378 REPORT OF STATE GEOLOGIST. 



occiput and disk of pronotum, which is a dark, chocolate-brown, the 

 two colors being separated by a rather wide yellowish line which in 

 living specimens is very distinct. 



Fig. 94. Xiphidium saltann Seudder. 



(a) Female. Two and one-half times natural size. 



(6) Tip of male abdomen, showing form of cerci. (Original.) 



The cone of the vertex is short and rather narrow. Tegmina, 

 especially those of the female, very short and obtusely rounded. 

 The shrilling organ of the male is narrower and farther removed 

 from the base of tlie wing cover than in the male of X. slrictum, its 

 nearest ally. The tip of male abdomen is but slightly enlarged, 

 cerci elongate, tapering, a little curved outward and armed with a 

 rather long sub-basal tooth. Ovipositor equaling the body in length, 

 very slender and tapering, with its apical half slightly upcurved. 



Measurements: Male — Length of body, 10 mm.; of tegmina, 3 

 mm.; of hind femora, 9 mm.; of pronotum, 3 mm. Female — Length 

 of body, 11 mm.; of tegmina, 2.5 mm.; of hind femora, 9.5 mm.; of 

 ovipositor, 11 mm. 



Saltans as yet has been noted only at one point in the State, name- 

 ly, the border of a raw prairie near Heckland, A'^igo Comity, where- 

 it was found in small numbers on October 31, 1893, and in Septem- 

 ber, 1894. It appears to be less active than any other Xiphidium, 

 leaping a shorter distance when disturbed, and frequenting the sur- 

 face of the ground rather than the stems of the tall prairie grasses 

 among which it makes its home. It will probably be found, by 

 close search, to inhabit most of the few remaining patches of raw 

 prairie in the western part of the State. However, it has not been 

 noted elsewhere than in Vigo County, east of the Mississippi River, 

 although it is said by Bruner to be very plentiful in Nebraska, Iowa 

 and Kansas. 



100. Xiphidium strictum Seudder. 



Xiphidium strtrtum, Scudd., 15 1, XVII, 1875, 460; Id., 153, IV, 1875, 

 63; Id., 164, 1879, 13; Id., 183, XXX, 1898, 183; Id., 188, 

 1900, 75; Redteub., 1 10, 1891, 205; Bl., 7, 1893, 127; Lagg., 

 84, 1898, 242. 



