34:2 FAMILY VI. ACRIDIDJE. THE LOCUSTS. 



much narrower, female, sulcate only below the antennae, its sides often 

 evanescent below the ocellus. Pronotum short, subcylindrical, its median 

 carina evident but very low, cut by three transverse sulci, male, by only 

 the hind one, female, these sulci deep on the lateral lobes, the front one 

 short; prozona with front margin feebly rounded, slightly emarginate; 

 metazona faintly punctate, its hind margin truncate, very broadly and 

 feebly emarginate. Front and middle femora short and swollen in male; 

 hind ones slender, slightly surpassing abdomen, male, reaching base of 

 ovipositor, female. Supra-anal plate of male long, triangular, acute at tip, 

 its side somewhat sinuous, feebly elevated, its median sulcus deep, entire. 

 Furcula consisting of a pair of slender, cylindrical subparallel projections, 

 overlying the basal fifths of the median ridges. Cerci stout, erect, black, 

 and but feebly tapering above the broad basal third, their tips oblique. 

 Subgenital plate one-half longer than the preceding segment, its upper 

 margin broadly rounded, truncate, but with a slight median notch, the tu- 

 bercle broad, prominent and borne distinctly below the margin of the plate. 

 Length of body, $, 15 17.5, 9, 1928; of antennae, $, 89.2, 9, 79; 

 of head and pronotum, $ , 5.5 5.8, 9, G.3 7; of hind femora, $ , 9 10.8, 

 9 , 10 12 mm. 



This, the typical form of our eastern Podisma, is mainly a 

 snbalpine species, known only on the higher mountains of New 

 England, the Adirondacks and Oatskills of New York, and on 



~ 



one or two of the higher peaks of eastern Pennsylvania. It is also 

 recorded by Walker (1915) from Trice Edward's Island and St. 

 Fabien, Quebec. Scudder (1808c, 12) says: "More than 35 years 

 ago, as I used to climb the footpath to Mt. Washington from the 

 Peabody Valley, one of the first creatures to meet my eye as I 

 emerged above the forest at the Ledge would be this wingless 

 grasshopper, then first found in the clumps of dwarf birch, Bctiilti 

 nana L. Since then I have taken it many times at various points 

 in the lower or subalpine portion of the barren summits of the 

 Great Range, and it has also elsewhere been taken below the for- 

 est line." Morse (1808, 273) says that most of his specimens 

 "were found on or among the various species of Yacciniiiin char- 

 acteristic of the mountain tops and on Mt. Ascutney among dwarf 

 cornel. It is a somewhat sluggish insect, relying chiefly for pro- 

 tection upon the similarity of its dark olive-green coloring to that 

 of the surrounding vegetation, though on warm days the males 

 become fairly active." 



151a. PODISMA CLACIALIS CAXADEXSIS E. M. Walker, 1903, 300. Northern 



Wingless Locust. 



Differs from glacialis mainly by the characters given in key. Color 

 nearly, the same, the inner and lower faces of hind femora often yellow 

 instead of coral-red. Eyes of male slightly more prominent, the interocu- 

 lar space and fastigium in front of eyes slightly wider. Cerci of male about 

 half as broad at middle as at base. Length of body, $ , 15 18, 9 , 20 



