292 
Honiinoxious A rthropods 
mm. Otherwise marked when the wings are unspotted, 
n. Wings unspotted. 
o. Petiole of the first forked cell (R 2 ) more than a 
third the length of the cell. Mississippi 
valley.A. walkeri 
oo. Petiole of the first forked cell a third the 
length of the cell. Md . A. barberi 
nn. Wings spotted. 
o. Front margin of the wings with a patch of 
whitish and yellow' scales at a point about 
two-thirds or three-fourths of the W’ay from 
base to apex of wing. 
p. Veins of the wing with many broad obovate 
outstanding scales; thorax with a black 
dot near the middle of each side. W. I. 
.A. grabhami* 
pp. The outstanding scales of the wings rather 
narrow, lanceolate. 
q. Scales of the last vein of the wings white, 
those at each end black; R4+5 black 
scaled, the extreme apex w'hite scaled. 
Widely distributed north and south 
(fig. 131 ) .A. punctipennis 
A dark variety from Pennsylvania has 
been named A. perplexens. 
qq. Scales of the last vein of the wing white, 
those at its apex black; R4+5 w'hite 
scaled and with two patches of 
black scales. South and the tropics. 
A. franciscanus and pseudopunctipen- 
nis* 
00. Front margin of the wings wholly black 
scaled. 
p. Last (anal) vein of the wings white scaled 
with three patches of black scales (fig. 
132). New r Jersey to Texas. A. crucians* 
pp. Last vein of the w'ings wholly black 
scaled. 
q. Widely distributed north and south 
(fig. 130), (= maculipennis) . 
. A. quadrimaculatus* 
qq. Distributed from Rocky Mountains 
westward. A. occidentalis 
kk. Scutellum distinctly trilobed. 
1 . Cell R 2 less than half as long as its petiole; thorax 
with metallic blue scales; median lobe of the 
scutellum not tuberculate; few small species which 
are not common. Uranotaenia Arrib. 
