84 ORTHOPTEROUS GROUP INSARAE 



the present species the fastigial suture is straight,, transverse; eyes much as 

 in prasina but less prominent. Pronotum with dorsal length about twice 

 the greatest (caudal) dorsal width; dorsum of pronotum very slightly de- 

 pressed within the margins; lateral carinae of dorsum of pronotum parallel 

 in the cephalic half and very slightly sinuate, moderately arcuate-divergent 

 in caudal half, the point of least width mesad; cephalic margin of dorsum of 

 pronotum almost straight, a very shallow angulate emargination indicated; 

 caudal margin of same very broadly arcuate ; lateral lobes of pronotum with 

 length one and one-half times the depth, the ventro-cephalic angle sharply 

 angulate at slightly more than ninety degrees, the ventro-caudal angle 

 broadly rounded, caudal margin arcuate, the humeral sinus indicated only 

 by a very slight sinuation. Tegmina abbreviate, about three-fifths the 

 length of the caudal femora, broad in proportion to length, narrowing with 

 a very slight and even convexity from point of greatest width at caudal 

 margin of tympanum to the rather sharply rounded apex; marginal field 

 of tegmina broad in proportion to tegminal width. Disto-dorsal segment 

 of abdomen truncate caudad with a very slight medio-longitudinal de- 

 pression;^^ cerci rather long and more slender than in other species pe- 

 culiar to Mexico, slightly incurved, this curvature more pronounced near 

 base and apex, tapering rather sharply for one-third the length, then uni- 

 form to apex which is suddenly and considerably flattened above and armed 

 with a tooth the end of which is slightly hooked, this tooth directed meso- 

 dorsad at almost a right-angle; subgenital plate short and narrow, lateral 

 margins slightly convergent distad, distal extremity produced mesad and 

 laterad in short distinct knobs, the median protuberance slightly the great- 

 er, the caudal margin of the plate being in consequence angularly brace- 

 shaped in general outline. Cephalic'*^ limbs slender, the cephalic femora 

 carinate dorso-distad for a very short distance with distal margin of same 

 rather sharply acute-angulate and genicular lobes bearing a supplementary 

 spine, ventral margins of cephalic femora unarmed; cephalic tibiae some- 

 what swollen, narrowing gradually below tympanum, ^^ which organ is 

 apert. Caudal femora mildly bullate proximad for a distance a little 

 more than half their length, genicular lobes triangular, dentiform, but 

 with blunt apices. 



As the female of this species is known from the type alone, we 

 learn from Brunner's original description only that the size of that 

 sex is somewhat smaller than that of the male, that the length of 

 the pronotum and tegmina is greater, and that the pronotal length 

 is equal to that of the ovipositor. No mention is made of the sub- 



" The supra-anal plate is invisible in this specimen. 



" The median limbs are missing in the specimen before us. 



" This character agrees perfectly with that found in the northern species 

 of the genus and may be used to separate readily this species from all other 

 known forms peculiar to Mexico. 



