NORTH AMERICAN HYMENOPTERA. 
55 
A. heliaiithi 9.— Black, iuclining to dull ferruginous; clypeus rather 
c osely and strongly punctured ; basal process of labruni short, triangular trun- 
cate or notched ; thorax clothed with long, dense, ochraceous pubescence, which 
conceals the surface, sparsely punctured with shallow punctures, enclosure of 
luetathorax hnely roughened; wings clear, hyaline, stigma small, fuscous, ner- 
vures pale testaceous, tegulm entirely pale testaceous; abdomen impunctate, or 
with fine sparse punctures, broad and slightly depressed apical margins of seg- 
ments rufo-piceous, apical margins of second, third and fourth segments with 
thin fascim of pale pubescence, often more or less interrupted on the disc, anal 
fimbna pale fulvous; legs dull ferruginous, posterior tibiie and tarsi yellowish 
S.— Resembles the female: clypeus yellow, antennm longer, flagellum dull 
testaceous beneath; all tibi® at apex, po.sterior tibia., exteriorly and all tarsi 
yellow; abdomen more punctured, broad apical margins of segments pale testa- 
ceous. Length 10—11 mm. & f .a 
Twelve females, eight males, taken on flowers of Helianthn^ grosse- 
serratiis, September T2th to 25th. 
A. solidagiiiis 9 . -Black ; clothed with thin, white pubescence • clypeus 
sparsely punctured, more strongly at tip; basal proce.ss of labrum deeply'bifid 
forming two teeth ; thorax sparsely and feebly punctured, thinly clothed with 
whitish pubescence, enclosure of metathorax finely roughened ; wings hyaline 
neryiires and stigma fuscoms, tegulfe piceous ; legs black, inclining to dull ferru- 
ginous, scopa white beneath, fuscous aboye; abdomen impunctate, or with only 
sparse, feeble punctures, apical margins of segments 2-4 with narrow fascia? of 
white pubescence, anal fimbria fuscous. Length 8—9 mm. 
% .—Resembles the female ; the clypeus pale yellow. Length 6—7 mm. 
Eight females, two males. I have taken it from September 8th to 
October 11th, on flowers of Solidago canadensis, S. lanceolata, Boltonia 
asteroides, Aster and Polygonum hydropiper. 
A. flavo-clypeata Sm. {= A. hipunctata Cress.) 
^ This bee flies in Spring. I have taken it from April 5th to Mav 
7th, on flowers of Stellaria media, Claytonia, virginica, Xanthoxylum 
americanum, Staphylea trifolia, Prumis serotina, Amelanchier cana- 
densis, Erigenia bulbosa, Saliz cordata and S. humilis. The sexes 
were taken in copula on Salix, April 10th. 
. *i*ise 9 . -Black, with an obscure greenish reflection, thinly clothed 
with pale pubescence; clypeus sparsely and feebly punctured, sometimes with a 
purplish reflection; basal process of labrum small and narrow, mandibles honey- 
ye ow in middle, rufo-piceous at tip, flagellum testaceous beneath ; thorax yery 
thinly clothed with pale pubescence, very sparsely and feebly punctured enclo- 
sure of metathorax rather strongly reticulated, unusually rough for a species of 
t IS group; wings long, yellowish hyaline, nervures, stigma and tegulte testa- 
ceous; legs dull ferruginous, often inclining to yellowish ; abdomen depressed 
impunctate, with an obscure greenish reflection, apical margins of segments pale 
testaceous segments 2-4 with apical fasciae of thin, pale pubescence, anal fimbria 
dirty white. Length 6 — 7 mm. 
