56 PROTECTION OF PLANTS — 1922-23 



perhaps better able to judge the truth of this than myself but I see no reason 

 why efforts should not be made to bring into being an industry which would 

 prove of great value to Canada where the soil and climatic factors in the 

 majority of cases are essentially satisfactory. 



The following list of representative Diptera is presented to record the 

 types commonly met with. 



Syrphidae. 



Sphaerophoria cylindrica Say. off carrot, beet, parsnip, onion, Kelowna, 

 Walhachin, Keremeos and Victoria, B. C. 



Syritta pipiens Linn, off carrot, beet, onion, parsnip, Kelowna, Walhachin 

 Summerland and Victoria, B. C. 



Syrphus ribesii Linn, off carrot, beet, onion, Kelowna, Keremeos, Walha- 

 chin, and Victoria, B. C. 



Syrphus (Lasiopthicus) pyrastri Linn, off carrot, onion, beet, Kelowna, 

 Walhachin and Victoria B. C. 



Syrphus americanus Wied, off beet, Victoria, B. C. 



Syrphus opinator O. S. off mangel, beet, Victoria, B. C. 



Helophilus chrysostoynas Wied. ..off beet, Kelowna. B. C. 



Helophilus latifrons Lw. off beet, Kelowna, B. C. 



Eupeodes volucris O. S. off carrot, Walhachin, Victoiia, B. C. 



Tropidia quadrata Say off carrot, Kelowna, B. C. 



Eristalis arbustorum Osborn off carrot, Walhachin B. C. 



Eristalis occidentalis Will, off beet, Victoria, B. C. 



Eristalis meigeni Wied. off carrot, onion, Kelowna, Walhachin, B. C. 



Eristalis inornatus Lw. off carrot, parsnip, Kelowan, Victoria, B. C. 



Eristalis tenax Linn, off carrot, parsnip, beet, Victoria, B. C, Walhachin, 

 B. C. 



Para^us bicolor Fabr. off carrot Walhachin, B C 



Pipiza pisticoides Will, off carrot, Walhachin, B. C. 



Merodon equestris Fabr, off beet, Victoria, B.C. 



