Dec, 1915] Zoocecidia on Species of Hicoria 45 



This double-chambered gall cannot be Caryomyia inanis 

 Felt, for it is neither "globose and small. " The author describes 

 elsewhere a specimen which fits that description and is very 

 probably produced by the cecidozoon just mentioned. Absolute 

 certainty, it must be remembered, can only be obtained by 

 checking the reared adult insects with the original descriptions. 



Sears described this gall from Cedar Point, Ohio, under the 

 name C. inanis. 



Sears, Ohio Nat. 15:380, pi. 18, Fig. 18. 1914. 



6. Caryomyia inanis Felt. 



"Globose, thin- walled with a false chamber at the apex. 

 Dia. 2-3 mm." Felt. 



In my material, the false chamber is large, occupying more 

 than half of the gall. The gall is slightly balloon-shape, 23-2 mm. 

 high. Surface perfectly smooth. Collected, Hocking County, 

 Ohio, on H. ovata. 



Sears in his "Insect Galls of Cedar Point (Ohio) and 

 Vicinity," described my number 5 under this species. 



Felt, Jour. Econ. Ent. 4:456. 1911. 



Felt, Bull. Brooklyn Ent. Soc. 8:99. 1913. 



7. Cecidomyia sp. Cecidium nov. 



On leaf, under side, elongate-conic constricted somewhat 

 at base so as to resemble a miniature lamp chimney. Arises 

 from saucer-like base. 5 mm. in length. Smooth, greenish- 

 yellow to brown. Two chambered, the larval chamber at the 

 proximal end, sub-spherical with a dia. about \ the length of 

 the gall. The distal false chamber large, the walls becoming 

 thin apically. The partition separating the chambers is firm 

 with a minute perforation at its center. Surface of leaf opposite 

 gall not raised. 



Collected in Hocking County, Ohio, on H. glabra, July. 



Type specimens unaccountably missing. The description 

 is nevertheless presented inasmuch as both it and the drawing 

 were made from fresh material in the field. 



8. Cecidomyia sp. Cecidium nov. 



On leaf, under side, a gall similar to 7, perhaps a variety of it, 

 though its prominent and constant differences would indicate 

 a distinct species. Conic with rounded base and truncate 

 tip, 4-6 mm. high, 3-4 mm. broad in widest part. The wall at 



