40 
AMERICAN SPECIES OF ARADUS (iIEMIPTERA) 
ments, and narrow inner marfiins of »:cnital lol)es, pale reddish or yellowish 
brown; nieinbrane dark, ])aler at base and sometimes along some of the 
veins; rostrum and legs paler, femora with broad median ami narrow apieal 
dark rings, tibiae with broad median dark band; ventral surface of abdomen 
dark brown, with oliseure jialer spots. 
Head slightly broader than long (28 to 27), longer than ])ronotum (27 to 
23); tylus rather short, enlarged at middle and again toward base; iinjiress- 
ions of vertex rather broad, more or less distinctly semilunate, connected 
posteriorly; jireocular tubercles distinct, obtuse or rarely subacute; antenni- 
ferous siiines very short and stout, conical, the lateral tooth minute or absent ; 
postocular tubercles obtuse, rounded; antennae (fig. 10c) moderately robust, 
minutely and evenly granulate, almost as long as head and pronotum together, 
the first segment extending a little beyond middle of tylus, the second as long 
as distance between eyes; rostrum extending about to base of prosternum. 
Pronotum (fig. lOd) with lateral margins rather strongly expanded and 
moderately reflexed, the lateral teeth usvially coarse, variable, rarely almost ob- 
solete; carinae distinctly e1evate<l. Scutellum of rather variable shape, 
more or less distinctly pentagonal, broad, much longer than pronotum (3.'j 
to 23), sides moderately elevated, ajiex acute or rather obtuse; basal eleva- 
tion transverse, obtusely carinate, extended a little posteriorly at middle. 
Ilemielytra (cf) extending to base of genital lobes, rather broad, covering 
abdominal disc, ( 9 ) reaching about to middle of dorsal genital segment, 
more strongly narrowed; corium extending about to middle of fourth eonnexi- 
val segment; exocorium moderately expanded, mesocorium with one, endo- 
corium with one to several distinct transverse veins. 
cf (fig. 10b). Fifth ventral segment slightl}' longer than sixth (11-10); 
genital segnumt short, strongly convex, the lobes short, truncate; abdonum 
oval. Length, o.2 to fi.7. 
9 (fig. 10a). Posterior margin of dorsal genital segment shallowly emargi- 
nate at middle; abdomen broadly oval, sometimes almost circular. Length, 
() to 7 mm. 
Type sliccimens (Upper Soda Springs, California) iii Berg- 
rot h’s collection. 
This Pacific Coast species, the types of which Dr. Bergroth 
has kindly sent to me for study, is variable in details of coloration 
jind of pronotal and scaitellar struct tire, as well as in the 
shape of the female abdomen. It is readily distinguished from 
(dose allit'S by the striudure of the antennae, gxMieral shape' of 
the pronotum, and genitalic feature's. Van Duzec"’ eU'seribes 
two incipient ly brachy])t('i'ous ('xami)l('s, in whiedi the' lu'iuie'lytra 
e'xte'iid to the' base' of the' fifth abdominal se'gnu'ul. 
llniv. of (';d., Tech. Pulls., tint., i, p. 23;>, IhU). 
