74 



PSYCHE. 



[May 1S91 



point it is not much lower than the hills 

 on either side of the river valley. Its 

 size and isolated position make it a 

 conspicuous object from the river bluffs 

 for several miles above and below the 

 bridge. It is in fact a small island or 

 "tow head" in the old Mississippi chan- 

 nel. This river as is well known 

 once flowed through the Meridosia 

 swamps, which are situated about four 

 miles above Cordova , into the Rock 

 River valley, which it occupied to the 

 present mouth of this river. A consid- 

 erable part of this hill is fenced out from 

 stock and here the natural features have 

 been preserved for a long time so that 

 many species retain a foothold or even 

 flourish here which do not seem to occur 

 elsewhere in the county. Atlanis seems 

 to be at least imperfectly two brooded 

 in the northern part of the state f.s I 

 have taken a few specimens as early as 

 the middle of June while the great ma- 

 jority attain the adult stage after the 

 middle of August. It was formerly 

 thought to be not easy to separate this 

 species from M. femur-rubrum^ the 

 common Red-legged Locust of our mead- 

 ows, and indeed this difficulty still exists 

 in the case of the females, but it is now 

 known that the males at least can be 

 very readily distinguished from those of 

 the allied species. This distinction 

 consists mainly in the scoop-shaped 

 ultimate abdominal segment, which is 

 obscurely notched at the tip in attains 

 and in the rounded ultimate segment of 

 femur- rub rum which is squarely trun- 

 cate at the apex. 



So. Melanoplus femur rubrum De 



Geer. This well known species is 

 abundant everywhere in meadows and 

 along wood sides. It has been taken at 

 Moline as early as the twenty-third of 

 June. 



Si. M^elanoplus collinus Scudder. 

 This rather common species is pretty 

 closely restricted to the tops of hills and 

 the sides of ravines which are almost 

 too barren for pasturage. It is never, 

 so far as I am aware found in rich bot- 

 tom lands. 



52. Melanoplus punct?dat?is Uhler. 

 The museum of the State laboratory ot 

 natural history of Illinois contains two 

 specimens a male and a female from 

 Galesburg and Urbana. These are the 

 only specimens from the state that I 

 have seen. 



53. Mela?ioplus tfihzor Scudd. This 

 species is included in the list because 

 its occurrence in Indiana renders its oc- 

 currence here almost certain. It has 

 been captured at Bloomington, Indiana. 



54. Melanoplus different I alls Thos. 

 This species is common along road- 

 sides. Its earliest appearance at Moline 

 is August 8th. 



55. Jfelanoplus bivittatus Say. This 

 is an uncommon species in the northern 

 part of the state at least. In eastern In- 

 diana it is not unfrequently so numerous 

 as to do considerable injury to hay and 

 grain crops. It matures at least a month 

 earlier than the last mentioned species, 

 according to my observation, as I have 

 taken it at Dublin, Ind. as early as June 

 zSth and at Moline as early as the 7th 

 of July. 



56. Melanoplus cenchri n. sp. 



