178 REPORT OF STATE GEOLOGIST. 



females could l)ut erawi, and that rather sluggishly for a i')!altid, 

 toward a new hiding place. A mature male was taken in the same 

 place on May 12, 1894. In June, 1902, a number Avere found in 

 Crawford County beneath flat stones and rubbish on the tops of high 

 hills near Wyandotte Cave. A single female was also captured while 

 feeding upon a species of fleshy fungus {Agaricns) in dense woods in 

 Marshall County, Illinois, about eight miles west of Terre Haute. 

 Brunner {loc. cit.) recorded it from "Amerique du Nord," and I can 

 find no other note of its occurrence in the United States. 



IV. IsciiNOPTERA Burmeister (1838). 



J>ody of nuile ratlu-r narrow, oblong; that of female broader, or- 

 bicular. AntcnniT! nearly or fully double the length of the body. 

 Pronotum small, orbicular or" of the form of an ellipse; in the male 

 often much narrowed in front. Tegmina membranaceous, more or 

 less translucent, longer than the abdomen in the males, abbreviated 

 (in our species) in the females. AVings hyaline; "the discoidal (ulnar) 

 vein, instead of sending longitudiiial branches exclusively to the. 

 apical margin, sends also small oblique branches to the anal vein 

 (vena dividens)." Cerci long and relatively stout, 12-jointed. Supra- 

 anal plate of the male broad, the apex either truncate or rounded; 

 that of female narrower, triangular and obtuse. Sub-genital plate of 

 male bearing two rather long stylets which are often deflexed. Last 

 abdominal plate of female entire. 



Five species of our native roaches belong to this genus. They may 

 be separated as follows: 



KEY TO INDIANA SPECIES OF ISCHNOPTERA. 



rt. Size largo; length of body of male, 19 or more mm.; of body, includ- 

 ing tegmina, 25 or more mm. 



h. General color fuscous or chestnut brown; the center of disli of 

 pronotum dark, the sides yellow. 



e. I'ronotuni elliptical, nearly as wide in front as behind, the 

 sides flaring, but little deflexed; tin? center of disk 



rufous 5 peinisi/lranird. j). IT!) 



cc. Pronotum notably narrower in front than behind, tlie sides 



strongly deflexed; the center of disk black 



6 inwqualis, p. 182 

 bl). General color light reddish or yellowish brown; the sides of pro- 

 notum not mai'kedly different in color from the center of 

 djsli. , , : , 7 major, p. 183 



