58 NORTH AMERICAN BLATTIDAE 



moderately large chitinous lobe with surface moderately convex, a chitinous, acicii- 

 late process is directed ventro-mesad. Subgenital plate strongly asymmetrical, 

 subdeplanate, except laterad, where the lateral portions are rather narrowly re- 

 flexed; sinistral margin briefly lobate proximad, due to an acute-angulate emar- 

 gination immediately dextrad of sinistral cercus, the margin decidedly thickened, 

 straight and rather strongly oblique from base of this emargination to near mesal 

 point of the plate; there supplied with a very small, rounded, decurved style, the 

 dorsal surface of which is supplied with scant, chitinous, microscopic spines; close 

 to this style on the distal margin is situated the dextral style, which is very minute, 

 not half as large; remaining portion of free margin of plate gently convex. Limbs 

 and armament of same as giv^en in generic description. 



Characters of Female. — (Key West, Florida.) Agrees with male except in the 

 following features. Size appreciably larger, form less slender. Interocular space 

 slightly wider. Dorsal surface of abdomen unspecialized. Supra-anal plate trans- 

 verse, moderately triangularly produced, with apex blunt, lateral margins weakly 

 concave. Subgenital plate large, not produced, surface decidedly convex, distal 

 margin subsinuous, nearly transverse. 



Measurements {in millimeters) of extremes of series 



Co/oration. — General coloration ochraceous-buff to ochraceous- 

 tawny. Head, from interocular space to inter-ocellar space, 

 heavily washed with mars brown. Pronotum with paired, mod- 

 erately heavy, longitudinal lines of deep mars brown, leaving a 

 slightly broader longitudinal band mesad, which is sometimes 

 washed with tawny. Rarely these bands are more decided (inten- 

 sive), or very feebly indicated (recessive). 



Immature examples of the species have the pronotal bands nor- 

 mally broader and continued on the mesonotum and metanotum, 

 while the abdomen is heavily suffused with the darker coloration. 



Ootheca.—ln proportion to the size of the insect this is extremely 

 large, 7 by 3.2 and 8 by 3.3 mm. in specimens before us; carried with 

 suture laterad. Sutural and ventral margins weakly arcuate, 

 width everywhere equal; distal margins straight, vertical. Sur- 



" The body bulk shows more contrast between the sexes than this measurement would 

 indicate, due to the fact that, in the male, the subgenital plate is strongly produced, while 

 in the female it is decidedly truncate. 



