iSgi] Notes on Technique, 71 



rarely on other parts of their tongue. The insects in the list 

 are marked m. 1. or t. according as the pollen masses were 

 found on the maxillary or labial palpi, or on the ligula proper. 

 Visitors: (June 21, 25) Hymenoptera — . \pida: (1) Apis 

 mellifka L. S, 1. ; (2) Coelioxys 8-dentata Say 5?; (3) Stelis 

 lateralis Cr. $; (4) Nomada articulata Sm. S, m. I.; (5) N. 

 incerta Cr. $, m. 1. ; Andrenidce: (6) Macropis steironema- 

 Rob. (MS) 6?; (7) Agapostemon radiatus Say $, m. ; (8) 

 Augochlora lucidula Sm. 5; (9) Halictus fasciatus Nyl. $; (10) 



H. connexus Cr. 3$; (11) Colletes sp. 6, m. ; (12) Prosopis 

 affinis Sm. ?; Eumenida: (13) Odynerus foraminatus Sauss. 

 t. ; Bembecida: (14) Monedula ventralis Say; Larridee: (15) 

 Astata bicolor Say; Sphccidic: (16) Ammophila vulgaris Cr. ; 

 (17) Isodontia philadelphica St. Farg., t. ; (18) Priononyx 



thoma: F. ; (19) P. atrata St. F*arg. 



Diptera — Mycctopkilidce : (20) Sciara sp. ; Bombylidte: (21) 

 Anthrax alternata Say; Syrphidce: (22) Allograpta obliqua 

 Say; (23) Sphaerophoria cylindrica Say; (24) Tropidia 

 mamillata L\v. ; (25) T. quadrata Say; Empidie : (26) Empis 



sp. ; Tachinidce: (27) Cistogaster divisa Lw. ; (28) Ocyptera 

 sp. ; (29) Jurinia apicifera Walk. ; (30) Micropalpus sp. ; (31) 

 Acroglossa hesperidarum Will.; Sarcopkagida : (32) Sar- 

 cophaga sp. ; Muscida: (33) Lucilia caesar L. ; (84) L 

 macellaria F. ; Anthomyida: (35) Anthomyia sp. ; (36) 

 Limnophora sp. 



Lepidoptera — Rhopalocera: (37) Argynnis cybele F. ; (38) 



Thecla calanus Htibn. 



Coleoptera — Scarabacidac : (39) Trichius piger F. 



Hemiptera — Cap si dag: (40) Lygus pratensisL. ; Lygandae: 

 (41) Lygaeus turcicus F., s. 

 Carlinville. III. 



Notes 011 technique. II. 



JAMES ELLIS HUMPHREY. 



In the study of zoospores, especially those of Fungi, it is not al- 

 ways easy to demonstrate clearly the number and attachment 

 of the cilia. The iodine preparations usually recommended 

 for that purpose have not proved satisfactory with me on ac- 

 count of their tendency to shrivel and distort the body of the 



