PSYCHE. 



367 



Specimens with red hind tibiae are 

 about as common as those with green 

 legs. My collection contains thirty-nine 

 of the former and forty-two of the latter. 

 Difficulty is frequently experienced in 

 distinguishing red leg females from 

 those of Mel. femur rtihrum. The 

 weakness of the median carina on the 

 prozone, the length of the tegmina and 

 their more distinct maculation are all 

 useful characters, but I have found the 

 sharpness of the prosternal spine a good 

 guide when other distinctions failed. 



Melanoplus femur-rubrtim De Gcer. — 

 This species is abundant in meadows 

 and pastures. Short winged females 

 are somewhat difficult to distinguish 

 from Mel. impudiciis but the last men- 

 tioned species may be known by the 

 fact that the second sulcus of the pro- 

 zone is twice as distant from the third 

 as from the first. A single specimen, 

 female, from Fayetteville captured Oc- 

 tober fifth has green hind tibiae. 



Mehxnoplus packardii Sciidd. — I have 

 collected this very variable species 

 at three points in the State. It was 

 found to be common on the shores of 

 the Arkansas River opposite Pine Bluff 

 on September first. I found it again 

 amongst the rank vegetation about the 

 mouth of the Big Buffalo in Marion 

 County July twentieth. Specimens from 

 these two localities differed strikingly in 

 size and color and to a slight extent in 

 structure. The former were smaller, 

 paler, less distinctly marked and had 

 green instead of purplish red hind tibiae. 

 Still other specimens were captured 



near Diamond Cave in Newton county 

 July twenty-seventh which had either 

 red or green hind tibiae and in other 

 respects were intermediate between the 

 first two series. 



Melanoplus impudicus Stiidd. — This 

 species hitherto known only by three 

 specimens from Georgia and Missis- 

 sippi is represented by a considerable 

 number of specimens in my collection. 

 These seem to agree well with the 

 published description and figure, except- 

 ing only that the tegmina never exceed 

 the femora in the females and in the 

 males there is no distinct post-apical 

 tubercle on the subgenital segment and 

 the apical half of the cerci is less than 

 one half the width of the base. It is 

 confined so far as I have observed to 

 the open borders of woods on high land. 

 From Madison, Boone, Carroll, Newton, 

 Marion, and Washington counties. 



Melanoplus gracilis Bruner. — This 

 appears to be an uncommon species, 

 though it is apt to be rather abundant 

 where it occurs at all. I have met 

 with it but twice ; once near Yellville, 

 Marion county where it was common 

 on very dry rocky ledges amongst very 

 sparse vegetation in company with 

 Hadrotettix and Trimerotropis ; again 

 on the bank of White River a mile 

 below Buffalo City, Marion county. 

 Here it was quite common on the very 

 rank vegetation which flourished in a 

 soil which was occasionally enriched by 

 the overflow of the river. Specimens 

 from both localities agree well with 

 specimens from Illinois and Indiana. 



