256 PSYCHE. [September .S9S. 



less than head plus pronotum, of male a little longer proportionally. 



Small, 16 to 24 mm. Cerci of male straight, tapering evenly to a 



sharp, conical point. . . Sp. 34, Hesperotettix brevipennis. 



FF. Not as above : coloration usually dull, chiefly brownish or oliva- 

 ceous, the tegmina invariably so. 



G. Hind tibiae bright greenish blue. Hind femora not trans- 

 versely banded, slender, of male about 12 mm., of female about 

 16 mm. long. Tegmina fully developed, at least double the 

 length of the pronotum, not spotted or streaked. Body slender, 

 eyes noticeably prominent. Antennae very long, of male twice, 

 of female distinctly more than once, as long as head plus pro- 

 notum. Mid-carina of pronotum distinct, equally developed 

 throughout. Prosternal spine long, tapering, sharply pointed. 

 Cerci of male nearly symmetrical, slender, the tips a little 

 e.xpanded, and incurved, caliper-like. Sp. 46, Paroxya floridana. 



GG. Not as above Melanoplus. 



Key to species of Melanoplus — Males. 



I. Tegmina no longer or scarcely longer than pronotum.* 



2. Cerci slender, clasp-like, four times as long as their middle breadth 

 (Fig. 38). Furcula well-developed but short (Fig. 38c). Mid-carina of 

 pronotum indistinct on prozona ..... M. tnanats. 



2'. Cerci broad, sub-triangular, less than three times as long as the middle 

 breadth (Fig. 37). Furcula usually very short. Mid-carina of pronotum 

 distinct throughout ....... M. scudderi. 



i'. Tegmina much longer than pronotum. 



3. Subgenital plate with apical margin conspicuously notched (Fig. 36b). 

 Tegmina equalling or passing the hind femora. Cerci subtrapezoidal, 

 about twice as long as broad (Fig. 36). .... J/. aHanis. 



3'. Subgenital plate not conspicuously notched. 



4. Cerci distinctly forked, the lower branch narrower (Fig. 43). Af. collinus. 

 4' (4"). Cerci of irregular shape or very unequal width. 



5. Cerci with apical two-fifths suddenly narrowed on ventral side to 

 nearly one-half the width of basal three-fifths (Fig. 42). M. minor. 

 S'. Cerci broadly expanded apically. 



*Mel. islandicm Blatch. (Psyche, April 1898, p. 196 = M. abortivm E. M. Walker, Can. Ent., April 189S, p. 90), found 

 in the vicinity of Toronto, Canada, resembles mancvs, especially the female. The male may be readily separated from 

 manats by the cerci which are shorter, but little longer than their width at base, with sides tapering evenly to a flattened, 

 very slightly expanded tip. This species may possibly occur in the St. Lawrence basin within our boundaries. 



