OKTHOPTERA OF INDIANA. 339 



touching except at the apices, where they slightly diverge. Cerci 

 strongly incurved, narrowed at the middle, the basal half stouter 

 than in P. Iwosieri, the apical third flattened and rounded at the end. 



Color: Metazona, tegmina, and upper and outer faces of all the 

 femora of male a uniform light wood brown; occiput and prozona 

 darker. A broad black stripe extends from the eye along the upper 

 half of the lateral lobes of pronotum as far as the posterior trans- 

 verse sulcus, where it ends abruptly, the posterior lateral lobe being 

 uniform in color with the disk. Below this black stripe is one of 

 ivory white, brightest on the head. Metapleura also ivory white. 

 Face grayish olive, flecked or tinged with yellowish. Basal two- 

 thirds of antennae the color of the tegmina; apical third darker. 

 Palpi and prosternal spine yellow. Sternites of thorax olive brown; 

 those of abdomen yellow as also the lower faces of all the femora. 

 Hind tibise dull, pale green (basal third sometimes light brown), with 

 a black spot at knee; the spines eleven in number in the outer series, 

 with their apical thirds black. 



Female darker; the tegmina sometimes obscurely and sparingly 

 flecked with fuscous; the yellow of under side dull or wanting. 



Measurements: Length of body, male, 17 mm., female, 24 mm.; 

 of antennse, male and female, 9 mm.; of pronotum, male, 5 mm., 

 female, 5.5 mm.; of tegmina, male, 13 mm., female, 14.5 mm.; hind 

 femora, male, 11.5 mm., female, 13.5 mm. 



This graceful-bodied species was first found in small numbers on 

 July 27, 1897, about the grassy margins of a pond in the sand dune 

 region north of Millers, Lake County, and within one-half a mile of 

 the shore of Lake Michigan. On the following day a single pair were 

 taken from a similar locality near Tolleston, in the same county, and 

 about four miles from the lake, but still within the sand covered 

 area. It was usually found clinging to the stems of the tall rushes 

 and grasses common in such locations, and when disturbed the males 

 used the wings in a noiseless flight, while the females depended upon 

 their leaping powers to escape. When closely followed, they would 

 attempt to hide by burrowing in the fallen grass. 



No others were secured until July 24, 1902, when a single male 

 was taken from low ground along a railway southeast of Hammond. 

 On August 20th it was found in numbers in the tall grasses along a 

 lobe of Bass Lake, Starke County. 



P. scudderi is more closely allied to P. atlantica than to either of 

 the other two known species of the genus, but its smaller size, shorter 

 antenna3 of male, longer cerci, and the different shape of the male 

 furcula at once distinguish it. It will probably be found to occur 



