MORGAN HEBARD I 7 



broader than in azteca; costal veins (eight) weakly arcuate and strongly clubbed 

 distad; medio-discoidal area large with two transverse veinlets, the more distal 

 oblique and sending from slightly below the mesal point a longitudinal branch 

 distad; appendicular field in length about two-fifths that of remaining portion of 

 wing, length equal to width. (The features given below are characteristic of the 

 species of the genus.) Supra-anal plate transverse; free margin evenly convex, 

 with numerous hairs. Subgenital plate roundly produced with medio-distal 

 area defined proximad by a transverse sulcus and cleft medio-longitudinally.'" 

 Limbs slender. Ventro-cephalic margin of cephalic femora with (two) very slender 

 and elongate proximal spines, succeeded by a row of microscopic, very short, rather 

 closely set spinulae, terminated distad by two very slender spines, very elongate in 

 increasing ratio distad. Ventro-caudal margins of all femora with a few hairs. 

 Ventro-cephalic margins of median and caudal femora with a few elongate, slender 

 "spines. Tarsi very elongate ;'i claws of last joint very delicate, elongate; arolium 

 minute. 



General coloration ochraceous-buff, disk of pronotum slightly darkened. Head 

 with occiput ochraceous-buflf'- to a moderately broad, transverse band of prout's 

 brown between the ocellar areas; below ochraceous-buff, faintly clouded in places 

 with prout's brown; eyes blackish brown; ocelli light buff. Wings hyaline, weakly 

 iridescent, washed weakly with prout's brown, except in area of costal veins toward 

 their bases and in appendicular field where they are heavily washed with this color; 

 area of costal veins where they are clubbed, and narrow area at the extremities of 

 the rami of the axillary vein bordering the appendicular field, ochraceous-bufT.i^ 



Allotype. — cf ; Tabernilla, Canal Zone, Panama. May 13, 1907. 

 (A. Busck.) [United States National Museum.] 

 Agrees fully with type except in the following features. Abdomen more slender, 

 as would be expected in the male sex. Supra-anal plate remarkably specialized: 

 about twice as wide as long, free margin bracket-shaped, with slightly produced 

 mesal apex deflexed; dorsal surface of plate deeply impressed, forming a large meso- 

 proximal depression, about which the caudal margin of the preceding segment is 

 roundly emarginate; three-fifths the distance to the free margin of the supra-anal 

 plate is a low transverse ridge, heavily clothed on its cephalic face with long stiff 

 hairs directed cephalad, which tuft of hairs nearly fills the depressed area of this 

 plate. Subgenital plate simple, slightly the more produced dextrad; free margin 

 curving evenly at dextro-caudal angle, the small simple style there situated elongate 

 conical, about twice as long as basal width; margin interrupted at sinistro-caudal 



'" This is one of the types of female subgenital plate in the Blattidae which we term 

 valvular. See plate II, fig. 4. 



'1 The pulvilli arc either entirely absent or so minute as to be indistinguishable under 

 the highest magnification of a Zeiss binocular. 



12 In two males before us the ridge between the eyes is cream color, broadening mesad 

 into a large triangular patch, with apex ventrad. 



" In one paratype before us these markings are even more decided. This feature has 

 been accessible for study only in the few individuals of which the wings have been spread. 



MEM. AM. ENT. SOC, 4. 



