
Notum. 
The pronotum is long and narrow. 
The mesonotum is very short; the scutum almost wanting, very short, 
while the scutellum is about one-third as long as wide. 
The metanotum is a little longer than wide; the scutum is shorter than 
broad, slightly swollen on each side; the scutellum is one-half as long 
as the scutum, unusually broad, regularly convex, very obtusely angu- 
lar behind, succeeded by a thin, transverse ridge, which is perhaps the 
postscutellum. 
Pleurum. 
The propleurum is minute and rudimentary. 
The mesopleurmn is very short and oblique; the episternum is a long 
oblong sclerite which is moderately broad, while the epimermn is very 
narrow, but as long as the episternum. 
The metapleurum is also very oblique, but the two sclerites are of the 
same width, and both are somewhat broader and larger than the mes- 
episterna. 
Sternum. 
All the sternites are broad and full, as indicated in Fig. , so that the 
coxa) are wide apart. 
THE ABDOMEN. 
There are eleven uromeres; eleven tergites, and eight urosternites. 
The cercopoda are long, multiarticulate, while the ovipositor is large, 
long, and well developed. 
4 1 \* Uv w i 
Remarks . — Tlys faipily is evidently closely allied to the Locustariie, 
while the Xcrydii ana Phasmida are closely allied, the Mantidm standing 
below next to the lowest group, the Blattarise. 
Order IV. PSELDONEUROPTEKA. 
Suborder 1 . Coiirodentia. 
TERLiDiE. Plates XL, XLIV, LVII. 
THE HEAD. 
Pteronarcijs californica. (PI. XL, figs. 1-2.) No occiput. Epicranium 
divided into three regions; vertex large and well marked, about one- 
