184 



informed me that it did not appear to be verj' successful ; but when 

 I visited the bog, the span worms were nearl}' grown and the appli- 

 cation was made later, probably too late to give good results. 



Mr. Gaboon had applied Pans green to his bog nearly a week 

 earlier, and when I visited it two days after the application was 

 made, I was able to find but three or four living span worms on the 

 bog, showing that the insecticide had proved effectual. 



The Tip Worm. Male imago. 



Antennal structure of female shown at left; a. ovipositor of female. 



Greatly enlarged. 

 (After Smitti.) 



The lip worm [Cecidomyia vaccinii Smith) fig. 1, greatly en- 

 larged, is comparatively common on the Cape bogs, and some people 

 think they do much harm ; but this is very doubtful, for if the tip 

 worm destroys the terminal hud, lateral buds will develop into shoots 

 the next year, and will give a crop of fruit. See fig. 2. 



