234 FAMILY VI. ACRIDIDJE. THE LOCUSTS. 



aa. Lateral carinae distinct only on metazona, absent or very faint on 

 prozona; inner apical spurs of hind tibia? very unequal, the second 

 or inferior nearly twice the length of first; broadest part of male 

 tegmina situated at the middle. II. AGENEOTETTIX. 



I. CHORTHIPPUS Fieber, 1852, 1. (Gr., "grass" -(- "horse.") 



Slender bodied species, having the vertex triangular, its apex 

 obtuse, female, acute, male; foveolae present as distinct, narrow, 

 oblong impressions ; frontal costa wide, sulcate only around or 

 below the ocellus; antennse flattened toward base, subequal in 

 length to, female, or much longer than head and pronotum, male; 

 pronotum with median carina distinct, cut very slightly behind 

 middle by the principal sulcus; lateral carina? incurved so that 

 the middle of disk is narrower than either the fore or hind margin ; 

 lateral lobes of pronotum about as long as deep, their front mar- 

 gin oblique, straight, hind and lower margins sinuate; tegmina 

 variable in length, usually fully developed in male; wings a little 

 shorter than tegmina; hind femora rather slender, not trans- 

 versely barred; hind tibiae with 12 13 spines on outer margin; 

 subgenital plate of male conical, obtuse, ascending; valves of ovi- 

 positor short, plainly exserted. 



The generic name Cliortluppus Fieber (1852) is in part at least 

 synonymous with Stcnobotlirus Fischer (1853) and the American 

 species ascribed by Scudder in his Catalogue to fttenobothnis are 

 now to be referred to the present genus. Many of the early Amer- 

 ican writers accredited to RtenobotJints numerous species now 

 recognized as belonging to other genera, Thomas (1873) having so 

 placed no less than 16 species. As at present limited, Stenobotlirus 

 is not represented in America. 



101. CHORTHIPPUS CURTIPENNIS (Harris), 1835, 56. Marsh Meadow Locust. 



Small, slender, compressed. Color exceedingly variable, usually light 

 brown above, with a black bar each side extending back from eye along 

 the upper half of lateral lobe of pronotum; beneath yellowish, the sides of 

 abdomen spotted with black and hind knees of the same color; face and 

 lower sides of pronotum sometimes gray or even green; antennas brown- 

 ish-yellow at base, the apical halves brown or black. Vertex often with a 

 faint trace of a median carina. Lateral carina? of pronotum converging 

 on the prozona to first sulcus, then diverging to hind margin which is ob- 

 tusely angulate. Tegmina in most females about three-fourths the length 

 of abdomen, in males usually reaching tip of abdomen, though they may 

 be longer or shorter in either sex. Hind femora in short-winged male sur- 

 passing tegmina 2 3, in female, 3 5 mm., in long-winged form reaching 

 to or surpassing tips of tegmina 1 2 mm. The males are apt to be mis- 

 taken for those of Chlcraltis conspersa, but may be easily distinguished by 

 the presence of foveolse, narrower black bar on sides of pronotum and 



