;tJH 



THE CANADIAN ENT<)il<>UK»I8T. 



52 ; Leionotus foratninatui, 53. Ltionotui foraminatui is surpassed 

 in number of visits by 27 species of Ijces. I have observed 6,142 flower 

 visits of 297 species of bees. The average for wasps is 9, and for bees 20. 



Pierce gives a table of 1 7 species of stylopized Andrenidne, of which 

 only three appear to be oligotropic in the sense in which he uses the term. 

 In my table of oligotropes, one of these was stated to visit two other 

 flowers besides PoUmoitium. At least five are oligotropic in the sense 

 used by me. 



The following table contains 17 species of local Andrenidie, eight of 

 which are oligotropic and nine jjolytropic : 



HOST BKES. 



Ol.llK>TROPP-S. 



PtilanUrena cri((cni.'i 



(x>lrim>nii 

 Par.'tndrcn.-i anJrcnxiJv*- 

 AnJrcna ilIin>H-n-is 

 <>.'ilii'taria 



" lUibiL'iila 



Ptcrandrcnn astori-i 



Holidapnia. 



Time ol flit(ht. 



Mar. 36 May 14 

 Anr. 20 .Ma% 20 

 .\Iar. 20 June 5 

 25 Max 24 

 31 Juno >2 

 13 Oit. .» 

 8 Oil. 21 

 13 Oi-t. ii 



Mar. 

 Mar. 

 Aujf. 

 Sipt 

 Auk. 



Vi«itcJ lor pi^Ilcn. 



Clayttmia vir^nica 

 Polrmoniiim roplans 

 Sallx 



C\'inpi»iUi' 



POI-VTROPK-S. 



Opanilrena bipum-tala 



KobcrtM>nii . . . 



AnJn-na i\>rni 



" manjihiilan!! . . . . 



Na»i»nii 



Trai'liantlrena claytonuc. 

 hippotes . . 



nuda 



Chloralictus zcphynw 



•• opamu* 



versatu* 



Mar. 17 June I 

 Mar. 21 June- M 

 May 4 July 7 

 junc•^' 

 Mar. l7-.Mav 22 

 Apr. 2I-Mav31 

 Apr. 10-June 19 

 .Apr. 10-Junc 29 

 Mar. 17- June 16 

 March-Nov. 



(S taniilu-H 



15 •• 

 4 



5 



5 '• 



8 •■ 



4 •• 



5 •• 



Oliuotropkh. 



P<wud. lahr»>silorn)i^ 



InbronUH 



" rudbcckin.* , 



" nolidaifiniM . .. .. 



Aug. 3-Srpl. 25 

 " 1- •• 28 

 ■• 1- •• 12 

 '• 11 -Oct. 4 



CoiT»p«wiil«r 



The facts about the flower visits of stylopized bees are about as 

 follows : Proiopis is essentially polytropic The Andrenidie are partly 

 oligotropic and partly polytropic. Of 44 species which I have observed 



