April, 1914.] Unreported Cecidia from Connecticut. 291 



Carya ovata. Leaf Gall. 



A bright red, sub-globular, monothalamous, fleshy gall on the 

 under side of the leaflet. At flrst white, later red (July 16) 3 mm. 

 high, 5 mm. broad. A slight papilla terminates the apex. Wall 

 of larval chamber white, rest of tissue reddened. Larva white. 

 Fig. 5. 



Castanea dentata. Leaf Gall. Gall maker, an undetermined aphid. 

 A marked wrinkling and crumpling of the leaf particularly in 

 the region of the mid-vein. No definite cavities formed. Aphids 

 numerous, scattered in the folds of the distorted intervenal tissue. 

 Not common. Fig. 6. 



Castanea dentata. Leaf Gall. Gall maker, Eriophyes sp. 



This gall consists of a yellowish erineum developed between 

 the secondary veins of the leaf, chiefly on the upper side. Ex- 

 hibits a shallow concavity above. 



Clematis virginiana. Bud gall. Gall maker, Eriophyes sp. 



A gall of the terminal leaf bud made up of the greatly hyper- 

 trophied and rigid leaf petioles. These assume the fonn of ir- 

 regular flattened scales. On each of the outermost ones the three 

 minutes leaflets can be readily seen borne on the summit of the 

 highly expanded petiole. The sub-spherical galled bud measures 

 about 1 cm. in dia. The irregular cavities within are nearly 

 filled by the dense growth of filamentous trichomes. This white 

 pubescence chokes up the entrance way between the outermost 

 scales. 



This gall often develops irregularly and the enlarged semi- 

 woody petioles are so compactly pressed together, that its essen- 

 tial morphology might be missed in a hasty examination. Fig. 7. 



Evidently the same gall as one produced on C. Flammula and 

 described by Frank, A. B. (30). 



Decodon verticillatus. Bud Gall. Gall maker, a cecidomyid insect. 

 A gall formed by the thickening of the two or three uppermost 

 minute bud leaves of the terminal or lateral buds. Galled bud 

 3-5 mm. long. Green. The two or three modified leaves neatly 

 overlap fonning a well protected chamber within, which contains 

 a single salmon colored larva. Rather common. Fig. 8. 



Dulichium arundinaceum. Stem Gall. (Rachilla.) Gall maker, 

 a cecidoinyid insect. 

 A monothalamous, open, "groove" gall of the rachilla. One 

 or generally two internodes involved. The normal rachilla is 

 grooved both sides and the gall chamber is an enlargement of the 

 deeper one whose edges are the membranaceous, decurrent bract 

 base. The galled rachilla is so prominently hypertrophied that 

 the affected spikelets can be picked out at a glance due to their 

 greater width. 



