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18. TRIMEROTROPIS MARATIMA. Harr. 
Central foveola of the vertex slightly elongate; middle line seldom 
present in the female, absent in the male; open in front, and the 
margins continuous with the margins of the frontal costa. Frontal 
costa sulcate, slightly in the female, distinctly in the male. Median 
carina of the pronotum simply a raised line on the posterior lobe, 
slightly more elevated on the middle and anterior lobes, twice severed 
by transverse incisions; lateral carinae sub-distinct; disk of the posterior 
lobe flat; apex right-angled. Elytra and wings passing the abdomen; 
posterior femora about equal to it. Antennae rather longer than usual. 
Color .—An ash-gray, tinged with brownish. Face variegated with 
white, or pruinose. Pronotum sometimes striped on the sides with 
brown, especially in the male, sometimes brown throughout. Elytra 
sprinkled with minute, brownish spots, chiefly along the middle and 
lower half; dorsal margin somewhat pale, unspotted; the dorsal angle 
tinged with reddish; semi-transparent at the apex. Wings a transpar¬ 
ent yellow at base; a narrow, curved, fuscous band across the middle, 
interrupted near the front margin, where it bends in toward the 
base a short distance, but does not reach the anal angle; apical por¬ 
tion transparent. Posterior femora with two brown bands on the up¬ 
per half, inside and outside; with pale yellow ring near the apex; 
tibiae yellowish. 
Dimensions. — f —Length 1.25 inches; elytra 1.15 inches; posterior fe¬ 
mora 0.63 inch.; posterior tibiae 0.56 inch, m —Length, 0.75 to 0.9 
inch. 
This, so far as I am aware has been discovered only in the extreme 
northern part of the State. It will not be found in my list of Illi¬ 
nois Orthoptera published in Bulletin No. 1, of the Illinois Museum 
of Natural History, for the reason that I was not then aware it had 
been found in the State. 
19. MESTOBREGMA CINCTA. Thos. 
Female .—The head, seen from the side, shows the crown somewhat 
elevated, the eyes also standing high. Vertex deflexed, broad, sub-hex¬ 
agonal; the front portion prolonged; the margins continuous with the 
sides of the frontal costa. Frontal costa narrow above, gradually "ex¬ 
panding below, and sulcate throughout. Pronotum short, the length 
not exceeding the depth, strongly contracted a little in advance of 
the middle; the disk somewhat rugose, that of the posterior lobe 
nearly flat; the median carina slightly elevated on the front lobes, 
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