1 76 FAMILY V.— ACRIDIIN^. 



Measurements. — Male: Length of body, about 43 mm.; 

 wing-covers, 45 mm.; posterior femora, 24 mm. Female: 

 Length of body. 52 mm.; wing covers, 54 mm.; posterior 

 femora, 28 mm. 



Both sexes are illustrated in Figs. 105 and 106. 

 The group Me/anop// contains only three genera found in 

 Minnesota, viz. Hesperotettix Scudder, Melanoplus Stal, 

 and Phoetaliotes Scudder. 



A. Subgenital plate of male furnished with a distinct sub- 

 apical tubercle (i. e. one in which the apical margin 

 does not pass through and form a part of the summit 

 of the tubercle, but where it is distinctly separated 

 from the summit), but not otherwise tumescent. 



Hespero te t tix. 

 AA. Subgenital plate of male with no distinct sub-apical 

 tubercle, but often apically prolonged or tumescent. 

 B. Head not large in proportion to pronotum, nor 

 prominent, but little longer than the prozona; pro- 

 notum in no way sub-sellate, nor flaring in front; 

 tegmina, when fully developed, narrow; venation 



sharp and clearly defined Melanoplus. 



BB. Head large in proportion to pronotum, nearly half 

 as long again as the long prozona; pronotum 

 faintly sub-sellate, feebly flaring in front to re- 

 ceive the head ; tegmina, when fully developed, 

 broad ; venation loose and ill defined. 



Phoetaliotes. 



GENUS Hesperotettix Scudder (1875). 



Head not very prominent ; vertex very narrow between 

 the eyes, with a slight median pit ; the fastigium broaden- 

 ing considerably in front, declivant, shallowW sulcate in the 

 middle, the sides rounded ; front straight, a little (female) 

 or considerably (male) oblique; the frontal costa equal, 

 scarcely contracted at the extreme summit ; antennae slight- 

 h^ longer than the head and prothorax together; eyes 



