SUBFAMILY I. TRYXALINJ-:. 207 



Lincoln, Neb., Sept.; Logan Co., Kansas, August (Jinnicr). 

 This variety or subspecies of the southwestern M. nmculipcnnis 

 Brunei* has been hitherto recorded by most American authors as 

 Opoinald Mmttata or Mermiria Mvittata (Serv.). Its known range 

 extends from northwestern Illinois west and north to southern 

 Montana and northern Utah, and south to southern Missouri and 

 southwestern Kansas. In Illinois Hart (1907, 231) states that it 

 was taken with H. neomewicana at Havana and at Teheran 

 "among long bunch grass, Paniciou rirgatinu L., in an old blow- 

 out between sand dunes" ; also at Tamaroa and Chautauqua. Rehn 

 states that it frequents for the most part patches and stretches 

 of sparse short grass and has been taken as adult from July 8 

 to Sept. 14. 



The three forms, Mvittata, maciilipennis and macclungi, are 

 very closely related and were it not that McClung has shown the 

 chromosomes of the first two named to be different, I should place 

 them as did Scudder (1899a) as one widely distributed and vari- 

 able species under the name of bivittata Serv. 



Tribe II. AMBLYTROPIDI. 



Shorter and usually proportionally stouter species than those 

 of the preceding tribe, having the antennae distinctly flattened 

 (except in Amblytropidia) but not ensiform or triquetrous; head 

 not conical, never longer than prouotuni, not or very feebly as- 

 cending; vertex with a distinct median longitudinal carina, its 

 apex usually rounded and sides not or but slightly raised; foveolae 

 wanting or invisible from above ; face distinctly oblique but much 

 less so than in the Tryxaliui ; pronotum with lateral lobes less 

 distinctly vertical, lateral carime usually converging at middle 

 and diverging on metazona, parallel in two genera; median carina 

 usually cut once in or not far behind the middle; teginina with 

 tips rounded ; wings transparent. Six genera represent the tribe 

 in the Eastern States. 



KEY TO EASTERN GENERA. OF AMBLYTROPIDI. 



a. Hind tibiae armed on the outer margin with 18 to 21 rather small 

 spines; color of female usually largely green; sexes very unequal 

 in size. I. SYRBULA. 



aa. Spines on outer side of hind tibise 10 15 in number; color of female, 

 in great part at least, brown or grayish-brown; sexes more equal in 

 size. 



1). Disk of pronotum with lateral carinse converging near middle 

 (feebly so in Eritettix) and closer together there than at 

 either the front or hind margin. 



