58 THE CANADIAN ENTOMOLOGIST. 



DISSOSTEIRA CAROLINA. 



BY JEROME M'NEILL, MOLINE, ILL. 



During the past summer I collected at Dublin, Wayne Co., Ind., a 

 number of CEdipodi?u that seem to be a long-winged variety of the above 

 named species. A comparison of the dimensions given by Thomas and 

 Saussure for D. Carolina and D. lo7igipennis with measurements taken 

 from eleven of these specimens, will show what the difference amounts 

 to. The former, in his Acrididae of North America, page ii8, gives for 

 D. Carolina the following dimensions: "Female — Length, 1.5 to 1.75 

 inches ; elytra, length of the body ; posterior femora, about half the 

 length of the body. Male — Length, i to 1.25 inches ; elytra and wings 

 passing the abdomen about one-third their length." The same authority 

 gives for D. longipemiis : "Length, 1.14 inches; elytra, 1.27 inches; 

 posterior femora, 0.64 inch ; posterior tibiae, 0.55 inch." These dimen- 

 sions are those of the male, the female being unknown to Thomas. 



Saussure, in his " Prodromus Qidipodiorum," pages 137 and 138, 

 gives for the measurements of the first named species : " Length, female, 

 40, male, 33; elytra, female, 41, male, 36 mill." And for the last men- 

 tioned species : " Length, female, 45, male, 35 ; elytra, female, 46, male, 

 35 mill." 



It appears from these facts then that while the length of the body is 

 greater in D. lo?igipenjiis, the wings are proportionally longer in both 

 female and male of D. caroli?ia, and absolutely longer in the male of this 

 species, so that the latter is, in spite of the name, the long-winged species. 

 But the Dublin specimens exhibit a much greater contrast in the relative 

 lengths of the elytra and bodies, as a glance at the following table will 

 show : — 



No. I, female, length, 34; elytra, 41 ; posterior femora, 17; jiosterior tibire, 14 mill. 

 No. 2, ri M 37; ti 40; 11 M 17 ; n n 15 " 



Average ,. 1. 35.5; "40.5; " " '7; " " H-S " 



No. 3, male, length, 27 ; elytra, 33 ; posterior femora, 14 ; posterior tibiae, 12 mill. 



No. 4, II M 28; 11 34; II M 15; II II 12 It 



No. 5, n II 27 ; II 33 ; 11 II 14 ; m m 12 n 



No. 6, II 11 27 ; II 32 ; h n 15 ; u « 12 n 



No. 7i " II 30 ; II 34 ; n h 14 ; " " 12 « 



No. 8, II II 27 ; M 33 ; n n 14 ; n n 12 n 



No. 9, II ,1 28; M 35; M „ IS; M M 13 II 



No. 10, M II 26 ; II 33 ; II II 14 ; h m 12 n 



No. II, II II 29; II 34; II II 14; II II 12 II 



Average .1 h 275; .1 33^,; 1, .1 14^; n n 12J n 



