\ OKTHOPTEKA OF INDIANA. 185 



tegmina sometimes chestnut brown. Top of abdomen fuscous brown 

 to piceous. Legs pale reddish brown. 



Measurements: Leng-th of body, male, 12 mm., female, 11 mm.; 

 of pronotum, male, 3 mm., female, 3.3 mm.; of tegmina, male, IG 

 mm., female, 3.7 mm.; width of pronotum, male, 4 mm., female, 

 3.7 mm. 



This light colored roach probably occurs throughout the State, 

 having been taken in numbers in Crawford, Vigo, Putnam, Marion, 

 Kosciusko and Lake counties. The males are often seen about elec- 

 tric lights in the cities; but when first reaching maturity about May 

 10, they are gregarious beneath the bark of logs and under chunks 

 and rubbish in open woods. The females appear fewer in numbers, 

 but are probably overlooked, their tegmina being so short that they 

 resemble the nymphs of their own or other species. 



The first record of the female in the State was made June 2, 1894, 

 as follows: "In a flat woods, seven miles east of Terre Haute, I 

 found a new species of cockroach quite common beneath the bark of 

 oak stumps. The wings short, covering less than one-half abdomen. 

 It may be the female of I. unicolor Scudd., as several of the long- 

 winged forms of the latter were beneath the same shelter." Since 

 then, I have usually found this short winged form in company with 

 the males of /. unicolor; and have taken them with ootheca pro- 

 truding in the first week of July. Some of the first ones taken were 

 sent to Scudder, who pronounced them T. virginicu Brunner, and 

 they agree in all respects with the original description of that spe- 

 cies, which v»^as made from a single female, and of which the male is 

 unknown. Since no female of I. unicolor has been described except 

 by Sauss.-Zehnt. under the name of I. uhUriana, I believe the T. 

 virginica to be the female of /. unicolor. Scudder, in Psyche (IX, 

 100), states that he has compared the types of uMeriana and unicolor 

 and that they are identic'al. He had previously seen Indiana speci- 

 mens of unicolor and pronounced them that species. Prof. L. Bruner 

 has recently sent me specimens of both sexes of uMeriana from Ne- 

 braska under the name of /. horealis Brunn. It is very probable that 

 that species is also a synonym of ulileriana, though only a comparison 

 of the different types will decide. Brunner states that I. unicolor may 

 be distinguished from /. horealis by the much lighter color and the 

 disposition of the nerves of the wings; but the color varies much with 

 age; while Saussure has shown that in certain species of Ischnoptera, 

 the venulation of the wings is also very variable.* 



'•'Miss. Scientif. Mex., p. 64. 

 42-Geol. 



