114 Trans. Acad. Sci. of St. Louis. 
Hymenoptera — Apide: (1) Apis mellifica L. 8, s.,ab.; (2) Bombus 
ar ee: Oliv. 9, s.; (3) B. americanorum F. 9,8.; (4) B. pennsylvan- 
us DeG. 9, s.; (5) B. separatus Cr. 9, 8.; (6) Ceratina dupla Say 9, 8 
aa c. p., ab.; (7) Megachile montivaga Cr. 6, s., freq.; (8) M. brevis Say 
oe, s. and p.; (9) M. mendica Cr.J'9, s.; (10) Alcidamea producta Cr.2, 
S. and c. oh ; — Andronicus cylindricus Cr.¥‘, 8.; (12) Heriades carinatum 
Cr. dc. p., freq.; (13) Osmia distincta Cr. 9, s8.; (14) Coelioxys 8- 
dentata as 6'8.; (15) Calliopsisandreniformis Sm. ¢'9,8.; Andrenide: (16) 
Agapostemon nigticor nis F. 9, s. and c. p., ab.; (17) Augochlora pura Say 
Y, 8. (is) Halictus fanciers Nyl. 9,8. and ¢. p.; (19) H. pilosus Sm. 
Ss. — c. p.; (20) H. confusus Sm. 9, s. and c. p., ab.; (21) H. stultus Cr. 
and c. p., freq.; Sphecide (22) Ammophila procera Klug., 8., ab.; (23 
A. nteroen Lep., 8.; (24) A. pictipennis Walsh, s.; (25) Pronony® atrate 
ep., 
Tubitopiors< Shapaeans (26) Pieris protodice pt. (27) P. rape 
L.; (28) Colias oe Godt.; (29) Danais archippus F.; (30) Argynnis 
cybele F.; (31) Pamphila cernes B.-L.; on P. manataaqua Scud.; (33) 
P. verna Edw. ; fay Eudamus tityrus F. — all ing. 
i tera— Bombyt ide: (85) Anthrax parvicornis Lw.; Bong sr eae 
atriceps Lw., ab.; (37) Toxophora amphitea Wik.; HEmpide: (38) pis 
clausa Rob. (MS); Tachinide: (39) Jurinia sinaragdina hie (40) Epi- 
grimyia polita Twns. —all s. 
Coleoptera — Scarabeide: (41) Trichius piger F., s. and f. p., freq. 
Blephilia hirsuta Benth. — This species closely resembles 
the preceding, but is less abundant, grows in damp woods, the 
stems being taller, 7 to 10 dm., more branched, the heads 
smaller, about 2 cm. wide and somewhat more widely sepa- 
rated. The flowers are white, the lower lip dotted with pur- 
ple. The latter is expanded horizontally, with broad lateral 
lobes and a narrow median one. The upper lip is narrow and — 
has lost its function asa helm, the anthers and stigma project- 
ing far beyond it. At first the stamens hold the dehiscent 
anthers above the tip of the upper lip. After the pollen is 
discharged, they fall forwards, and the receptive stigma takes 
their place. 
The flowers are often visited by bees which land upon the 
lower lip, suck the nectar in a legitimate way and receive the 
pollen upon their backs; but the exposure of the anthers and 
stigma makes it easy for bees to transfer the pollen by crawl- 
ing over the heads in an indefinite way and sucking the ftowers 
from any side, or even not sucking them at all. “The expos- 
ure of the anthers makes it easy for small bees to collect the 
pollen, and they may do harm by neglecting the flowers in the 
