NO. 1124. REVISION OF THE MELANOPLI-SCUDDER. 301 



apical third as parallel, cylindrical but tapering, acuminate needles, 

 reaching to the distal end of the middle third of the supraanal plate; 

 cerci slender feebly compressed laminae, rapidly narrowing on basal 

 third, the middle third equal, hardly compressed and half as broad as- 

 extreme base, then expanding to a nearly equal extent to form a corn- 

 pressed, spatulate, incurved tip, the apical portion of which is very 

 strongly compressed and not in<urved; infracercal plates broadly- 

 rounded apically, as long as the supraanal plate; subgenital plate mod- 

 erately broad, subequal in breadth, considerably longer than broad, 

 feebly flaring, the apical margin very broadly and feebly elevated, well 

 rounded but feebly angulate, entire. 



Length of body, male, 25 mm., female, 28 mm.; antennae, male, 12.5 

 inm.; tegmina, male, 19? mm., female, 21 mm.; hind femora, male, 12.75 

 mm., female, 14.25 mm. 



One male, 1 female. Grand Canyon of the Colorado, Arizona, July 

 10 (L. Bruner). 



This species is rather closely allied to the last, M. complanatipes, but 

 is easily distinguished from it by its less strongly compressed hind 

 femora with their bifasciate markings. The differences in the abdom- 

 inal appendages are slight, but are found at every point. 



21. ANGUSTIPENNIS SERIES. 



A very homogeneous group (and one very closely allied to the pre- 

 ceding), in which the prozona of the male is variable, and the interval 

 between the mesosternal lobes in the same sex varies from a little 

 longer to several times longer than broad. The tegmina are always 

 fully developed and reach or somewhat surpass the tips of the hind 

 femora. The hind tibiae are red or glaucous and have from nine to 

 thirteen spines in the outer series. 



The supraaual plate is long and rounded triangular, and preapically 

 contracted somewhat conspicuously. The furcula consists of a pair of 

 slender, tapering, acuminate fingers of considerable length, generally 

 extending over a third of the supraanal plate. The cerci are rather 

 short and rather slender, incurved or inbent apically, spatulate, not 

 nearly reaching the tip of the supraanal plate. The subgenital plate is 

 large, fully as broad as long, not or but little elevated apically and 

 there usually feebly notched. 



The species, only four in number, are of medium or rather small, 

 occasionally rather large size, and occur from Iowa to Utah, and from 

 Montana and Manitoba to Texas, though one species ranges as far east 

 as Sudbury, Ontario the only one found east of the Mississippi. They 

 occur mostly in the region between the Rocky Mountains and the Mis- 

 sissippi. 



