212 



INJURIOUS INSECTS AND FUNGI. 



[Dec. 1894^. 



Celery Stem ¥\y. — 1, la' Larva, natural size and magnified. 16. Larva in celery 

 stem. 2. Fly magnified (after Westwood). 2a. Lines showing natural size of fiy. 



the tissues rotting away, and the little red line showing the pro- 

 gress of the maggot appeared below the decay. The outer green, 

 or partially- bleached, stems were attacked evidently first, then 

 the inner perfectly-bleached short innermost stems were entered 

 just below the little yellow leaves, and tunnelled in the same 

 way. The crown of the root also showed marks of occupancy, 

 and below this there was also in some cases decay of the tissue. 

 A larva was found in many of these passages at various dis- 

 tances from the top of the stem. Usually, only one larva was 

 found in a passage ; now and then there w^ere two or more in a 

 stem., but in ditterent parts of it. Mur'h of the celery thus 



