152 NEW YORK STATE MUSEUM 
with a short, stout knob apically. Palpi probably quadriarticulate. 
Dorsum of thorax shining 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 
in 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. argzo. 
OBOLODIPLOSIS Felt 
1908 Felt, E.P. N. Y. State Mus. Bul. 124, p. 410-11 
1910 Rubsaamen, E. H. Zeitsch. Wissenschaft. Insektenbiol., 15:276 
19it Felt, E.P. N.Y. Ent. Soc. Jour., 19:61 
1913 Kieffer, 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 (pl. 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 fobiniae Hald. (CY ombrcuwiladia 
Felt) 
Obolodiplosis robiniae 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) >= 
(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) 
1891 Hopkins, A.D. W. Va. Agric. Expt. Sta. Bul. 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. Bul. 88, p. 188 (Cecidomyia) 
1905 — Minn. Agric. Expt. Sta. Bul. 93, p. 65 (Cecidomyia) 
1906 Felt, E. P. Insects Affecting Park & Woodland Trees, N. Y. State 
Mus. Mem. 8, 2:730 (Cecidomyia) 

Newey. ; State, Agricia Soc) Dranst, (sss 508: Ssaeee 

