476 - Trans. Acad. Sci. of St. Louis. 
c. ps, ab.; (6) M. obliqua Say o'9, -8., freq.; (7) M. coloradensis Cr. 
3, 8-5 (8) M- bimaculata Lep. 9, s.; (9) M. dentiventris Sm. oi, s.; (10) _ 
M. aurigenia Cr. <j’, s.; (11) Megachile latimanus Say 9, s. and c. p., freq. ; 
(12) M. sexdentata Rob. (MS) <j’, s.; (13) Epeolus remigatus F. 9, s.; 
Andrenidae: (14) Halictus ligatus Say 9, c. p., ab.; (15) H. pilosus Sm. Q, 
c. p.; (16) Agapostemon viridula F. 9, s.; (17) A. radiatus Say ,j', 8. 
Lepidoptera — Rhopalocera (18) Danais archippus F.; (19) Phyciodes 
tharos Dru.; (20) Pieris protodice B.— L.; (21) Colias philodice Gdt.; (22) 
Papilio <arate L. and glaucus L.; (23) P. ei F.; (24) P. troilus L.-; 
= Pamphila peckius Kby.; (26) P. cernes B.— L.; (27) Budamus bathyllus 
and A.; Heterocera (28) Scepsis fulvicollis ne —all 
Di iptera — Bombylidae: (29) Exoprosopa fascia 5 ikeurs ; (30) Systoechus 
vulgaris Lw., freq.; Conopidae: (31) hatin ‘cba Say —all s. 
KRIGIA AMPLEXICAULIS Nutt. — The plants are often col- 
lected in conspicuous patches. The stems grow from three to 
six decimetres high and bear several yellow heads which 
expand about three centimetres. 
The flowers are all ligulate. The pollen becomes attached 
to the hairy portion of the style and is thus carried upwards 
and exposed. The corolla tubes are narrow and measure 
about two millimetres in length. 
The following visitors were observed on May 30th: — 
Hymenoptera — Apidae: (1) Apis mellifica L. 8, s. and c. p., one; (2) 
Synhalonia speciosa Cr. gj), s.; ; (3) Ceratina dupla Say f'Q, 8-, frea.; (4) 
Alcidamea producta Cr. ¢', s.; (5) Osmia albiventris Cr. 9, s.; (6) Nomada 
annulata Sm. \, s., freq. ; Aidevildag (7) Halictus ligatus Say 9, S. and ©. 
p., ab.; (8) H. tasoratia Nyl. 9, s. and c. p.; (9) H. pilosus Sm. Q, s. and c. 
De; freq. ; (10) H. albipennis Rob. 9, s. and c. p., ab.; (11) H. confusus Sm. 
Q,s. and c, p., freq.; (12) Augochlora sim Rob. 9, s. andc. p., ab.; (18) 
Agapostemon viridula F. 9, s. and c. p.; (14) Prosopis affinis Sm. <j’, S- 
and f, p., freq.; (15) P. pygmaea Cr., L ee Eumenidae: (16-18) Odynerus 
spp., 8., freq. (19) O. foraminatus eater’ s.; (20) O. anormis Say, s., freq; 
Cia citates (21) Crabro interruptus Lep., 
Diptera — Conopidae: (22) Zodion at tess Say, s.; Syrphidae: (23) 
Mesograpta marginata Say; (24) Sphaerophoria cylindrica Say; (25) Eris- 
talis transversus Wd.; (26) Helophilus similis Mcq.; Tachinidae: (27) Cisto- 
gaster occidua WIK.; Muscle: (28) Lucilia cornicina F.—all s. or f. P 
Lepidoptera — Lhapalocwd: (29) Danais archippus F.; (30) Phy clodes 
tharos Dru.; (31) vt aii asterias F.; (82) Pamphila peckiad Kby. —alls. 
Coleoptera — (33) s Co ccinellidae: (34) Megilla maculata De G.; 
Chrysomelidae: (35) Diativtion 12-punctata Oliv., freq. —all f. p. 
