somewhat oval-shaped fuscous spot on the apex. Frequents borders

486
CONNECTICUT GEOL. AND NAT.
HIIST.
SURVEY.
[Bull.
Length 4-5 mm., width 2-2.5 mm.; slightly larger than but
structurally very close to nebutlosus; olivaceo-testaceous to brownish and blackish, cuneus red, membrane clear, a rather distinct
somewhat oval-shaped fuscous spot on the apex.
Predaceous; occurs nmost frequently on Alnus rugosa.
New Haven, i5 May (A. B. C.); Orange, 2i May (A. B. C.); Port-
land, Ix May (B. H. W.).
D. (Camptobrochis) histrio Reuter.
Callicapsus histrio Reuter. Ofv. Kongi. Sv. Vet.-Akad. Forh., xxxii, No.
9, 75, I876.
i8th Rept. State Ent. Minn., ioo, i92i.
Length 4.5-5 mm., width 2-2.3 mm.; dorsum bright red, clavus,
pair of large spots on corium and on pronotum black.
Frequents borders of ponds; probably predaceous.
Long Island, N. Y.
*D. (Camptobrochis) nubilus Knight.
i8th Rept. State Ent. Minn., io6, i921.
Length 4.2-4.8 mm., width 2-2.3 unt.; male more elongate than
female, apical half of membrane usually heavily infuscated; disk
of pronotum fuscous to blackish behind the calli, the median line
pale; femora biannulate with pale on the apical half.
Occurs on Pin-us strobus; probably predaceous.
Portland, May (B. H. W.); Rainbow, I3 June (B. H.:W.).
Key to Species of Group B.
I.
2.
3.
4.
5.
6.
Tibiae banded with fuscous or pale .......2
Tibiae uniformly pale or yellowish ......................-- ?7
Membrane with a distinctly rounded fuscous spot on the apical
half, frequently connected at base by a fuscous streak extending
down from between the areoles, thus leaving a large pale spot
each side of middle and bordering apex of cuneus .3
Membrane usually somewhat infuscated but not as described above 4
Calli solid black, a broad piceous ray behind each, in pale specimens the calli may be somewhat brownish but in such case the
median line and margins of the disk are distinctly pale, leaving
a dark brown ray behind each callus; hemelytra with piceous on
borealis
clavus ard corium, embolium pale ...........
Calli more or less invaded with brownish or pale, distinct rays not
apparent behind calli; hemelytra and pronotum more uniformly
fasciolus
colored, either fulvo-testaceous or dark brownish .
Rostrum extending slightly beyond the posterior margins of the
hind coxae; membrane with the apical half scarcely infuscated,
femora pale but with two distinct blackish bands near the apex,
hind tibiae biannulate wit fascous on the basal half . grandis
Rostrum scarcely attaining the posterior margins of the hind coxae;
membrane, femora, and hind tibiae not having the above combi...
nation of characters ..........................S.........
5
Pemora uniformly dark on the apical half, likewise the basal part
in darkest specimens; venter distinctly reddish, sometimes dark
chestnut red, shining ................. betulae
Femora with the apical half distinctly banded or entirely pale .... 6
Second antennal segment with prominent pale exserted hairs, in
length equal to three times the thickness of the segment; prono-