160 NEW: YORK STATE MUSEUM 
characteristics. There is a difference in habit as well as color in the 
European Itonida pini DeG. All stages have been described 
by the writer (see the above citation). 


4 
ie 
(ERE 
Fig. 31 Retinodiplosis inopis, 
distal three antennal segments of 
female (enlarged, original) 
Retinodiplosis resinicoloides Wlms. 
1909 Williams, F. X. Ent. News, 20:1-8 (Cecidomyia) 
1910 ————— Ent. Soc. Am. Ann., 3:45-56 (Cecidomyia) 
1gtt Felt, E.P. Econ. Ent. Jour., 4: 465 (Itonida) 
1918 ——— N. Y. State Mus. Bul. 200, p. 16 
This species, evidently closely allied to Retinodiplosis 
resinicola O.S., occurs in California in the resinous exudations 
of the Monterey pine, Pinus radiata. 
The midges, according to the observations of Mr Williams, were 
abroad in March, adults being plentiful in April. The soft, oblong 
