14 INSECUTOR INSCITI^ MENSTRUUS 



width as the pronotum; fastigium of the vertex smooth, 

 rounded, and twice as broad as the basal segment of the an- 

 tenna. Pronotum smooth, a httle longer than broad, an- 

 teriorly and posteriorly broadly rounded ; lateral lobes elon- 

 gate, the humeral sinus shallow but distinct. Abdomen 

 short, the last dorsal segment bent abruptly downward and 

 inward behind a bifurcated erect organ which may be the 

 supraanal plate or a genital organ (see PI. I, fig. 8)'; sub- 

 genital plate sulcate ventrally, apically bituberculate but 

 without styles ; cerci simple, cylindrical, curved upward and 

 inward, somewhat longer than indicated by the figure. Legs 

 stout ; fore and middle tibiae with four large hairy calcars 

 and a very small apical one on each ventral margin, unarmed 

 above ; hind tibiae unarmed beneath except for two short 

 chitinous tipped calcars on each side but above is armed on 

 both margins with five or six stout fixed spines in addition 

 to the apical calcars ; fore and middle femora unarmed above 

 and below, the posterior ones armed beneath on the inner 

 margin with two or three distinct but small spines, the apical 

 one larger, often a still smaller one farther toward the base, 

 and on the outer margin with six moderate spines, all spines 

 black tipped. Tegmina apically broadly rounded and about 

 three times as long as broad when spread, when folded they 

 are somewhat rolled and then appear narrower and more 

 pointed ; they barely surpass the tip of the abdomen, extend- 

 ing but a little beyond the middle of the posterior femora ; 

 wings hyaline, just barely exceeding the tegmina when 

 closed, not at all when spread ; the veins opaque. 



General color uniformly yellowish ; eyes blackish ; spines 

 of legs reddish brown for nearly the entire length, apically 

 darker. 



( $ ). — Similar to the male, the spines of the hind femora 

 a little larger; vertex blackish with conspicuous yellowish 

 ocellar spots. The cerci are short and nearly straight and 

 the ovipositor is much longer than the posterior femora, 

 apically bluntly rounded and the whole curved uniformly 

 upward. 



