446 FAMILY VI. ACRIDIDJE. THE LOCUSTS. 



that species being sufficiently set forth in the key to Series and in 

 the following description : 



208. MELANOPLUS BIVITTATUS (Say), 1825, 308. Yellow-striped Locust. 



Females very large for the genus, the males much the smaller. Dull 

 olive-brown to brownish-fuscous above, pale yellow to dull greenish-yel- 

 low beneath. Face either yellow or olive-green, often flecked with fus- 

 cous; occiput and disk of pronotuni dark olive-brown. A narrow yellow- 

 ish stripe extends back from the upper inner angle of each eye along the 

 sides of disk of pronotuni nearly to tips of tegmina; this usually bordered 

 below with blackish on head and lateral lobes of pronotuni. Tegmina usu- 

 ally immaculate, often with a few fuscous dots along the median area. 

 Hind femora dull yellow, usually with a fuscous stripe along the upper 

 half of outer face; inner half of upper face with three more or less dis- 

 tinct fuscous bars; lower face yellow; knees in great part fuscous. Hind 

 tibiae usually bright coral red, with black spines, often purplish-brown or 

 greenish-yellow. Interocular space wide, equalling the frontal costa and 

 about three times the width of first antennal joint; fastigium feebly de- 

 clivent, broadly and shallowly concave. Frontal costa broad, subequal, 

 convex above the antennae, slightly sulcate at and below the ocellus. Pro- 

 notum widening feebly on posterior half, more distinctly so in female, 

 disk nearly flat, hind margin broadly obtuse-angulate or subrounded; me- 

 dian carina distinct on metazona, very low, sometimes in part subobsolete 

 on prozona, the latter fully one-half, male, or about one-third, female, 

 longer than the closely and very finely punctate metazona. Tegmina reach- 

 ing or slightly surpassing the hind femora, sometimes a little shorter in 



Fig. 150. Female. X I -3- (After Lugger.) 



female, tapering regularly and gradually from base to the rounded tips. 

 Hind femora distinctly surpassing abdomen, male, reaching its tip or 

 slightly beyond, female. Supra-anal plate broadly triangular, abruptly 

 narrowed and sharply incised each side near the blunt apex; its margins 

 upcurved to form a broad lengthwise concavity each side of the deep, 

 rather narrow median sulcus. Furctila consisting of a pair of very short, 

 much swollen, triangular widely separated lobes. Cerci as shown in 

 Plate IV, q. Subgenital plate short, rather narrow, the apex slightly 

 elevated and ending in an obtuse tubercle. Length of body, $ , 23 29, 9 , 

 3140; of antennae, $, 1416, $, 1114; of pronotum, $, 67, 5, 89; 

 of tegmina, $, 1722, $, 20 25; of hind femora, $, 1316, $, 17 22 

 mm. (Fig. 150.) 



In Indiana this is one of the most common of our early summer 

 locusts, occurring evei^where throughout the State. It begins 



