78 THE BLATTIDAE OF PANAMA 



the cerci. Wings with a moderately well developed intercalated triangle. Dorsal 

 surface of abdomen specialized as is characteristic of the genus; eighth segment with 

 caudal margin rather strongly concave. 



Supra-anal plate symmetrical, slightly over half as long as basal width; trapezi- 

 form produced between the cerci, with latero-caudal angles rounded and distal por- 

 tion curled briefly ventrad, this decurved surface hairy, the transverse distal margin 

 very feebly obtuse-angulate emarginate with apex of emargination rounded, this 

 margin with ventral surface supplied with a narrow fringe of chaetiform spines 

 directed cephalad. Cerci with joints (ten to twelve in the series) as in mirella. 



Concealed genitalia: paired plate beneath supra-anal plate developed into two 

 large disks, forming the basal wall of the anal chamber, the dextral overlapping the 

 sinistral, the distal margins of these plates supplied with short heavy teeth (plate 

 IV, fig. 15): titillatpr with apex simple and aciculate. 



Subgenital plate with surface weakly convex, supplied with scattered hairs; sinis- 

 trad produced for a brief distance and curled under the cercus, the free margin of 

 this portion fringed with chaetiform spines; dextrad produced about twice the 

 length of the sinistral production and similarly curled under the cercus, the distal 

 extremity of the dextral free margin bearing within a conical process much heavier 

 than, and as long as, the largest style, its blunt apex supplied with a tuft of elongate 

 agglutinated chaetiform spines, this directed sinistrad and entirely within the anal 

 chamber; beyond these lateral portions the distal margin is transverse and weakly 

 concave on each side, the remaining median third briefly produced, trapezoidal, the 

 dextral production slightly the greater; sinistral style at sinistro-distal angle of this 

 production, small, rather slender, cylindrical, over four times as long as proximal 

 width, with apex bearing a few minute teeth; dextral style at dextro-distal angle of 

 this production, similar to sinistral style but about three-quarters as large, extending 

 a very slight distance further caudad, due to the general greater production of the 

 plate in the dextral portion. 



Armament of limbs as characteristic for the genus. Four proximal caudal tarsal 

 joints supplied ventro-distad with small pulvilli. Arolia small. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 



This sex differs from the male in the following features. Size distinctly larger.^"* 

 form more robust. Interocular space broader, but, due to the broader head, show- 

 ing the same proportionate width to that between the ocelli and that between the 

 antennal sockets. Ocelli not as large and angle with interocellar area not as sharp. 

 Tegmina and wings proportionately fully as elongate as in male. Supra-anal plate 

 triangularly produced with lateral margins feebly convex and apex showing indi- 

 cation of emargination. loa Subgenital plate moderately convex except toward 



i"8 The decided variation in size and coloration of the four females at hand would 

 cause uncertainty, as to whether more than one species is represented, were it not for the 

 fact that they agree closely in general structure, differing only in features which can not 

 be considered of specific diagnostic value, while the fourteen males before us are readily 

 recognizable as belonging to but one species. 



i"" In the series varying from a type in which the apex is rounded, to one in which it is 

 distinctly emarginate, forming two well-rounded i)rojections. 



