I08 NORTH AMERICAN BLATTIDAE 



cephalad (normally) feebh' more convex than in virginica. Tegmina rounded, sub- 

 triangular, lateral pads, with sutural margins (normally) separated by slightly over 

 I mm.,"^ extending slightly beyond caudal margin of median segment,^" sutural 

 margins rather strongly convex to rather broadly rounded distal angle, which is 

 situated at the moderately convex costal margin; veins distinct but not prominent. 

 Wings represented b>' very small atrophied pads, their apices extending (normally) 

 slightly beyond caudal margin of metanotum.i^* Sixth dorsal abdominal segment 

 with distal margin distinctly, but broadly, convex in large mesal portion. Supra- 

 anal plate distinctly more than twice as broad as long, lateral margins weakly con- 

 cave and convergent from bases of cerci to rather broadly rounded apex. Cerci 

 shorter than in male, with lateral margins nearly entire, ^'^ with joints distinct and 

 dorsal surface very feebly convex. 



Measurements {in millimeters) 



_^ Length of Length of Width of Length of Width of 



*--' body pronotum pronotum"!) tegmen"' tegmen 



Wollaston, Massachu- 

 setts (2) 13.7-13.5 2.9-2.9 4- 1-4-3 16. 3-16. 4 5-6-5-4 



Whitemarsh, Pennsyl- 

 vania (27) 16-16. 5 3 1-3 -3 4- 3-4-9 16.1-17.7 5 3-5 -8 



Washington, District 



of Columbia (9) 13. 7-15. 5 3-1-3-2 4-3-4-7 iS-J-i? 5-6 



Raleigh, North Caro- 

 lina (7) 15-17 3-3-3-4 4-8-4-9 16. 7-17. 9 5.8-6.1 



Asheville, North Caro- 

 lina (68) 15-17 3-1-3-4 4-4-5 173-18.7 5-7-6-3 



Clayton, Georgia. .. . (2) 15. 5-1 5. 7 3.4-3.6 4.8-4.8 18. 7-1 8. 8 5-8-5-9 



IMossville, Illinois. .. . 15 3.4 4.7 17. 2 5.7 



St. Louis, M issouri ... (4) 1 3 . 3- 1 6 . 5 3-3 .6 4 . 3-4 .7 1 6- 1 7 . 7 5 . 3-5 . 9 



Iowa City, Iowa (2) 15 -5"! 5 3-2-3-3 4-3-4-7 16. 4-1 7. 4 54-5-9 



^^'^ Rare specimens show slightly less separation, while this dimension varies individu- 

 ally to nearly 2 mm. in certain specimens. 



1^^ The large series of females before us, shows decided variation in the tegminal 

 length. Frequent specimens have the tegmina extending only to the caudal margin of 

 the metanotiun, while in rare e.xamples these organs extend nearly to the caudal margin 

 of the first abdominal segment. 



1"* In individuals showing variation in tegminal size, a proportionate variation in the 

 wing pads is found. 



1"' Normally showing an extremely feeble crenation meso-distad. 



'"' The pronotal width is given as accurately as possible under the conditions here 

 found. The pronotum is usually somewhat distorted in trapped material, abnormally 

 buckled up, while in papered material it is sometimes more flattened out than in life. 



^^' The length of the exposed portion of the tcgmcn is given for females. 



