Robertson — Flowers and Insects — Labiate. 107 
Pycnanthemum linifolium Ph.—In my neighborhood this 
is the most common species of the genus. The stems are 
shorter than in P. lanceolatum, growing from 4 to 7 dm. 
high. The corolla tubes are a little shorter, about 4 mm. 
long. It was observed in bloom from June 29 to Sept. 12. 
July 19 and 20 I collected the following visitors, all only 
sucking, except No. 12:— 
Hymenoptera — Apidae: (1) Apis mellifica L. $, ab.; (2) Melissodes 
bimaculata Lep. 9’; (3) Ceratina dupla Say 9; (4) Phileremus illinoensis 
Rob. 9; Andrei: (5) Augochlora stidieeante Pttn. O; (6) A. lucidula 
Sm. 9; (7) A. pura Say 9; (8) Halictus pectoralis Sm. 9; (9 ) i. pale 
Lep. er OD H. parallelus Say ¢'9; (11) H. fasciatus Nyl. J 9; (12) 
H. confusus Sm. 9, s. and c. p.; (13) H. pruinosus Rob. <j; (14) Fa 
codes arvensis Pttn. 9; (15) Prosopis affinis Sm. ore (16) P. pygmaea 
je le 
Sauss.; Crabronidae: (19) Crabro interruptus Lep.; Philanthidae: (20) 
Eucerceris zonatus Say; Bembecidae: (21) Monedula ventralis Say; (22) M. 
nineacooe ta F.; Sphecidae: (23) Ammophila intercepta Lep.; (24) A. gracilis 
p-; (25) Patoposts cementarius Dru.; (26) Isodontia philadelpbica Lep. ; 
Priononyx atrata Lep.; (28) P. thomae F.; ae dae: (29) Pompilus 
philadelphicus Lep.; (30) P. eae Say; (81) P. ferrugineus Say; 
ore thew unis sexcincta F.; (33) M. eae Say. 
— Midaside: (3 re ears ‘Sanatae Dea: ; Bombylide: (35) Exopro- 
sopa asta nis ase ai : (36) Empis clausa Rob. (MS); Conopide: 
(37) Conops scan ee eee ; (38) Physocephala texana Will.; (39) 
Zodion fulvifrons Say; (40) Oncomyia loraria Lw.; Syrphide: (41) Chryso- 
gaster nitida Wd.; (42) Mesograpta marginata Say; (43) Sphaerophoria 
cylindrica Say; (44) Eristalis latifrons Lw.; (45) E. transversus Wd.; (46 
E. vinetorum eS (47) Syritta pipiens L.; Tachinide: (48) Cistogaster oc- 
cidua bade ; (49) C. pallasii Twns.; (50) Jurinia arma teanittie Mcq.; (51) 
J. apicife Sic: (52) Acroglossa Rebs Will.; Muscide: (53) 
Lucilia cornicinal vere ader Hes cellaria F. 
Lepidop tebe Teh opalocera: (55) Pieris rapae L.; (56) Colias philodice 
Godt.; (57) Ph Bienes genie D.-H.; (58) Pyrameis huntera F.; (59 
Lycaena eae 
Coleoptera — peter Ps (60) Trichius piger F.; Cerambycide: (61) 
Typocerus ‘thea Newm.; Mordellide: (62) Mordella 8-punctata F.; (63) 
M. pp Melsh. ; Rhi. ere (64) Rhipiphorus flavipennis Lec., in 
cop.; (65) R. limbatus F., 
= a mage mien a (66) Lygaeus turcicus F.; (67) Oncopeltus 
fasciatus Dall. 
Pycnanthemum lanceolatum & linifolium —The following 
is a mixed list of insects taken from the flowers of both species 
and containing insects not mentioned in the lists of either of 
them: — 
