514 
duce the apparent increase of adults at this time. Mature examples of 
this species were seen as early as June 16 and as late as October 25. 
Melanoplus femur-rubrum (DeGeer). The most abundant grasshop- 
per, swarming everywhere, except in woodland locations and on very dry 
and barren ground. Its predilections are for relatively humid areas, and it 
is in consequence especially abundant in the bottom lands, and about ditches 
and other moist spots. It avoids dense herbaceous thickets and favors 
open grasslands and clover fields. It reached maturity by the last of July 
and was found continuously from then until frost. The last record I have 
is November 2. 
Melanoplus luridus (Dodge). Of regular occurrence, though not al- 
Ways common on grassy spots in dry woods or in their immediate vicinity. 
Usually associated with Spharagemon bolli. 
August 1, a male taken in blue grass close to the edge of the woods on 
the bluffs at the head of Happy Hollow (5), nymphs also found here: 
August 24, several of both sexes found in mixed blue grass and Panicum 
huachuce in open woods on a bluff at the head of the ravine (38) be- 
tween West Lafayette and the mouth and Indian Creek: September 1, a 
small number in a clearing in the woods on the bluff at the head of JIlappy 
Hollow (5): September 6, frequent in blue grass in a dry open gvove on 
the bluffs near Wild Cat Creek (10), associated here with Jfelanoplus 
scudderi. 
Melanoplus bivittatus (Say). <All specimens seen were of the red- 
legged or femoratus type. The species is oily moderately frequent and 
more or less local. It was found in fair numbers about the middle of 
July on the grounds of the Purdue Experiment Station. but it soon became 
quite scarce and after the early part of August only occasional individuals 
were noted and that only in the more or less rank vegetation that flour- 
ishes in neglected spots along the stream bottoms. 
July 22, moderately frequent in timothy in a waste lot and in the 
nearby corn and soybean patches on the Purdue Experimental farm (35) ; 
August 9, fairly common in thickets in or near low woods on Burnett Creek 
(2); August 20, occasional in marshes and surrounding thickets at outer 
margin of Wabash bottoms below West Lafayette (6): September 6, a 
female observed in tall herbaceous thickets at the base of a bluff near 
Wild Cat Creek (10). 
Melanoplus differentialis (Thomas). Abundant in sheltered situa- 
tions in all humid situations; less frequent, but not uncommon in upland 
