^52 NEW YORK STATE MUSEUM 



with a short, stout knob apically. Palpi probably quadriarticulate. 

 Dorsum of thorax shmmg black, slightly hairy, sides of prothorax 

 brown. Scutellum prominent, sparsely setose. Abdomen raspberry 

 color, blackish dorsally. Ovipositor blackish and when extended 

 probably as long as the body, the terminal lobes with a length over 

 twice the width, narrowly rounded apically and sparsely setose. 

 Legs very pale, ochreous tinted. Other characters practically as 

 m the male. 



The male was described from specimens kindly donated by Pro- 

 fessor Cockerell. The structural characteristics of the female were 

 drafted from the types, the color characters being taken from the 

 original description. Type Cecid. a 1920. 



OBOLODIPI.OSIS Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 410-11 



1910 Rubsaamen, E. H. Zdtsch. Wissenschaft. Insektenbiol., 15:276 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:61 

 1913 Kiefifer, J. J. Gen. Insect., fasc. 152, p. 189 



The genus was erected to include a remarkable form which diverges 

 widely from the ordinary type of Cecidomyia in the male genitalia. 

 The terminal clasp segments are greatly produced, being nearly one- 

 half longer than the basal clasp segment. The dorsal plate is greatly 

 expanded, nearly divided, the lobes being orbicular, while the ventral 

 plate appears to be widely separated, the two lobes being short, 

 stout and roundly triangular (pi. 17, fig. 2). The male has the 

 flagellate antennal segments strongly trinodose, the claws are simple 

 and the third vein unites with the margin well beyond the apex. 



Type Cecidomyia robiniae Hald. (C. orbiculata 

 Felt) 



Obolodiplosis lobiniae Hald. 

 1847 Haldeman, S. S. Am. Jour. Agric. & Sci., 6:193-4 (Cecidomyia) 

 1859 Fitch, Asa Noxious & Other Insects, N. Y. 5th Rep't, p. 53-4 



(Cecidomyia) 



1859 N. Y. State Agric. Soc. Trans., 1858, 18:833-34 



(Cecidomyia) 



1859 Haldeman, S. S. Boston Soc. Nat. Hist. Proc, 6:401-2 (Cecidomyia) 

 1862 Harris, T. W. Insects Injurious to Vegetation, p. 567-68 (Cecidomyia) 

 1872 Glover, Townend U. S. Com'r Agric. Rep't, p. 127 (Cecidomyia) 

 1880 Chambers, V. T. Am. Ent., 3:60 (Cecidomyia) 



1 891 Hopkins, A. D. W. Va. Agric. Expt. Sta. Bui. 16, p. 89-90 (Cecidomyia) 



1892 Riley, C. V. & Howard, L. O. Insect Life, 5: 136 (Cecidomyia) 



1904 Washburn, F. L. Minn. Agric. Expt. Sta. Bui. 88, p. 188 (Cecidomyia) 



1905 Minn. Agric. Expt. Sta. Bui. 93, p. 65 (Cecidomyia) 



1906 Felt, E. P. Insects Affecting Park & Woodland Trees, N. Y. State 

 Mus. Mem. 8, 2 : 730 (Cecidomyia) 



