156 



NEW YORK STATE MUSEUM 



has a whorl of hairs and a subapical whorl of 4 hyaline, hooked 

 appendages. The female is remarkable on account of the absence 

 of wings. The larvae live under the leaf sheath of S c i r p u s 

 silvaticus. It was impossible, from a study of the type kindly 

 placed at my disposal by Professor Kieffer, to add to the above. 

 Type and sole species W. a p t e r a Kieff. 



Joannisia Kieff. 

 1894 Kieffer, J. J. Soc. Ent. Fr. Bui., p. 175 



1896 Mis. Ent., 4:7 



1897 Syn. Cecid. Eur. & Alg., p. 48 



1904 Meunier, F. Soc. Sci. Brux. Ann., 28:9 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 312 



1909 Ent. Soc. Cent. 39th Rep't, p. 44 



191 1 : — N. Y. Ent. Soc. Jour., 19:32 



The antennae have 11 segments in the female and 14 in the 

 male Joannisia, the flagellate segments with a subglobular enlarge- 

 ment ornamented only with irregular whorls of simple setae and a 

 smooth, cylindric stem distally (figure 36). The venation is 



Fig- 36 Joanissia photophila Felt, fifth and tenth antennal seg- 

 ments of male, much enlarged. (Original) 



very characteristic, since the third vein is well separated from 

 costa, runs nearly parallel thereto and unites with the margin at or 

 well beyond the apex ; the fourth vein is simple, the fifth forked. 

 The terminal clasp segment of the male is slender, curving and 

 tapering to an acute apex in all species known to us, except in J . 

 neomexicana. 



One American species, J. pennsylvanica Felt, received 

 through the courtesy of Prof. H. A. Surface, has been reared by 

 Mr B. H. Farr of Reading, Pa., from decaying peony roots. Aside 

 from this, nothing is known concerning the life history of our 

 native forms. Kieffer has reared several European species from 



