386 REPORT OF STATE GEOLOGIST. 



of August 3, 1900. Its general range is given by Scudder as "United 

 States from Rocky Mountains eastward." 



104. Orchelimum campestke Blatcliley. 



OrchcUmum «(»/»yx'.s//e BL, 10, XXV, 1893, 91; Id., 7,1893,133; Lugg., 

 84, 1898, 236; Scucld.. 188, 1900, 73; McNeill, 90, XXXH, 

 1900, 78, 81. 



A species of less than medium size, with wing covers narrow and 

 of almost equal width throughout; the posterior femora unarmed 

 beneath, and the ovipositor short, narrow, moderately upcurved, and 

 tapering to a delicate point. 



Cone of the vertex prominent, narrow, rounded at the apex; the 

 sides of the frontal, deflexed portion rapidly converging to form a 

 very acute wedge. Wing-covers long, slender, not narrowed in the 

 middle as in 0. vulgare, tapering slightly on the apical third to a 

 rounded end; their length a little shorter than the wings in both 

 sexes. Posterior femora with the basal half quite stout, the length 

 less than that of the tegmina. Cerci of male slender, cylindrical, 

 somewhat pointed, the apical half curved slightly outward, the basal 

 tooth short and weak. 



Color: Tegmina and wings almost uniform transparent olivaceous 

 brown. The usual dark reddish brown band upon the occiput and 

 disk of pronotum is margined on the latter with two very narrow 

 and darker brown stripes, which extend back to the middle of the 

 posterior lobe of the pronotum. Face, and usually the hind femora, 

 a dirty olive brown; the latter, when dry, with a blackish longitu- 

 dinal band on the exterior face. In the female the only green on 

 the body is on the lower part of the sides of the pronotum and on 

 the anterior femora. The males usually have the outer face of the 

 posterior femora green, but otherwise are colored like the females. 

 Ovipositor light reddish brown. 



Measurements: Length of body, male, 17.5 mm., female, 19 mm.; 

 of pronotum, male, 4.5 mm., female, 5 mm.; of tegmina, male, 20.5 

 mm., female, 24.5 mm.; of antennae, male, 46 mm.; of posterior 

 femora, male, 17 mm., female, 17.5 mm.; of ovipositor, 7 mm. 



This modestly colored grasshopper is very common in the northern 

 half of the State, where it abides in the tall grasses of the low prairie 

 meadows. It has not, as yet, been taken south of Marion and Vigo 

 counties. It is a smaller and more slender bodied insect than the 

 common 0. vulgare Harris, and has a shorter and narrower pronotum 

 and a much smaller ovipositor than that species. 



