50 
AMERICAN SPECIES OF ARADUS (hEMIPTERA) 
jn-eocvilar and ])ostocular; antenniferous spines strong, acute, divergent, 
with distinct lateral tooth; antennae (fig. 18c) moderately stout, about as 
long as head and pronotum together, the first segment reaching scarcely to 
middlj? of tylus, the second ecpial in length to distance between eyes; rostrum 
extending over apical one-third of mesosternum, sometimes to middle. Pro- 
notum (fig. 18(1) moderately convex ])osteriorly, lateral margins strongly 
expanded, slightly reflexed, the explanate portion not reaching anterior angles; 
carinae coarsely granular, strongly elevated posteriorly. Scutellum longer 
than pronotum (2‘) to 20), broad, sides nearly parallel to middle, then straight 
to acute apex, strongly and shari)ly elevated, disc flat, transversely elevated 
at base, llemielytra (d’) extending to genital lobes, rather strongly nar- 
rowed posteriorly, exposing disc of abdomen at sides, corium almost to ai)ex 
of fourth; ( 9) reaching about to middle of dorsal genital segment, similarly 
narrowed, corium to middle of fourth; l)asal expansion of excorium moderate, 
evenly rounded, denticulate, slightly reflexed; mesocorium with one, endo- 
corium without distinct transverse veins. 
cf (fig. 18b). Fifth ventral segment slightly shorter than sixth; genital 
segment short, moderately convex; abdomen ovate, broadest behind middle, 
margins entire. Length, 4 to 5 mm. 
9 (fig. I8a). Posterior margin of dorsal genital segment usually broadly 
rounded, sometimes nearly straight, or slightly emarginate at middle; al)do- 
men very broad, almost circular, lateral margins entire. Length, 5 to 6 mm. 
Type specimen (South California) in Stockholm Museum. 
Since Hnhbard found this species in large numbers at Palin 
Springs, California, it has very seldom bet'll taken. It is closely 
related to depictus, from wdiich it is readily distinguished by 
the shape of the scutellum; it differs from all others in the colora- 
tion of the antennae. Bergrothi-*, in descriliing the female, places 
the species in Laiiorte’s group Piedosoina, which is typihed by 
the European depressuf^ Fabi'icius, because of the presence of an 
angulated carina which the fifth ventral segment is said to bear. 
This carina is a very striking feature in depressus, but in con- 
cuinm it is no more strongly developed than in f u^sconuicuddus, 
diizcci, (ipicaUs, or dcj)ictm, and is, in fact, scarcely notici'able. 
The anteriorly lobed pi-onotal margins, genital peculiarities, and 
shoi't second antennal segment of depressus are not seen in con- 
cin.iius and hence I do not think that the two can be ])lac('d in 
lh(! same gi'oup. If this view is correi't the subgenus JHcstosotua 
of Van Duzee’s C'atalogue''' is to be removed from our list. 
" Lamid. Fidom., xxxviii, p. I‘)8, PH)(t. 
''’('ut. Ilcmi])., p. 13.'), PI17. 
