298 REPORT OF STATE GEOLOGIST. 



plate, conical, tapering to a rather sharp point. Tubercle on sub- 

 genital plate indistinct. (See Fig. 1, Plate I.) 



Color, bright pale green. A short fuscous bar below each eye and 

 on middle of sides of pronotum; also one along middle of occiput. 



Antenna; pinkish. Disk of prono- 

 tum with a pinkish or purplish 

 stripe along its middle, extending 

 back along median line of closed 

 ^,. ^, „ tegmina, and fading insensibly into 



i'ig.64. HenperoMtix pratentia Scudd. i> i ■ ■ -i tt- 



Female. Natural size. (After Lugger). the green of their SldcS. Hmd 



femora green, more or less tinged 

 with purplish. Hind tibiffi, pale bluish green; the spines whitish, 

 tipped with black. Abdomen greenish yellow. 



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

 antennje, male, 8 mm., female, 9 mm.; of pronotum, male, 5 ram., fe- 

 male, 6 mm.; of tegmina, male, 12 mm., female, 17 mm.; of hind 

 femora, male, 11 mm., female, 13.5 mm. 



This dainty and prettily colored species has been noted only in 

 Lake County, where it has been taken in two localities. On Septem- 

 ber 19, 1898, a single pair were secured from the long grasses border- 

 ing the margin of a swale north of Millers. Though careful search 

 was made there and elsewhere in the northern counties, no others 

 were secured until July 24, 1902, when I found them rather common 

 in a long, low, marshy tract, a mile southeast of Hammond. Here the 

 males were especially active, leaping from one grass stem to another 

 several times in succession, and dodging around the stem the instant 

 they clasped it with their legs. The females were oftentimes easily 

 picked up by the fingers from their resting places. No attempt was 

 made by either sex to use the wings in escaping. 



Pratensis ranges, according to Scudder, from the "Mississippi River 

 westward to California;" though he also names southern Illinois as 

 one of its localities. It should be looked for along the edges of 

 prairies and marshes throughout the western half of Indiana. 



XXXVIII. Melanoplus Stal (1873). 



Body moderately stout; generally feebly compressed. Head not 

 prominent,* but little if any longer than the prozona. Face almost 

 vertical. Vertex between the eyes but little wider than, the frontal 

 costa; the front half sloping downward, and always more or less sul- 

 cate, especially in the male. Frontal costa of average width and 



" Except in punctulaUi$. 



