NORTH AMERICAN HYMENOPTERA. 
65 
piceous ; legs black, clothed with thin pale pubescence, apical joints of tarsi tes- 
taceous; abdomen slender, sides parallel, fascim wanting, a little thin pale pubes- 
cence on the sides at apex, ventral scopa white. Length 6 — 8 inm. 
.—Resembles the female; the head very much shorter and smaller, as also 
the mandibles and labrum; antenme longer, reaching to metathorax, flagellum 
dull testaceous beneath ; seventh segment of abdomen with two long spines in 
middle and a short blunt one on each side. Length 5—7 mm. 
Twenty-seven females, twenty-eight males, taken on May 29th, on 
flowers of Philadelphus grandiflor^is. 
MEGACHIL,E. 
rufinianiis 9.— Form as in M. pugnata and M. inimica ; head large 
long, strongly produced hehiud eyes, form much as in M. pugnata, but without a 
spine under cheek ; clypeus very broadly and deeply emarginate ; labrum as long 
as mandibles, broad and three lohed at apex, strongly produced at tip above into 
a pyramidal process; mandibles long and very slender, three toothed at tips- 
mesothorax closely, coarsely and strongly punctured, clothed with short thin’ 
black pubescence, bearing anteriorly two short lines of white pubescence lying 
about 1 mm. apart: scutellum more coarsely and sparsely punctured - wines 
fusco-hyahne. the marginal cell clouded along the costal margin - legs’ black 
slender, tibiae spiued at apex exteriorly; abdomen coarsely and strongly punc- 
tured, more closely at base, sides and apex, more sparsely on disc, triangular 
patch on each side of first segment, apical margins of segments 2-4 and base of 
sixth with white pubescence, ventral scopa white, except on sixth segment where 
it is black. Length 11 — 13 mm. 
% .-Resembles the female; the head is much smaller, the face closely clothed 
with white pubescence; the mandibles and labrum are shorter, the latter more 
rounded at tip and not strongly produced above; the auterior legs simple, the 
coxfe unarmed ; anterior femora and tibi® rufous in front, the carina of sixth 
segment emarginate in the middle ; wings more hyaline than in female Lensth 
9 — 11 mm. ^ 
Five females, eleven males, taken from June 26th to July 19th, 
on flowers of Pnoralea onobrychis, Lobelia leptostachjs and ‘ Nepeta 
cataria. 
XE.\OGEO!i$S4. 
X. ipoiiicea-: 9.— Black, the face, vertex, thorax above, and base of first 
segment of abdomen clothed with bright fulvous pubescence; clypeus thinly 
clothed with appressed, glittering yellow pubescence, rough, with shallow punc- 
tures, apex with a broad shallow emargiuatiou on each side : mandibles orano-e- 
.vellow, black at base and at extreme tip; flagellum dull ferruginous; cheeks and 
thorax beneath with pale pubescence ; thorax above with very dense, bright 
fulvous pubescence; wings fusco-hyaline, nervures black, tegul® reddish testa- 
ceous; legs black, apical joints of tarsi dull ferruginous, tips of claws black 
tooth of hind claw small, short; hairs on front legs paler, on middle and hind 
pairs more fuscous, scopa thin, with the hairs black at base, pale at tips; abdo- 
men black, opaque, with shallow punctures, first segment at base with pubescence 
TRANS. AM. ENT. SOC. XVIII. 
(9) 
APRIL, 1891. 
