No. 16.] 



ORTHOPTERA OF CONNECTICUT. 



IO7 



dorsal part of the closed tegmina. Vertex at its nar- 

 rowest point between the eyes less than one and one- 

 half times the width of the second antennal joint. 

 Sub-genital plate of male with a more or less distinct 



sub-apical tubercle Hesperotettix p. no 



3. Dorsal surface of pronotum never twice as long as the 

 average breadth, generally only one and one-half 

 times the breadth, the sides more or less constricted at 

 the middle. Antennae of male less than twice the 

 length of the pronotum. Sub-genital plate of male 



rounded apically Melanoplus p. in 



Dorsal surface of pronotum twice as long as the average 

 breadth, sides not constricted at middle. Antennae of 

 male at least twice the length of pronotum. Sub- 

 genital plate with the apex truncate Paroxya p. 122 



Schistocerca Stal. 



Size large. Vertex with the front sloping down. Lateral 

 carinae low, faint; median carina absent. Lateral foveolae minute 

 or absent. Face nearly vertical. Pronotum with the disk rounded 

 on the prozona, nearly flat on the metazona, truncate in front, 

 hind margin broadly rounded or in some males obtusely angled. 

 Median carina present, but low. Mesosternal lobes longer than 

 broad. Tegmina extending much beyond the abclomen. Hind 

 wings large, nearly transparent. Hind femora slender, usually 

 reaching to or surpassing end of abdomen. Last abdominal seg- 

 ment of male not swollen. 



a 



FIG. 35. a. Schistocerca rubiginosa, male. b. Schistocerca alufacea, male. 



Head and pronotum 



