48 NORTH AMERICAN BLATTIDAE 



area, deplanate for a short distance, then transversely convex, with lateral margins 

 converging ventrad. Maxillary palpi extremely elongate and slender. Pronotum 

 transversely very weakly raised; lateral portions narrow, rather opaque and mod- 

 erately deflexed, with immediate margins upcurved; caudad, above the insertion 

 of the tegmina, the pronotum, to its disk, is distinctly convex; caudal margin trans- 

 verse (varying from very weakly convex to very weakly concave). Channels be- 

 tween discoidal sectors of tegmina as pronounced as the veins. Dorsal surface of 

 abdomen unspecialized to fifth segment, there showing a slightly raised and rounded 

 convex ridge mesad at its caudal margin, this ridge forms the cephalic portion of 

 the periphery of a circular, deeply depressed area, mesad on the sixth segment, 

 which is bounded by a slightly raised and rounded ridge and has its floor heavily 

 clothed with agglutinated hairs directed meso-cephalad, thus forming a low, sub- 

 conical tuft, latero-caudal angles of segment not produced and broadly rounded; 

 seventh segment decidedly constricted, caudal margin transverse; eighth segment 

 and supra-anal plate even more strongly constricted, with caudal margin of eighth 

 segment broadly convex, thus embracing all but distal portion of supra-anal plate. 

 Supra-anal plate narrowly visible, feebly triangularly produced, with apex weakly 

 emarginate. Dorsad the anal chamber is filled proximad by two, irregularly 

 rounded, chitinous plates, flattened caudad, beneath which projects a soft integu- 

 ment, terminated by a small, somewhat twisted, chitinous plate, with ventral mar- 

 gin convex and acute-angulate dorso-distad. Subgenital plate strongly triangularly 

 produced, the lateral margins with a sudden, shallow offset on each side from 

 which spring rather large, elongate, simple styles, directed along the margin of the 

 plate toward its apex, which is convex and rather deeply and narrowly cleft. 



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

 following features. Form moderately stout. Head distinctly broader; interocular 

 space distinctly wider than eyes; ocellar areas decidedly smaller, rounding more 

 sharply into inter-ocular-ocellar area; ocellar spots smaller and feebly defined. 

 Pronotum in general similar but more ample, with contour more even and areas 

 above insertion of tegmina hardly raised. Tegmina much shorter, extending only 

 to end of abdomen and more chitinous in structure; discoidal sectors (usually 8 or 

 9 and more crowded, due to tegminal reduction) and intervening channels much 

 less strongly defined. Dorsal surface of abdomen unspecialized. Supra-anal plate 

 transverse, weakly triangularly produced, with apex briefly rectangulate emargi- 

 nate. Subgenital plate large and broad, distal margin truncate and very weakly 

 convex, showing a weak, obtuse-angulate, rounded emargination at point where 

 cerci project. 



Measurements {in millimeters) 



Key West, Florida 11.3 



Key West, Florida 1 1 . 5 



