410 FAMILY VI. ACRIDIDJE. THE LOCUSTS. 



d. Furcula either minute triangular processes or flat, tapering 

 and distinctly less than half the length of supra-anal plate; 

 cerci narrowing but little in apical half; subgenital plate of 

 male nearly as broad at apex as at base, the apex more or 

 less elevated above the lateral margins. 

 e. Furcula shorter than last dorsal segment to which they are 



attached (PI. Ill, ;.) 



f. Supra-anal plate without a transverse carina, its sides 

 straight, and median sulcus confined to basal half; apex 

 of subgenital plate slightly elevated and terminating in 

 a small subapical tubercle. SERIES X, p. 417. 



ff. Supra-anal plate with a transverse carina at apical third, 

 its sides sinuous, and median sulcus percurrent; apex 

 of subgenital plate not elevated into a tubercle. 



FASCIATUS. 53 



ee. Furcula nearly half the length of supra-anal plate. 



DAWSONI. 58 



dd. Furcula slender, tapering, subcylindrical, half or more as 

 long as supra-anal plate; cerci subfalcate, the apical half 

 usually distinctly narrowing, the upper angle of tip pro- 

 longed (PI. IV, fc, Z) ; subgenital plate of male distinctly 

 narrower at apex than at base, the apical margin not ele- 

 vated nor notched or tuberculate. SERIES XI, p. 418. 

 l)b. Cerci of male with apical half more or less expanded so as to be 

 distinctly broader at some point beyond the middle than at the 

 middle (PI. IV, m. r.) 



g. Cerci of male spatulate or subspatulate, the apex rounded and 

 entire, the outer face of apical third concave; furcula always 

 distinct. 



h. Supra-anal plate at apical third suddenly and strongly nar- 

 rowed or constricted; furcula not strongly diverging, one- 

 third or more the length of supra-anal plate; subgenital 

 plate with apical hind margin subtruncate, vaguely and 

 widely emarginate (PI. IV. ???.) SERIES XII, p. 425. 



Till. Supra-anal plate with apical third gradually narrowed and 

 depressed ; furcula very strongly divergent, not over one- 

 fourth the length of supra-anal plate (Fig. 145, Z>) ; sub- 

 genital plate not apically subtruncate nor vaguely emar- 

 ginate. SERIES XIII, p. 428. 

 gg. Cerci of male distinctly forked or their ventral margin with a 

 submedian process or angle, or else expanded so as to be very 

 much broader at tip than at base (PI. IV, o, q) ; furcula 

 usually wanting or minute. 



i. Tegmina without distinct rounded fuscous spots scattered ir- 

 regularly over the surface; interval between mesosternal 

 lobes of male distinctly longer than broad. 



j. Size medium or small, the males rarely over 25 mm. in 

 length ; cerci either always forked or their ventral mar- 



5S These two species are normally short-winged and have been treated under Division 

 I, pp. 4oo and 393. Their insertion here is only to cover the very rare long-winged 

 individuals. 



