28 
AMERICAN SPECIES OF ARAUUS (hEMIPTERa) 
49. Antennae pale brown; antero-lateral margins of pronotum straight; 
male genital segment with ventral orihce (fig. 53b). .53. fallen! St&l 
Antennae black and white; antero-lateral margin.s of jironotum moder- 
ately sinuate; male segment without orifice. . . .54. snow! Van Duzee 
50. Second antennal segment at ba.se nearly as Inroad as an eye, strongly 
flattened, narrowed oidy at extreme ba.se (fig. 4(3cj (South America). 
4G. angustellus Blanchard 
Second antennal segment otherwise 51 
51. Antennae moderately robust, the second segment strongly narrowed in 
basal third (cf. fig. 44c) 52 
Antennae slender, the second .segment slightly and gradually enlarged 
from near ba.se, sometimes rather abrui)tly thickened near apex (cf. 
figs. 49c, 52c) 53 
52. Scutellum at middle narrower than corium at same level, the discal eleva- 
tion e.xtending beyond this point; female genital lobes convexly arcu- 
ate })o.steriorly (fig. 44e) 44. lugubris Fallen 
(a) Ai)ex of third and sometimes of second antennal segment white. 
variety lugubris typical 
(b) Antennae wholly black variety nigricornis Reuter 
Scutellum at middle wider than corium, the di.scal elevation not extending 
beyond this point; female genital lobes concavely arcuate posteriorly 
(fig. 45e), 45. arizonicus sp. nov. 
53. Pronotum widest well behind middle, the jiostero-lateral margins rounded 
or nearly parallel (cf. figs. 47d, 49d) 54 
Pronotum widest slightly behind middle, the postero-lateral margins 
straight and distinctly convergent (cf. hg. .50d) 5b 
54. Antennae biannulate with white; corium not hyaline 55 
.Vntennae not biannulate; corium largely hyaline, without distinct 
transverse veinlets 49. gracilicornis Stal 
55. CJenital lobes of female extending beyond second genital segment; male, 
fig. 471) 47. abbas Bergroth 
Clenital lobes of female truncate, not extending beyond apex of .second 
genital .segment (fig. 4Sa); male unknown.. 4S. breviatus Bergroth 
5b. (’olor brown, pronotum and corium extensively marked with yellow; 
length of .second antennal segment eipial to width of head between 
eyes 50. marglnatus Filler 
((olor black, jironotum concolorous; second segment longer 57 
57. Third antennal .segment pale in apical third; corium not hyaline. 
51. uniannulatus sj). nov. 
'I'liird .segment entirely black; corium largely hyaline. 
52. evermanni \'an Duzee 
5S. ,\nt(‘nnae thicker than front h'lnoni; (lost ocular tubercles ob.solete. . . .59 
-Antennae' more sk'nder than front femora; iiostocular tulx'rcles distinct. 
bO. heidemanni Bergrot h 
