244 THE CANADIAN ENTOMOLOGIST. 



Occidentalis is probably the least common species of the genus in the 

 State, its general range being more western. 



Paroxya atlantica, Scudder. 



Paroxya atlantica, Scudder, Proc. Bost. Soc. Nat. 



Hist., XIX., 29. 



My Pezotettix hoosieri (C. E., XXIV., 31) is doubtless a short-winged 

 form of this species. Typical specimens of atlantica recently received 

 from Mr. A. P. Morse differ only in being much duller in colour, and in 

 having the tegmina reaching to end of abdomen. I have taken hundreds 

 of the form hoosieri in this State, and in no one have the tegmina reached 

 beyond the middle of abdomen, but wing length in orthoptera is a 

 character of but little importance. In Mr. Scudder's original description 

 oi atlantica, the length of antennae of $ is given as 10 mm., whereas, in 

 the examples received from Mr. Morse, and in all taken in Indiana, they 

 are fully 15 mm. in length. 



I have found this species in but two localities in the State, viz. : about 

 the margins of a large pond in Vigo County, and in a tamarack swamp in 

 Fulton County. It is abundant in both places from August to October. 



Melanoplus collinus, Scudder. (C. E., XXIII., 99.) 



For the past three years this has been a very common locust, reaching 

 maturity in this vicinity about July 15th. Like the next species and 

 Pezotettix gracilis, it delights to carry on its courtship among the leaves 

 and branches of the iron weed, and hundreds may be taken there, many 

 of them in copulaiion, as early as August ist. While of about the same 

 length, the females are much more robust than those of either M.femur- 

 rubrum or M. atlanis, and the tegmina just reach the tip of or are a 

 little shorter than the abdomen, instead of exceeding it as in those species. 

 It doubtless occurs throughout Indiana, having been taken on the border 

 of Lake Michigan, by Prof. Slick. 



Melanoplus bivittatus, Say. (C E., XXIII., 99.) 



A common species in e irly summer, making its appearance about 

 June 15th, and disappearing by mid-September. 



Mr. Scudder considers M.femoratus, Burmeister, as distinct from this 

 species, stating* that : "-bivittatus has the hind tibi* glaucous and yellow ; 

 in femoratus they are red ; and the two species can be instantly dis- 

 tinguished by these peculiarities." 



*Report Brit. N. A., Bound Survey, 1875, 343. 



