SUBFAMILY I. — ARADIN^. 307 



c. Pronotum widest before middle; second antennal distinctly more 

 slender than front femora. 234. uniformis. 



cc. Pronotum widest behind middle; second antennal slightly thicker 

 than front femora. 235. insignitus. 



bb. Third antennal segment dark; second segment distinctly clavate, 

 shorter than head; length, 6.2 or more mm. 

 d. Pronotum widest well behind middle (fig. 38d). 236. borealis. 

 dd. Pronotum widest near middle (fig. Aid) ; sides of scutellum 

 strongly elevated; color black. 237. tuberculifer. 



aa. Corium slightly or not at all dilated at base, width of elytra at that 

 point about equal to that of pronotum. 

 e. Scutellum broad, distinctly pentagonal, its sides strongly and 

 sharply elevated ; sides of pronotum subparallel behind the 

 middle; length about 6 mm. 238. funestus. 



ee. Scutellum narrower, elongate-triangular, its sides usually but 

 slightly elevated; sides of pronotum behind middle rarely 

 subparallel ; length less than 6 mm. 

 /. Third antennal segment not more than one-half the length of 

 second (figs. 44c — 51c). 

 g. Antennae moderately robust, the second segment strongly 

 narrowed in basal third (fig. 44c) ; scutellum at middle 

 narrower than corium at same level. 

 h. Membrane maculate with brownish; sides of scutellum 

 strongly elevated ; third antennal in part white or wholly 

 black; connexivum narrowly or not at all exposed. 



239. LUGUBRIS. 



hh. Membrane white, immaculate; sides of scutellum feebly ele- 

 vated; third antennal brown; connexivum broadly exposed. 



240. BRUNNICORNIS. 



gg. Antennas slender, second segment slightly and gradually en- 

 larged from near base (fig. 49c), sometimes abruptly 

 thickened near apex. 

 %. Pronotum widest well behind the middle, its posterior side 

 margins rounded or nearly parallel (figs. 47d — 49d). 

 j. Antenna? biannulate with white; corium not hyaline. 

 k. Elytra of both sexes not exceeding the tip of abdomen; 

 genital lobes of female extending beyond second genital 

 segment (fig. 47a). 241. abbas. 



kk. Elytra of female (male not known) extending well be- 

 yond apex of abdomen ; genital lobes of female trun- 

 cate, not extending beyond tip of second genital seg- 

 ment (fig. 48a). 242. breviatus. 

 jj. Antenna? not biannulate; corium largely hyaline, without 

 distinct transverse veinlets. 243. gracilicornis. 

 ii. Pronotum widest slightly behind middle, its posterior side 

 margins straight and converging; color black; apical 

 third of third antennal segment pale. 



244. UNIANNULATUS. 



//. Third antennal segment about two-thirds as long as second; 

 antenna? pale brown. 245. falleni. 



