MORGAN HEBARD 305 



very broadly convex except mesad where a slightly stronger convexity is shown ; 

 lateral angles only slightly caudad of mesal point, broadly rounded. Tegmina 

 broad; fully developed, extending beyond cereal apices a distance equal to 

 the cereal length. Dorsal surface of abdomen with sixth segment showing a 

 strong and sudden median depression, its cephalic margin strongly convex, 

 from the caudal margin spring two rounded ridges, approximate, slightly con- 

 cave, converging cephalad, with their apex supplied with a tuft of agglutinated 

 hairs, these occupying the mesal portion of the depression; latero-caudal angles 

 of segment slightly produced, subrectangulate, with apex sharply rounded; 

 seventh and eighth segments briefly exposed, transversely decidedly narrower 

 than sixth. Supra-anal plate briefly triangularly produced, with apex rounded ; 

 length about one-fourth basal width. Cerci elongate, slender; dorsal surface 

 flattened, weakly convex proximad; joints (thirteen) with lateral margins almost 

 straight to near caudal margin, but decreasing rapidly in individual size meso- 

 distad to the acute apex; ventral surface of each joint decidedly convex, 

 lateral margins rather broadly lamellate, particularly the external margins. 

 Concealed genitalia very complex.' Subgenital plate very small, convex, the 

 meso-distal third occupied by large, elongate, irregularly rounded, attingent 

 styles, directed dorso-caudad, with broad apices rounded; beneath and cover- 

 ing the internal portion of the bases of the styles, the median portion of the 

 free margin of the plate is triangularly produced. Limbs elongate and slender. 

 Venation, limb armament, tarsi and arolia discussed in generic description. 



Allotype. — 9 ; Santa Lucrecia, Vera Cruz, Mexico. (F. Knab.) 

 [United States National Museum.] 



This sex agrees closely with the male, but has the pronotum slightly longer, 

 while the tegmina and wings show slight reduction, reaching only slightly be- 

 yond the cereal apices. Interocular space of same width. Dorsal surface of 

 abdomen unspecialized. Supra-anal plate triangularly produced, with apex 

 rounded but deeply cleft; length about one-third basal width. Subgenital 

 plate ample, convex, short, briefly upturned distad, with a brief medio-longi- 

 tudinal cleft in this portion; free margin broadly convex proximad, then as 

 broadly concave beneath bases of cerci, thence with margin of briefly upturned 

 portion very broadly convex. 



Measurements (in millimeters) 



_y\ Length of Length of Width of Length of Width of 



*-' body pronotum pronotum tegmen tegmen 



Cacao, Guatemala, t\j\ie. 14.8 4 6.5 17 5.2 



9 



Santa Lucrecia, Mexico, 

 allotype 14.5 4.2 6.4 15.5 5.1 



' This portion can not be examined without risking damage to the unique 

 male. 



TRANS. AM. ENT. SOC, XLV. 



