1864.] 
553 
than broad, covering a large part of the base of the tegmina, and of a 
very thin, scale-like consistence; color dull clay-yellow, the anterior 
lobe brassy-black (omitting the anterior margin and the anterior por¬ 
tion of the sides, which are whitish-yellow) and this color extends in a 
broad continuation each side, obliquely backwards; an elongate oval 
impression upon the disk before the middle is also black; the posterior 
lobe flat above, and densely longitudinally wrinkled; anterior angles 
sub-rect, the posterior margin broadly rounded. Tegmina pale brown 
above, yellow at sides, becoming almost white upon the costal margin, 
the neuration reddish-brown, very dense and ramose. Abdomen more 
or less invaded with black above and upon the sides and behind, the 
two rows of lateral stigmata black; venter rufous, with a row of black 
points each side; anal and genital appendages very complex, the cerci 
compressed, reflexed at tips, between these is a large triangular, hilo- 
bate prominence, with an acuminate process on each lobe, each side 
below this is a spatulate appendage, curved inwardly, beneath these on 
the middle is a pointed keel-like elevation, projected backwards upon 
the segment, grooved and emarginated at tip; the elevated segment 
upon which the two lower appendages are placed is emarginated in the 
middle and has a small lobe each side of the emargination. Pectus 
black, spots above the coxae, and the coxae and trochanters in part yel¬ 
low. Legs yellow, polished, striped and marked with black within and 
without; the two anterior pairs of femora faintly sulcated on both faces, 
the posterior femora sulcated on the exterior face, the underside with 
a Carina upon edges, the intermediate tibiae faintly and the posterior 
pair within and without distinctly grooved. 
Length to tip of abdomen 16, and 22 millims. Breadth of thorax 
posteriorly 7, and 9 millims. Posterior femur 8| and 12 millims. % . 
ffab. Oregon Territory (Dr. Suckley.) 
The specimens examined were two males kindly presented to me by 
Mr. Henry Ulke. The anterior legs are proportionately more devel¬ 
oped, in comparison with the posterior ones, than is the case in any of 
the allied forms yet described from this country. 
ACRIDIODEA. 
STENOBOTHEUS, Fischer. 
S. admirabilis. 
Bright grass-green; labrum green, carneous at sides and white in 
