SUBFAMILY I. — ARADIN^E. 297 



morphic, reaching apical lobes of abdomen, macropterous form, only to 

 middle of third dorsal, brachypterous one. Genital structure of female 

 as in fig. 16, a. Length, 5.8 — 6 mm. (PI. I, fig. 16). 



Known only from Southern Pines, N. Car. and Marietta, Ga. 

 Group IV. — Aradus. 



This group comprises rather elongate species having the 

 antennae slender, second joint distinctly longer than third; 

 front side margins of pronotum more or less serrate ; corium 

 always strongly dilated at base, never straight laterally. Eleven 

 of our eastern species and one variety belong here. 



KEY TO EASTERN SPECIES OF GROUP IV, ARADUS. 



a. Third antennal almost three-fourths as long as second; color uni- 

 form dull black; length, 8.3 mm. 223. montanus. 

 cut. Third antennal about one-half as long as second, often less. 



b. Second antennal cylindrical, longer than head; length, 8.5 — 11.5 

 mm. 224. debilis. 



bb. Second antennal shorter than head. 



c. Second antennal cylindrical, at least from near base to middle; 

 sometimes slightly enlarged near apex. 

 d. Third antennal with apical two-thirds pale; disk of pronotum 

 strongly elevated before and behind the transverse depression ; 

 length less than 6.8 mm. 225. cincticornis. 



del. Third segment at most with apex narrowly pale ; disk of pronotum 

 rather flat, the transverse depression slight and ill-defined. 

 e. Pronotum widest well behind the middle; sides of abdomen en- 

 tire or notched. 

 /. Granulation of head rough; length of second antennal segment 

 subequal to width of head, including one eye; front side 

 margins of pronotum straight, oblique and with variably 

 coarse teeth: form elongate. 226. proboscideus. 



//. Granulation of head smooth; length of second antennal seg- 

 ment equal to width of head including both eyes ; sides of 

 pronotum slightly curved and with very fine, irregular 

 teeth; form broad. 227. basalis. 



ee. Pronotum widest at middle; sides of abdomen rather strongly 

 crenate. 228. CONSORS. 



cc. Second antennal segment distinctly clavate, gradually enlarging 

 from near base to apex, rarely (fig. 36c), suddenly enlarged 

 in apical third. 

 g. Length of second antennal subequal to distance between eyes. 

 /;. Third antennal yellowish except at base; membrane hyaline, 

 often faintly maculate; apical angles of connexival segments 

 pale. 229. similis. 



hh. Third antennal concolorous; membrane dark with pale basal 

 spot, rarely entirely pale; general coloration nearly uniform 

 dark brown. 229a. var. centriguttatus. 



