30 
AMERICAN SPECIES OF AIIADUS (iIEMIPTEKa) 
genital lobes, yellowish; menibraue with irregularly reticulate i)ale markings; 
legs yellow, femora and tibiae with broad l)rown band at middle. 
Head about equal in length and breadth, slightly shorter than pronotum 
on median line; tyhis short, its sides parallel; impressions of vertex elongate, 
diverging anteriorly; preocular tubercles distinct; antennifcrous sjjines 
stout, moderately divergent, without lateral tooth; {)ostocular tubercles 
obsolescent; antennae (fig. Ic) moderately slender, cylindrical, somewhat 
shorter than head and ))ronotuni together, the first segment reaching middle 
of tylus, the second about as long as distance between eyes; rostrum exten- 
ing a little beyond base of prosternum. Pronotum (fig. Id) with lateral 
margins very finely crenulate; median carinae strongly elevated. Scutcllum 
longer than i)ronotum (45 to 33), elongate, triangular, with short me<lian 
Carina at base; lateral margins scarcely elevated. Ilemielytra (ci’)extending 
nearly to apical angles of sixth abdominal segment, connexivum moderately 
exposed, corium reaching beyond middle of fourth segment; hemiclytra (9) 
to genital segment, connexivum l)roadly exposed, corium to liase of fourth; 
exocorium very strongly expanded at base; mesocorium with two or three 
distinct transverse veins, endocorium with one or two. Abdomen ovate, 
broad, the lateral margins almost entire. 
cf (fig. lb). Fifth ventral segment one-half as long as sixth; genital seg" 
nient short, moderately convex. Length, S.4 mm. 
9 (fig. la). Posterior margin of dorsal genital segment truncate at middle. 
Length, 9 to 10 mm. 
Type specimens (Indiana) lost. 
This large and rare species is easily distinguished by antennal, 
pronotal, and genitalic structure. It is normally fully winged, 
but one specimen in the Cornell University collection is incipi- 
ent ly brachypterous. The hemielytra are moderately narrowed 
and shortened, considerably less so than in intcctus (fig. 12d), 
and extend nearly to the posterior margin of the fifth abdominal 
s(‘gnient; the corium is little modified except in length, extend- 
ing sonauvluit beyond the middle of the third segment; the mem- 
brane is about half the normal size, with somewhat reduceil 
venation. Shoid hind wings are pn^sent and the posterior lolx' 
of t he pronotum exhibits a slight tlattening. 
2. Aradus (Aradus) crenatus Say (Plate I, fig. 2.) 
bS32. Arddufs creiuil uf; Ihd. Hem., p. 2S; Clompl. W rit., ii, j). ;t5(). 
DistrihuHou.. — (iuioimc: 1 lemmiiigfonl, VIII, 30, 1910 (.1. I. Ih-auhie); 
.Moidreal, VIII, 1901. Ontaiuo; (Jrimsby; Ottawa, IX, 211, 1907 ((’. II. 
5’oung); Pre.ston (II. (Jrolp; Ridgeway (Kilman). New Youk: Cat.skill; 
Ithaca, V, 22, 1914; Keene \'all(\y, .Vdirondacks, IX, 1917 ((1. P. Fiigelhardt ) ; 
