Dec, 1915] Zoocecidia on Species of Hicoria 43 



24. vSmall gall, 2-23''2 mm. high, with flaring base, attached bv minute pedicel at 

 center. (28). 



24. Large gall, 5-6 mm. long, gradually constricted proximally to very narrow 



neck at point of attachment. (29). 



25. Distal face with fovea containing a central nipple. Leaf not projecting on 



side opposite gall. (30). 

 25. Distal face with fovea, leading into central pore; no central nipple. Prominent 



convexity of leaf on side opposite the gall. (31). 

 25. Distal face flaring out at edge into radiate bracts; these sometimes strongly 



incurved. (32). 



ERIOPHYID^. 



1. Eriophyes? sp. Cecidium nov. 



Small galls in the axils of the lateral veins of the leaflets. 

 Above marked by a light colored angular area 1-1^ mm. dia. 

 Below a small mass of tissue (the gall proper) fills the angle, 

 covered by a fine close pubescence. Chamber within of small 

 diameter, irregular in shape. The characteristic mites were 

 definitely observed. They are white in color. On some 

 leaflets every angle made by the mid-vein branching into the 

 lateral ones was occupied by a gall. On FI. cordiformis, in 

 Athens County, Ohio, August. 



Type specimens at Ohio State University. 



2. Eriophyes? sp. 



Leaf edge gall; edge inrolled involving little more than the 

 teeth. Variable in length from .5-2 cm. or longer, 1 mm. -2 mm. 

 thick. Outer surface of affected area finely roughened; color 

 of under side of the leaf. Thompson states that mites live 

 within the fold. His report is the first one on this gall. Species 

 of hickory on which specimens were found not determined. 



Thompson, Illus. Cat. Am. Ins. Galls. 1915. p. 57, pi. 10, Fig. 260. 



ITONIDID^. 



3. Caryomyia nucicola, O. S. 



"Irregular swelling in the husk produced by the reddish 

 larvae. Reference to Caryomyia provisional." Felt. "Con- 

 tain thick walled cells. On Carya (Hicoria) alba." Jarvis. 



Osten Sacken, Trans. Am. Ent. Soc. 3:53. 1870. 



Felt, Jour. Econ. Ent. 4:457. 1911. 



Jarvis, 39th Ann. Rept. Ent. Soc. Ont. 1908. p. 84. 



4. Cecidomyia cynipsea O. S. 



"Rounded, irregular, hard swelling on the under side of the 

 hickory leaf, on the mid-rib near the base of the leaf about 



