122 FAMILY VI. ACRIDIMO. THE LOCUSTS. 



like that of their backs." About Dimedin both nymphs and adults 

 occur throughout the winter along roadsides, in yards and gar- 

 dens and old fallow or abandoned fields. South of Lakeland it 

 has been hitherto recorded only from Marco. 



It is very doubtful whether the racial name propinquiis is 

 worthy of retention. The females, except for the slight difference 

 in color, are absolutely inseparable from those of the typical form, 

 and the males readily so only by the longer and less divergent fur- 

 cula. R. & H. (1916, 239) record the taking of intermediate forms 

 between it and fcniur-ru'bruiii in North Carolina, and give the 

 range of propinquiis, outside of Florida, as extending over the 

 Southern Coastal Plain from extreme southern North Carolina 

 through South Carolina and Georgia as far west as Flomaton, Ala- 

 bama. It has, however, been recorded by Morse (19(17, 51) from 

 Gulfport, Miss. 



Ang. 



.Sc 



Fig. 144. Extremities of female abdomens of Mclanoplus, showing the valves of ovi- 

 jositor. a, of atlanis', h, borcalis; c, luridus: d, coiifnsiis. Sc. = scoop of upper valves; 

 . = angulation at base of scoop. (After Morse.) 



197. MELANOPLUS BOBEALIS (Fieber), 1853, 120. Northern Locust. 



Size small, the sexes subequal. Above dark reddish-brown or green- 

 ish-yellow tinged with fuscous, beneath dull clay-yellow. The usual dark 

 stripe on upper third of prozona distinct in both sexes, somewhat broken 

 in female. Tegrnina almost or wholly devoid of fuscous markings. Hind 

 femora in northern individuals Cborealis) broadly bifasciate with fuscous 

 on upper and inner faces, lower face, except near base, deep red; knees 

 black; hind tibiae deep red, the spines wholly black; in southern speci- 

 mens (extremus) the femora are dull yellow, tinged with reddish-brown, 

 usually without traces of dark cross-bars, the lower face generally pale 

 orange; knees feebly infuscated; hind tibia? pale red or dull yellow. In- 

 terocular space one-half wider than basal joint of antennae, male, as wide 

 as frontal costa, female; fastigium rather strongly declivent, distinctly sul- 

 cate, male, broadly and shallowly so, female. Frontal costa very shallowly 

 sulcate around and below the ocellus. Pronotum short, feebly widening 

 backward in both sexes; prozona quadrate, slightly longer than metazona. 

 male, transverse and equal to it in length, female; hind margin broadly 

 obtuse-angulate, the angle more rounded in female; median carina distinct 

 on metazona, often subobsolete on basal portion of prozona. Extremity of 

 male abdomen but slightly swollen, feebly upcurved. Supra-anal plate 

 elongate-triangular, its apex acute-angulate, sides not thickened, distinctly 

 upcurved; median sulcus percurrent, expanding at apical third, its bound- 



