128 NORTH AMERICAN BLATTIDAE 



declivent distad. Cerci elongate and slender, with lateral margins moderately 

 crenate distad. Subgenital plate weakly convex, except at immediate base of 

 sinistral style and more extensively at base of dextral style, where it is weakly con- 

 cave; free margin roughly convex except before base of sinistral style, where a brief 

 emargination (normally) occurs.^o* Styles small, simple and cylindrical, situated 

 disto-laterad in sockets on the ventral surface of the plate at the free margin, each 

 slightly shorter than half the distance between their bases. Exposed folded ventral 

 portion of seventh dorsal abdominal segment in length equal to exposed portion of 

 ninth ventral abdominal segment. 



Characters of Female. — (Raleigh, North Carolina.) Size very large, form very 

 robust. Head larger and more evenly rounded than in male, with interocular space 

 slightly less than that between antennal sockets, large ocellar spots present. Pro- 

 notum very much larger than in male, with greatest width at point near caudal 

 margin and discal sulci obsolete. Tegmina represented by broad, quadrato-ovate 

 pads; veins distinct; sutural margins overlapping; distal margin broadly rounded, 

 with its mesal portion (normally) transyerse.^os the truncation commencing dis- 

 tinctly beyond the apex of the anal field. ^oe Wings represented by decidedly atro- 

 phied pads, with apices acute, fields and veins subobsolete. Sixth dorsal abdominal 

 segment with distal margin briefly concave laterad, broadly and distinctly convex 

 mesad. Supra-anal plate nearly half as long as wide, lateral margins convergent 

 and feebly concave to rather bluntly rounded apex. Subgenital plate strongly 

 convex, with free margin showing a weak concavity proximo-laterad before bases 

 of cerci, thence feebly convex throughout, but with mesal portion showing a broad 

 flattening of this convexity. 



cf 



Measurements (in millimeters) 



Length of Length of Width of Length of Width of 



body pronotum pronotum tegmen^"' tegmen 



Delaware — 4-8 6.1 21.8 6.4 



Plum Point, Maryland 17.5 4.6 5.7 18.9 5.7 



Raleigh, North Caro- 

 lina (11)20-21.5 4-8-52 5-9-6.4 19-4-22.1 6-6.8 



Jacksonville, Florida. . 19.5 4.5 5-8 i9-7 5-9 



Crawford County, In- 

 diana 20.5 4.6 5.7 21.8 6.7 



214 This concavity is occasionally subobsolete; rarely it is broader and more extensive, 

 extending over half the sinistral margin. 



-»5 In some series this margin is evenly and broadly convex, \-ery rarel>- a faint 

 concavity Is indicated on the margin of the discoidal field. 



2'"5 Rare specimens havethis truncation commencing immediately at the ajiex of the anal 

 field. In such specimens the usually much greater size serves to separate them from 

 females oifulvescens, to which of the other species they alone bear a general resemblance. 

 It is important to note that fulvescens attains its greatest size development in southern 

 peninsular Florida, in which region lata apparently does not occur. 



2»' The length of the exposed portion of the tegmen is given for females. 



