82 
AMERICAN SPECIES OF ARADUS (IIEMIPTERa) 
fireatcr than width of head between eyes; rostrum extending over anterior 
third of itiesosternum. Pronotum (fig. 44d) moderately convex, transversely 
depressed before middle, the lateral margins narrowly and evenly ex])anded, 
not strongly reflexed, finely and regularly granulate; carinae moderately 
elevated. Seutellum longer than pronotum (2!) to 19), elongate, triangular 
(29 to 20), sides strongly and shar!)ly elevated; apex acute; (fiscal elevation 
broad, rouiuh'd, extending beyond middle; base depressed. Hemielytra 
( cT 9 ) extending almost or (luite to a])ex of abdomen, corium to base of 
fifth segment; exocorium not expanded at base; corium with numerous trans- 
verse veins, some of the cells more or less obscurely hyaline; endocorium 
with fine transverse wrinkles; corium wider than seutellum at level of middle 
of latter. 
cf (fig. 44b). Fifth ventral segment slightly longer than sixth, the apical 
margin of the sixth transverse, sinuate; genital segment large, moderately 
convex, the lobes slan’t; abdomen oblong, not broader than hemielytra. 
Length, 4.5 to (i mm. 
9 (fig. 44a). Posterior margin of dorsal genital segment transverse, 
arcuate oidy laterally; lobes as viewed from above (fig. 44e) rather long, 
posterior margin convexly arcuate; abdomen narrowly oval, wider than 
hemielytra, lateral margins entire. Length, 5 to 9.4 mm. 
Typt' siicciiiiens (Westrogothia, Finland) not located. 
This is a true holarctic species, of very wide distribution, as 
commonly met with in the New World as in the Old. It is dis- 
tinguished especially by the comiiaratively stout antennae with 
second segment narrowed toward l)ase, pronotal structure, and 
genital characters. The thickness and flattening of the antennae, 
and the posterior curvature of the female genital lobes are vari- 
able within narrow limits. Through the kindness of Air. Blair 
! have been able to examine two specimens from Walker’s type 
series of fenestnUm. One, agreeing with the type specimen, is 
typical liujubns, the other is abbas; which confirms statements 
to the same effect made by Bergroth.-^ 
Aradus lugubris varief y nigricornis Heut('r 
1900. Arddus liu/Khri.s var. nujriconiis Rculcr, Medd. Soc. Fauna ct Flora 
Fcimica, xxvi, p. 134. 
Distrihiilion . — With the ty])ical variedy. 
Dencriplion . — Like the ty])ical variety, excejjt that the antennae are en- 
tirely black. 
1 his vai'iety is almost as common as tlu' typical form, which 
(‘xhibits iniergradational variation in the amount of white on 
(he aidennain It is not ol g(‘ographical signiticanci', as it occurs 
'“■‘Fanad. J'lntom., xlv, |). 5, (1913). 
