316 FAMILY VI. ACRIDIWE. THE LOCUSTS. 



to northern Mexico. Wherever found it occurs for the most part 

 in moist places, preferring the rank mixed growth of grassy 

 swamps and prairies to the drier fields and woodlands. The 

 Acridiuui cinarginatuin Scudd. 49 (1872, 250) is a synonym. 



135a. SCHISTOCEKCA ALUTACEA RUBiGiNOSA (Scudder), 1862, 4G7. Rusty 



Locust. 



Size medium, the body of female especially bulky. Color a nearly 

 uniform rusty brown, without median yellow stripe above; tegmina usu- 

 ally with numerous rounded fuscous spots on sides. Wings transparent 

 and glassy, slightly reddish toward tip. Head and pronotum wider than 

 in alutacea, the fastigium broader and more declivent. Frontal costa 

 wider and flatter than in alutacea, sulcate below the ocellus. Disk of 

 pronotum broader, with the sides less sloping on both prozona and meta- 

 zona, the median carina usually more prominent than in alutacea, other- 

 wise the same Tegmina exceeding the abdomen in both sexes. Length of 

 body, $, 30 3G, 9, 43 54; of antennae, $, 13, 9, 15; of pronotum, $, 

 78.5, 9, 011; of tegmina, $, 2532, 9, 3541; of hind femora, $, 

 1719, 9 , 2325 mm. 



This seems to be a scarce locust in Indiana, having been taken 

 only in Marshall, Cass, Porter and Crawford counties; July 20 

 Oct. 12. It prefers dry upland pastures and woodland, especially 

 those with a soil of sand, where scrub oak abounds. Its habits of 

 flight are the same as those of alutacea. Numerous specimens are 

 at hand from New England, in addition to those from Indiana, 

 and in all the fuscous spots of tegmina are plainly visible in both 

 sexes, whereas they are wholly absent in all males of alutacea, 

 and present but very faint on but two or three of the numerous 

 females of that species. 



In Florida i ultif/inosa has been recorded from a number of 

 places between Jacksonville and Key West, being the common 

 form on the southern keys. R. & H. (1910, 107) regard it as only 

 a color phase of alutacea, stating that intermediate forms occur 

 in New Jersey, South Carolina and Georgia. Morse (1004, 30) 

 says of the two : ''There is considerable variation in this species 

 in color and markings in the direction of alutacea. Possibly hy- 

 brids occur, but typically these two species differ in color, struc- 

 ture and haunts/' Later (1007, 44) he says: "It is very probable 

 that some so-called species of tfcJiistoccrca are but forms of one 

 which varies greatly in color and structure. In New England the 

 two forms known as alutacca and ruJtiginosa seem to be constant- 

 ly different structurally. Southward and westward the structural 

 gap between the two seems to be bridged and both vary much in 

 size, color, form and proportion of parts." I prefer to retain 



49 Kirby (1910, 458) accredits this name to Dodge (1871, 15). Dodge's paper was is- 

 sued in 1872 and he gave the name only as Acridium emarginatum Uhler. 



