320 PROCEEDINGS OF THE NATIONAL MUSEUM. 



genae; antennae pale rufous or dark olivaceous, apically infuscated, 

 two-thirds (male) or scarcely more tban half (female) as long as the 

 hind femora. Prouotum feebly (male) or gently (female) enlarging 

 posteriorly, olivaceous green, more or less infuscated in the male, with 

 a broad greenish-fuscous (female) or brownish-fuscous (male) postocular 

 band confined to the prozona, the lateral carinae above it sometimes 

 marked with dull flavous; disk nearly plane but subtectate, passing by 

 an abrupt but rounded augulatiou, forming distinct percurrent lateral 

 carinae, into the slightly tumid but otherwise vertical lateral lobes; 

 median carina distinct, sharp, equal, percurrent 5 front margin sub- 

 truncate, hind margin very obtusaugulate, sometimes rotundato obtus- 

 angulate; prozona longitudinal (male) or longitudinally subquadrate 

 (female), but little longer than the densely but shallowly punctate 

 metazona. Prosternal spine very long, cylindrical or feebly conical, 

 blunt, somewhat retrorse; interspace between mesosterual lobes more 

 than half as long again as broad (male) or transversely subquadrate 

 (female). Tegmina abbreviate, about as long as the prouotum, over- 

 lapping, short lanceolate, subacumiuate and brownish fuscous (male) 

 or green more or less suffused with fusco-ferruginous (female). Fore 

 and middle femora considerably tumid in the male; hind femora green 

 (female) or brownish fuscous (male), the outer face more or less ferru- 

 ginous (female) or testaceous (male), the under surface sanguineous and 

 the genicular arc black; hind tibiae green, in the male more or less 

 infuscated, apically growing very pale ferruginous, the spines pallid, 

 black-tipped, ten to twelve in number in the outer series. Extremity 

 of male abdomen clavate, considerably recurved, the supraanal plate 

 triangular, acutangulate at apex, the lateral margins and the sharp 

 submedian ridges equally and feebly elevated, forming between them 

 a broad shallow sulcus, the median sulcus moderately broad, percurrent, 

 not very deep; furcula consisting of a pair of slight approximate tri- 

 angular denticulations; cerci large, stout, fully twice as long as broad, 

 much narrowed in the middle by the strong arcuation of the upper 

 margin, apically expanded into a subtriangular lobe, the whole nearly 

 straight but slightly upcurved as seen from the side, sinuate as seen 

 from above (though not so strongly as represented in the figure), being 

 first curved inward and then slightly outward; subgenital plate sub- 

 conical, the sides not vertical but inclined inward so that the free mar- 

 gins unite in an acute angle, while at the same time the apex is pro- 

 duced and elevated to form a conical marginal tubercle. 



Length of body, male, 17.5 mm., female, 22 mm. ; antennae, male and 

 female, 6.75 mm.; tegmina, male, 6 mm., female, 6.25 mm. ; hind femora, 

 male, 10.5 mrn., female, 13 mm. 



Two males, 2 females. City of Mexico, Mexico, November, L. Bruner ; 

 Queretaro, Mexico, November (L. Bruner;. 



