APPENDIX II. LOCUSTS OP WESTERN UNITED STATES. [27] 
2 $. Wiillula, Wash., September 1; Lake Point, Utah, August 14. The specimens 
•were preserved in alcohol. 
Trimerotropis fontana Thom. 
American Fork Caiion, 7,500 feet, August 5. This species is closely allied to if not 
identical with T. Juliana Scudd. 
Trimerotropis similis nov. sp. 
This species, of which only a single male was taken, at Wallula, Wash., appears to 
differ from the preceding species simply in the coloration of the wings, which are pale 
yellow at base, hyaline at apex, whore the principal nervures are brown and the 
cross- veins whitish, and are marked by a moderately narrow but distinctly defined 
blackish fuliginous baud, which follows the posterior border to the inner angle, and 
sends a shoot along the discoidal field half way to the base ; beyond it the costal edge 
is blackish nearly to the tip of the wing. 
Length of body, 18.5 mm ; of pronotum, 4.4 mm ; of tegmina, 22 mm ; of hind femora, 
9 mm . 
Trimerotropis caeruleipes nov. sp. 
Very dark brownish cinereous, sometimes with a slight hoary bloom. Lower part of 
head varying from white to livid, heavily flecked with black punctures ; frontal costa 
flat or nearly flat above the ocellus, deeply sulcate below ; fastigium flat, with sharp 
and rather elevated lateral carinae, the lateral foveolae elongate, triangular; antennae 
blackish fuscous. Front lobe of pronotum rather small tuberculate, the median 
carina sharp and rather elevated at this point, but on the granulate and rugulose 
hinder lobe sharp and slightly elevated. Tegmina marked with blackish fuscous flecks, 
which cluster into more or less distinct bands (the middle one the most distinct) at 
the end of successive quarters, the outer a little nearer the middle one, besides faint 
dusky dots which follow the principal black nervures on the apical third. Wings 
pale greenish at base, hyaline or slightly infumated at apex, where all the veins are 
black, with a narrow, arcuate, obscure, fuliginous, median, transverse belt, scarcely 
extending at all along the outer margin, shooting almost to the base of the wing below 
the costal margin, where also it is deepest in tint ; beyond it the costal margin is also 
deeply fuliginous. Hind femora grayish cinereous, with a pair of obscure dusky or 
blackish transverse belts on the outer face, most distinct above, and a blackish apex ; 
hind tibiae with the base heavily mottled with black and yellowish brown, beyond 
deep blue, the spines tipped with black. 
Length of body, J 19 mm , 9 25 ,nm ; of anteunea, <? 11.5 ram , 2 9.5 mm ; of pronotum, $ 
4.5 mm , 5 5 mm ; of tegmina, $ 21.5 mm , 2 26* m ; of hind tibiae, <J 10 mm , J 12 mm . 
1 $ . 2 $ , Portland, Oreg. ; Sissons, Cal. 
This species, which resembles T. fontana Thom. in the character of the band on the 
wings, seems to be very distinct from auy Trimerotropis heretofore described. 
Trimerotropis vinculata Scudd. PI. xvii, fig. 11. 
Sissons, Cal., Aug. 23 ; Wallula, Wash. 
Trimerotropis suffusa Scudd. 
Berkeley and Shasta District, Cal. 
Psinidia wallula nov. sp. PI. xvii, fig. 13, 14. 
Closely allied to P. sulcifrons Scudd., but with even deeper sulcatious on the head, 
and with considerably shorter organs of flight. Fusco-cinerous ; head gray from a 
mottling of minute brown and livid spots, darker on vertex, paler about the mouth; a. 
rather narrow blackish fuscous stripe runs from behind the eye over the anterior lobe 
of the pronotum, ou which it is followed beneath, on the middle of the deflected lobes, 
by a small quadrate black spot, the darker markings rather heavier in the female than 
hi the male. Fastigium of vertex deeply sulcate, closed or almost closed behind, op- 
posite the posterior half of the eye, by faint walls which curve inward and backward ; 
sides of fastigium sharply carinate, connecting directly with the frontal carinae, and in 
the female incurved next the antennae ; frontal costa very deeply sulcate, in the male 
elevated nearly to the cariuae at the extreme summit and punctate ; in both sexes the- 
frontal carinae are punctate in black. Antennae of male as long as the hind tibiae, tes- 
taceous, infuscated toward the tip. Median carina of pronotum distinct throughout, but 
scarcely cristate on anterior lobe ; disk of pronotum more or less rugulose, with a ten- 
dency to a transverse disposition of the rugae, especially on the posterior part of the an- 
terior lobe, where it is heaviest. Tegmina fusco-cinereous, the apical third partially 
diaphanous, the costal half or less with two distinct, broad, quadrate or roundish, black- 
ish bars in the middle, and in the middle of the basal half, besides brownish flecks 
along the middle of the tegmina, and scattered flecks apically — the latter having a 
tendency to follow the veins and especially to mark their tips. Wings pale citron - 
yellow at base, x>ellucid, with dark and sometimes thickened veins <".t tip, with a broacfc 
