102 
AMERICAN SPECIES OF ARADUS (hEMIPTERA) 
llolotype . — 9; Iluacluica jMoimtains, Arizona, No. 202, Mu- 
souin of the Brooklyn Institute of Arts and Sciences. 
This s]K'cies is related to niger, from which it is distinct in 
antennal and pronotal structure, larger size, and liroader form. 
It is pi'obahle that brachypterous forms will be found, having 
a different pronotal shaiie but readily recognized by antennal 
characters. 
60. Aradus (Quilnus) heidemanni Bergroth (Plate VII, fig. 60.) 
1006. Aradus llndemanni Bergroth, Can. Ent., xxxviii, p. 200. 
Distrihutian . — British Columbia: Bear Lake, London Hill Mine, Ml, 
21 (R. P. Currie); Kokanee Mountain, 9000 feet, VIII, 10, 1903 (R. P. 
Currie); \'ietoria, Vaneonver Island (G. \\ . Taylor). \t ashington: Mount 
Rainier, Paradise Park, 6000 feet, VH, If) to 31, 190,5 (K. C. Van Dyke). 
Oregon: Astoria, V, 2.5, 1902; Dilley. California: Carville, Trinity 
C'onnty, V, 7, 1913 (E. C. Van Dyke); Mount Hood, 6000 feet. VUl, 19, 
1916 (G. P. Engelhardt); Mohave (Calif.?). New Mexico: Clonderoft. 
t'oLORADo: Colorado Siirings, VUI to IX (.1. E. Jack). 
Description.— \Pi\\ dark brown to grayish black; membrane sometimes 
pale. 
Head about as long as broail; tylns short, comjiressed, narrowed toward 
ajiex; impressions of vertex rather deep, slightly divergent, connected pos- 
teriorly; preociilar tubercles small, acute, antenniferons spines acutely conical, 
moderately divergent, the lateral tooth small or absent; postocnlar tubercles 
lirominent, rounded; antennae (fig. 60(0 moderately .slender, cylindrical, 
about as long as head and pronotuni (/. macrop.) together, the first segment 
r('aching anterior third of tyhis, length of second a little less than distance 
between eyes (IS to 20); rostrum not (piite reaching base of head. Pro- 
notal margins irregularly granulate. Abdomen broadly oval, the margins 
slightly notched. 
Macropterous form, cT 9 (hs- 60d.l). Pronotuni moderately convex 
posteriorly, shorter than head (30 to 2.5), lateral margins moderately ex- 
panded and slightly ridlexc'd, sinuate; carinae distinct. Sciitellum long('r 
than head, sides slightly curved, rather strongly elevated; disc flat to base, 
with a slight central eh'vation. Henii('lytra moderately narrowed, exjiosing 
connexiviim, (cf*) extending to genital lobes, coriiim to base of fourth S('g- 
ment ; ( 9 ) to base or luauiy to ajicx of dorsal genital segment, coriiim to bas(' 
of fourth; exocoriiim moderately ('xpanded at base; ni(‘socoriuni with one or 
two, endocorium with one or without distinct tran.svcrse veins; veins of 
membrane sonu'what branched toward ajiex. 
Stenoptcrous form, cf (fig. t)0d.3). Pronotum reduced, much shorter 
than head (20 to iltl), flattiMied, depn'ssed posteriorly, latc'ral margins st might , 
not expandi'd; carinae indistinct, except median pair in anterior two-thirds. 
Seut(‘llum as long as head, the sides obtiisi'ly cleval(‘d; disc uniformly d(‘- 
pressed. Ilemielytra greatly narrowed, ('xti-nding wi'll oviu' gtuiital sc'gment ; 
membrane distinct; hind wings absmit. 
