INSECT GALLS 



producer passes the winter in the larval form and 

 emerges in June. 



Gnorimoschema gallaesolidaginis, Riley. The 

 hosts are the same as in the preceding species. The 

 producer emerges in August and winters in the imago 

 form. 



Gnorimoschema gallaeasterella, Kellicott, on the 

 golden-rods Solidago latifolia, L., and Solidago caesia 

 var. axillaris, Gray (seldom). Resembles the former 

 species closely in its life history. Both species of 

 this genus are originated on the lower half of the 

 stem of the host. 



Stagmatophora ceanothiella, Cosens. Host Cea- 

 nothus americanus, L. Usually found terminal on 

 the stem of New Jersey Tea, in which case the flower 

 cluster is aborted. The producer passes the winter 

 in the larval state and emerges in June. 



Order DIPTEBA. 



Cecidomyia bulla, Walsh, on the sunflowers Heli- 

 anthus decapetalus, L., and Helianthus divaricatus, 

 L. Occur usually on the stem of the hosts as small 

 flask-shaped swellings. 



Cecidomyia balsamicola, Lintner. Host Abies 

 balsamea (L.), Mill. Consist of a slight enlarge- 

 ment of the needles of the balsam produced by a 

 folding of these organs. 



Cecidomyia impatientis, O.S. Host Impatiens 

 biflora, Walt. A spherical, polythalamous gall at- 

 tached to the host plant by a tapering stalk. 

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