1931] Fox — A Neiv Form of Vanessa 45 



veins. Infrequent; Fa;\^ettevi]le, Ark. Types in collection of 

 writer. 



This curious, primitive gall is evidently formed as follows: 

 The laiTEe get into the apical region of the developing stem whera 

 they are able to interfere with the normal growth of two very young 

 but definitely formed leaves; the embryonic leaves associated with 

 the apical growing point are suppressed and may be observed in 

 the gall as a compact mass of tissue filling the space between the 

 })etioles of the leaves involved in the gall proper. 



One or two empty pupa cases of the web type were found in the 

 galls. 



Tilia. 

 Cecidozoon undetermined. Cecidium nov. 



30. On Tilia americana L., leaf; kataplasma; highly irregular 

 wrinkle and distortion of leaf brought about through inhibition 

 of growth of intervenal tissue; the veins become greatly looped 

 and twisted; not common, Cedar Point, 0. Types in the collec- 

 tion of writer. 



Within the folds of the distorted leaves were found numerous 

 small white larvae which apparently were the cause of the galled 

 condition; no evidence whatever of the ])revious presence of aphids 

 was found. 



A NEW ABEEEANT FOEM OF VANESSA VIRGINIENSIS 



DEUEY (HUXTEEA FABE.). 



By Chas. L. Fox. 



The museum of the California Academy of Sciences contains an 

 apparently undescribed variety of Vanessa virginiensis, which Mr. 

 E. P. Van Duzee, the curator, has turned over to the writer for 

 description. 



Vanessa virginiensis var. ahwashtee var. nov. 



Upper side. Expanse 43 mm. Primaries : Colors as in typical 

 specimens; fulvous, costal margin, apex and broad outer margin 



