THE AMERICAN MUSEUM JOURNAL 



spring; brown in winter. This gall is an enlargement of the terminal bud of 

 young shoots of the wild cherry (Priinus scrotina). Common. 



54. Ash Midrib Gall {Cccidomyia pellcx Osten Sacken). — Rounded, oblong 

 or very much elongated, succulent. Under side indicated by being somewhat 

 swollen. Pale green, sometimes tinged with red. Length from i to 2 in. On 

 midrib of leaf of ash {Fraxiniis amcricana). May and June. Rather common. 



55. Honey-locust Pod Gall {Cccidomyia gleditschicB Osten Sacken). — 

 Formed of a single leaflet in such a way as to assume the shape of a small pod. 

 On the leaves of honey-locust {Glcditschia triacanthos). Sometimes nearly 

 all the leaves on the terminal twigs are deformed in this way. Not common. 



56. Hickory Onion Gall {Cecidomyia hoLotricha Osten Sacken). — Sub- 



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