32 
[July, 
joint of the intermediate tarsi above. Posterior tibiae, except the glabrous enclosure 
at base, and the basal joint of the posterior tarsi, except at tip, clothed externally 
with white pubescence, that on the basal joint of the tarsi beneath fuscous ; claws 
yellow at the base ; calcaria pale testaceous, those of the posterior tibiae arising close 
together. Abdomen shining, delicately punctured ; a little white pubescence at the 
base, very delicate continuous white fasciae at the base of segments two to five, visible 
only when the abdomen is extended, a narrow white fascia at the tip of the third 
and fourth segments, widely interrupted on the third segment, and scarcely inter- 
rupted on the fourth ; the fimbria on the fifth segment white. The glabrous 
enclosure on the sixth segment black or pi eous, and with a smooth border. The 
apical margins of the ventral segments testaceous, and clothed with griseous 
pubescence. 
Numerous specimens taken at Waterbiirv, Conn., on the flowers 
of Lysimachia ciliata , from July 3rd to 22nd; of Rhus glabra, from 
July 22nd to August 7th ; and of Archangelica hirsuta, August 14th. 
Var. — The base of metathorax without punctures and shining, the tegulae dark 
piceous. 
One specimen taken at New Haven, Ct., on the flowers of Rhus 
typhina , July 2nd; and one specimen taken at Waterbury, Ct., on the 
flowers of Lysimachia ciliata, July 22nd. 
Var. — Differs from the preceding variety in having the tegulae testaceous. 
Two specimens taken at New Haven, Ct., on the flowers of Rhus 
typhina , June 21st. 
Var. — No hairs on the clvpeus, tegulae dark piceous, base of metathorax without 
punctures and shining, scutellum fringed behind with griseous hairs, the ferruginous 
stripe under the intermediate tarsi not extending upon the first joint, basal joint of 
posterior tarsi with fuscous hairs externally upon its apical half, the white fasciae 
upon the abdomen obsolete, the fimbria mostly fuscous, and the apical margins of 
the ventral segments dark piceous. 
Two worn specimens taken at Waterbury, Ct., on the flowers of 
Lysimachia ciliata , together with a specimen of the typical form, 
July 17th. 
S . Length, in., expanse, to in. Antennae nearly as long as the head 
and thorax ; flagellum fulvo-testaceous beneath ; the scape entirely black, with a 
fringe of white hairs on each side, and with shorter hairs in front ; second joint of 
the flagellum narrowed at base, and scarcely longer than the first, third joint scarcely 
onc-half the length of the second, as thick as the apex of the second, joints four to 
eleven each equal in length to joints two and three taken together, but not so thick 
as the third joint, last joint a little longer than the eleventh. The face below the 
insertion of the antennae, and a spot at the base of the mandibles, yellow ; labrum 
black ; pubescence on head and thorax longer than in the female, white ; thorax 
shining, punctured, base of metathorax polished and without punctures ; tegulae 
testaceous ; nervures and stigma testaceous; pubescence on legs white, that on the 
