SUBFAMILY III. LOCUSTIN.E. 423 



ing ridges thence elevated and convergent to apex, the sulcus therefore 

 spear-shaped in outline. Furcula cylindrical, strictly parallel, equal, fin- 

 ger-like projections lying on the crests of the basal halves of the median 

 ridges. Cerci broad, slightly falcate, shorter than supra-anal plate, their 

 dorsal margin broadly concave, ventral one curved gradually into the blunt 

 rounded or slightly produced apex (PI. IV, 7.) Subgenital plate scoop- 

 shaped, longer than broad, its apical margin broadly rounded, not elevated. 

 Pallium elevated above the floor of the subgenital cavity as an oblong 

 hood-shaped tubercle. Length of body, $, 1519, 9, 1724; of antennae, 

 $ t S 9, ; 68; of pronotum, $, 4 5, $, 5 5.3; of tegmina, $, 1016, 

 g t 9.518; of hind femora, $, 9.512, $, 11 12.5 mm. 



After carefully studying- typical specimens of M. Itorcalls from 

 Ft. Rae, MacKenzie, Can. (Fribble), in my collection and from 

 Rama, Nain and Hopedale, Labrador, in the E. M. Walker and 

 Scudder collections, and comparing- them with what has hitherto 

 been called If. e.rtremus (F. Walker) from New England and 

 Northern Indiana, T have no hesitancy in combining the two forms 

 under Fieber's name. The southern individuals (e.rtrcntus) aver- 

 age a little smaller in size, are mostly of a paler general hue, have 

 the tegmina usually shorter, the median carina of pronotum often 

 subobsolete on a portion of the prozona and the prosternal spine 

 somewhat shorter and stouter, but in the genital characters of 

 the male and otherwise they agree with borenlis in all particulars. 



This, the I/, e.rt remit ft of my former work (1903, 319) first 

 came to my notice in Indiana on August 0, 1897, when it was 

 found near DeLong, Fulton County, in an open peat bog which 

 was surrounded on all sides by a heavy growth of tamarack, Lnri.r 

 (tmericaiKi Michx. But about a dozen specimens were secured, all 

 of which were of the short-winged form. When disturbed they 

 gave several short, quick leaps, and then burrowed as far as they 

 could into the dense mass of sphagnum moss which everywhere 

 covered the bog. It has since been taken several times in the 

 same place; also in a marsh near the south end of Lake Maxin- 

 kuckee ; and probably occurs about the most of the peat bogs and 

 marshes of the northern third of the State. 



As its specific name indicates, the known range of typical M. 

 borculis is northern, extending from Labrador, Nova Scotia, Hud- 

 son Hay and Greenland, north and west to Alaska and south and 

 west to northern Massachusetts, northern Indiana and Illinois, 

 Nebraska and Wyoming. Fieber's types of boreal is were from 

 Greenland, while those of Walker's c.rtremus were from "Arctic 

 America." Scudder's Labrador specimens were taken in August 

 from the banks of a mountain brook. They were most abundant 

 where the low shrubby vegetation was most luxuriant between 200 



