92 NEW YORK STATE MUSEUM 



Arthrocnodax occidentalis Felt 



1912 Felt, E. P. Econ. Ent. Jour., 5:402 



1912 Quayle, H. J. Cal. Agr. Expt. Sta. Bui. 234, p. 514-15 



1913 Econ. Ent. Jour., 6:87 



1914 Ewing, H. E. Ore. Agr. Expt. Sta. Bui. 121, p. 58 

 1914 Felt, E. P. Econ, Ent. Jour., 7:458 



This midge was reared by Prof. H. J. Quayle from larvae preying 

 on red spider, Tetranychus, Berkeley, Cal. It is considered one of 

 the most important natural enemies of T. telarius on the 

 Pacific coast. 



PRODIPLOSIS Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 403 



1910 Rubsaamen, E. H. Zeitsch. Wissenschaft. Insektenbiol., 15:289 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:56 

 1913 Kieffer, J. J. Gen. Insect., fasc. 152, p. 249 



This genus was erected for certain small forms which show 

 an interesting transition between the typical binodose antennae 

 of the male Itonid and the cylindric stemmed antennae of Rhop- 

 alomyia. The circumfila are rudimentary or wanting. The third 

 to ninth segments are distinctly binodose, the eighth and ninth only 

 slightly so, while the tenth to the fourteenth are cylindric. The 

 claws are simple. The third vein unites with the wing margin well 

 beyond the apex. The genitaHa are peculiar on account of the 

 somewhat inflated harpes. Type Cecidomyia floricola 

 Felt, C. ai68i. 



Prodiplosis floricola Felt 

 1907 Felt, E. P. New Species of Cecidomyiidae II, p. 21 (Cecidomyia) 



1908 N. Y. State Mus. Bui. 124, p. 302, 403 



1918 N. Y. State Mus. Bui. 200, p. 129, 133 



The pale yellowish male described below was reared August 15, 

 1907 from somewhat' enlarged, reddened flowers of the meadow 

 sweet, Spiraea salicifolia, taken at Albany, N. Y. 

 Apparently the same form was obtained from enlarged blossoms of 

 Virgins bower. Clematis virginiana, taken at Karner, 

 N. Y., August IS, 1907. 



Gall. The enlarged flower buds in spiraea are reddish. As the 

 season advances, infested blossoms become conspicuous because of 

 their failing to open. 



Male. Length i mm. Antennae one-fourth longer than the body, 

 sparsely haired, pale straw; fourteen segments, the fifth (fig. 7a) 

 with stems one and two times their diameters respectively; basal 

 enlargement subglobose, a subbasal whorl of rather long, curved 

 setae, the distal enlargement broadly oval, a few scattering whorls ' 



