1896. ] Flowers and [nsects. 73 
HyMENOPTERA—A fide: (1) Apis mellifica L.,¥; (2) Ceratina dupla 
Say 2; (3) Megachile brevis Say 4; (4) M. mendica Cr.?; Andrenide: 
(5) Andrena solidaginis Rob. ¢; (6) Agapostemon radiatus Say ¢ 9; (7) 
Halictus coriaceus Sm. 4, freq.; (8) H. lerouxii Lep. ?; (9) H. fasciatus 
Nyl. 9; (10) Colletes armata Pttn. 3; (11) C. eulophi Rob. 4; (12) C. am- 
ericana Cr. $9, freq.; (13) C. latitarsis Rob.9; (14) Prosopis pygmaea 
Cr. 8; Vespide: (15) Polistes pallipes Lep.; (16) P. metricus Say; Zx- 
menid@ : (17) Odynerus capra s.; (18) O. dorsalis F.; (19) O. arven- 
sis Sauss.; Crabroni rabro texanus Cr.; trifasciatus 
Say; (22) Thyreopus tumidus Pack.; (23) Anacrabro ocellatus Pack.; 
(24) Oxybelus 4-notatus Say; (25) O. emarginatus Say; Philanthide: 
ica Lep.; (37) Sphex ichneumonea L.; (38) Priononyx thome F.; 
(39) P. atrata. Lep.; Pompilide: (40) Pompilus philadelphicus Lep.; 
(41) P. algidus Sm.; (42) P. biguttatus F.; (43) P. navus Cr.; (44) Cer 
cincta F.; Musillide: (47) Sphaerophthalma macra Cr.; Chrystdide: 
i Holopyga ventralis Say; (49) Hedychrum wiltii Cr.; (50) H. vio- 
ceum Brullé; (51) Chrysis texana Grib.; (52) C. nitidula F. 
‘ WPTERA—Bombylide: (53) Systoechus vulgaris Lw.; Conopide: (54) 
Onops brachyrrhynchus Mcq.; Syrphide: (55) Paragus tibialis FIl.; 
ride: (70) Chauliognathus ennsvlvanicus DeG.; Chrysomelide: (71 
nsonyeha limbicolis ao pallipes Cr.; octal ales (72) t useo. 
tig PALUSTRIS L.—This is a low shrub blooming quite 
‘iy resi 18th to April 13th, and bearing small greenish 
of mage Owers which appear before the leaves. At the ends 
ehctiat tanchlets are situated buds of about four hairy scales 
leaf-bud » In Cases observed by me, three flower-buds and a 
the bud he flowers are pendulous and are sheltered by 
. scales which form a hood above them. 
Ree a tube is about 5™™ long and is truncate, with ob- 
the ovar es. The bottom of the tube is completely filled by 
all the dd So that with a proboscis 4" long a bee may obtain 
diets, €ctar, which I think is secreted by the tube. For the 
ce of about 1™" from the ovary to the point where the 
itt. 2, ve inserted the i : stint 
itis Wider by tube is narrow. Above that p 
