24 
AMERICAN SPECIES OF ARADUS (hEMIPTERa) 
10. Third antennal segment largely yellow; body black; in’onotum two- 
thirds as long as head; abdomen almost circidar. 
IG. curticollis Bergroth 
Third antennal segment concolorous, or pale toward apex only; body 
brownish; jironotum longer 11 
11. Scntellum pentagonal, the sides moderately elevated; color generall}' 
almost uniform brown; female genital lobes as viewed from above 
either very short, transverse (fig. lOa), or long and witlely separated 
fig. 11a) 12 
Scntellum triangular, sides generally strongly elevatetl; color often 
variegated 13 
12. Head longer than jn’onotum; sides of scntellum elevated to apex. 
10. behrensi Bergroth 
Head as long as pronotum; sides of scutellum scarcely elevated beyond 
middle 11. robustus Idiler 
(a) Nearty uniform dark brown variety robustus tyincal 
(b) Narrow postero-lateral margins of i)ronotum, apex of scutellum 
and most of corium yellowish; abdomen reddish brown above. 
variety insignis var. nov. 
13. Width of third antennal segment about equal to one-half distance between 
eyes; .size small, length, 4.G mm 7. coarctatus Heidemann 
Width of third segment much less; larger, length over 5.4 mm 14 
14. iSides of pronotum serrate or toothed 15 
Sides of i)ronotum entire or finely granulate IG 
15. Third anfennal segment more than twice longer than broad; second 
nnicolorous or with very slight palene.ss at apex. 
8. fuscomaculatus Stal 
'I'hird segment less than twice longer than broad. 
9. pannosus Van Duzee 
(a) Second antennal segment with a broad yellow ring at apex. 
variety pannosus tyi)ical 
(b) Second segment nnicolorous variety incomptus var. nov. 
Ki. Second antennal segment distinctly shorter than distance between eyes; 
only brachypterous form known 12. intectus sp. nov. 
Second segment at least as long as distance lietween eyes; only macro- 
pterous forms known 17 
17. Pronotum wide.st in basal third; rostrum reaching mesosternum; genital 
lolx^s shoi’t, truncate posterif)rly 15. apicalis Van Duzei' 
Pronotum widest at or near middle; rostrum shorter; genital lobes long, 
rounded posteriorly IS 
IS. Sides of .scutellum slightly rai.sed, at middle lower than transver.‘<e basal 
elevation; pronotum widest behind middle; median carinae nearly 
PJi-CiIlel 13. duzeei Bergroth 
Sides ol .sculellum strongly rai.sed, higlu'r than ba.sal elevation; iironotum 
wide.st at middhq iiKslian carinai' sinuate. . 14. iiiiplanus sp. nov. 
