214 FA MII.Y VI. ACRIDI1UO. THE LOCUSTS. 



of a few square rods, each colony probably remaining close to its 

 hatching point, the short wings precluding a wider dispersion. 

 When disturbed, the males leap actively two or three times, then 

 settle down, but the females are more clumsy and after one jump 

 often attempt to escape observation by burrowing among the 

 fallen leaves or grass stems. Scudder's types were from Ft. Reed, 

 Fla., and the species has been recorded from many localities in 

 that State, throughout which it doubtless occurs and to which, as 

 far as the records show, it is restricted. Live Oak being the most 

 northern point at which it has been found. 



The Eritcttif sijluestnts of the writer (1902, 192, 219) was 

 based, as has been pointed out by R. & H. (1912, 251), on two fe- 

 males of the form of P. obscura having the supplementary carina? 

 of pronotum distinct and the median dorsal buff stripe fully de- 

 veloped. The name si/lvcstnis may therefore be retained for that 

 color phase or variety of the species. The typical form is like that 

 of Erltettix simple.? in that all specimens known having a wholly 

 unicolorous dorsum of the pronotum, have also the supplementary 

 carinu 1 of pronotum wholly wanting. 



IV. CHLCEALTIS Harris, 1841, 148. (Or., "grasshopper.") 

 Medium sized, rather robust species, having the head short, 

 obtuse, feebly ascending; vertex triangular, its sides but little 

 elevated, disk more concave in male than female, median carina 

 short but distinct, foveohp wanting; frontal costa prominent, 

 more or less rounded above the antennae, flat or feebly sulcate be- 

 low the ocellus; pronotum Avith three carina 1 equally distinct, lat- 

 eral carina 1 more or less incurved, especially in female, so that the 

 middle of disk is plainly narrowed; lateral lobes of pronotum 

 slightly longer than high, fore and hind margins straight, oblique, 

 lower margin with posterior half nearly horizontal, its front portion 

 strongly ascending; tegmina of female abbreviated (rarely fully 

 developed), those of male well developed, with costal area dilated 

 and strongly reticulate; hind femora of medium size, banded on 

 the upper outer face; hind tibia 1 with about 12 spines on each 

 outer margin ; subgenital plate of male conical, blunt, strongly 

 ascending, equal to or shorter than the preceding segment; ovi- 

 positor short, little exserted, the upper valves enlarged and strong- 

 ly toothed above at base. 



KEY TO EASTERN SPECIES OF CHLCEALTIS. 



a. Hind margin of disk of pronotum truncate; male with lateral lobes 

 of pronotum black, and antennae nearly twice as long as head and 



