158 



notch at the end is narrower and much deeper. The general color is also 

 lighter, being a reddish instead of a mahogany brown, while the prono- 

 tutn is broadly margined on the sides, and narrowly in front, with yellow 

 which encloses a large bi-lobed brown spot.® 



Measurements: Male— Length of body 27 mm.; to tip' of wings, 45 

 mm. ; of tegmina, 27.5 mm. Female — Length of body, 30 mm. ; greatest 

 width of body, 14 mm. 



The American cockroach is, as its specific name indicates, a native of 

 this country ; but like P. orientals, it has spread to the four corners of the 

 earth. It is by far the largest species found in the State, but seems to be 

 of rather limited distribution as I know of its occurrence in but two 

 counties, Putnam and Marion. It occurs in numbers in some of the lead- 

 ing hotels of Indianapolis, but usually confines itself to the basement 

 and first floor, and appears to be much more cleanly in its choice of an 

 abiding place than does the closely allied Oriental roach. 

 II. Ischnoptbba, Burmeister (1838.) 

 Males, with the sub-anal stylets present but minute, and often bent 

 abruptly downward ; last abdominal sterniteof the female divided ; supra- 

 anal plate in both sexes rounded, not notched at the end nor extending 

 as far backwards as the sub-genital. Body narrower and more elongate 

 than in Periplaneta, the abdomen not wider than the thorax ; in the males, 

 tapering gradually to a rounded point. Legs spined as in Periplaneta but 

 the spines not so long and strong as there. Two species occur in Indiana. 

 3. Is, hnoi'tera pennsylvanica, (DeGeer.) The Pennsylvania Cockroach. 

 Platamodes pennsylvamca, Scudder, Bost. Jour. Nat. Hist., VII. , 1862, 417. 

 Riley, Stand. Nat. Hist., II., 18S4, 172. 

 Comstock, Intro. Ent., I., 1888, 93. 

 Blatta pennsylvanica, Thomas, Trans. 111. St. Agl. Soc, V., 1865, 440. 

 Ischnoptera pennsylvanica, Packard, Guide, Stud. Ins., 1883, 576. 



McNeill, Psyche, VI., 1891, 78. 

 Ectobia Uthophila, Scudder, Bo3t. Jour. Nat. Hist., VII., 1862, 418.— (ju- 



venile.) 



Blatta americana, Rathvon, U. S. Ag. Rep., 1862, 375. (Note and fig. 5 a.) 



Tegmina, long and narrow, extending, in both sexes, much beyond the 



tip of abdomen. Wings as long as tegmina. Disk of pronotum dark 



brown, margined on sides, and sometimes narrowly in front, with pale 



* In this respect it is quite similar to Ischnoptera peiinsijlniuicn DeGeer, from which it 

 may be readily distinguished by its much hroader body and tissured supra-anal plate. 



