252 NORTH AMERICAN BLATTIDAE 



ened; branches of axillary vein without transverse connecting veinlets; appendic- 

 ular field ample. Dorsal surface of abdomen with sixth segment showing meso- 

 proximad a very weakly defined, circular area, supplied with minute, microscopic, 

 agglutinated hairs, which lie flat and are directed caudad.^^o Supra-anal plate 

 triangularly produced, length nearly equal to one-half of width; lateral margins con- 

 vergent and feebly concave to the blunt apex. Cerci simple, flattened; joints 

 weakly defined, ^^ distal joints tapering sharply to the acuminate apex. Subgenital 

 plate small; free lateral margins concave-convergent to the median area, which is 

 subquadrate emarginate; the basal margin of this emargination (the meso-distal 

 portion of the free margin of the plate) triangularly produced to an acute apex, 

 with sides feebly convex, this production longer than broad; at the lateral bases of 

 this production are found the slender, flattened, cylindrical (but broadened proxi- 

 mad) styles, which are laterally joined to the lateral portions of the plate, excepting 

 distad, at their rounded apices, which are directed caudo-laterad and are supplied 

 with a few, minute, chitinous spines, these apices project slightly beyond the acute- 

 angulate, sharply rounded apices of the lateral portions of the plate and well beyond 

 the acute apex of the mesal production. The styles are of similar form and equal 

 length. Armament of limbs and character of puhilli, arolia and tarsal claws as 

 given in generic description. 



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



Description of Allotype. — Very similar to male, dift'ering in the following char- 

 acters. Interocular space slightly broader, nearly equal to that between the antennal 

 sockets. Dorsal surface of abdomen unspecialized. Supra-anal plate generally 

 similar, but with apex distinctly emarginate, the projections thus formed broadly 

 rounded; the plate with a medio-longitudinal sulcation feebly suggested. Sub- 

 genital plate large and broad, very feebly convex, the very large mesal section subde- 

 planate; lateral margins briefly and weakly convex, parallel, then rounding into the 

 very broad, transverse distal portion, which laterad, at bases of cerci, is broadly and 

 shallowly, but distinctly, concave, the intervening portion of the distal margin 

 broad, nearly straight, very feebly convex; along this margin the plate curves 

 slightly upward. 



Measurements {in millimeters) 



Key West, Florida, type . . . 



Key West, Florida, para- 

 types (i6) 



9 



Key West, Florida, «//o/v/?e 5-5 i-3 2.3 5 i-9 



Key West, Florida, para- 

 types (11) 4-9-5-6 I. 3-1 -6 2.1-2.4 4-6-5I 1-9-2 



'9" This specialization can be seen only under a powerful lens. 

 S91 Usually about six in number. 



