Jan., '09] ENTOMOLOGICAL NEWS. 7 



C. pini-radiatae lives at the base of the needles of 

 Monterey pine, which become stunted and swollen 

 as a result of its attacks, and pupates within the 

 fascicle. This refers to C. pini-radiatae about Stanford Uni- 

 versity, for in Golden Gate Park, in San Francisco, apparently 

 the same species produces no swelling of the pine needles 

 (which, however, turn yellow), while the pupa of the latter is 

 enclosed in a resinous cocoon which is often fastened exter- 

 nally to the scales at the base of the needles. The fact that 

 the Golden Gate Park C. pini-radiatae neither stunt nor swell 

 the needles was discovered by Snow (n). On the European 

 pines are found several species of midges with habits corre- 

 sponding to those of our North American Cecidomyidae. 

 Much interesting work remains to be done with these insects. 



C. rcsinicoloides was found to be singularly free from para- 

 sites, as but two examples of a chalcid fly (which is evidently 

 the Syntasis diplosidis that preys upon C. resinicola} were ob- 

 tained from the many larvae and pupae reared to maturity. 



BIBLIOGRAPHY, 

 i. ALDRICH, J. M. (1905). Catalogue of N. A. Diptera, 



pp. 151-152, 160. 

 2. COMSTOCK, J. H. (1879). Diplosis resinicola, (Rep. 



Dept. Agric., 1879, p. 256). 

 3. ECKEL, L. S. (1903). The Resin-Gnat Diplosis and 



Three of its Parasites (Ent. News, XVI, pp. 279- 



284). 

 4 _ FELT, E. P. (1903). C. pini-rigidae, (N. Y. State Mus., 



Memoir 8, II, pp. 423-425). 

 5 FELT, E. P. (1903). C. resinicola, (N. Y. State Mus., 



Memoir 8, II, 410-413). 

 6. KERTESZ, C. (1902). Catalogus Diptororum, II, pp. 116- 



117. 

 7. MIK, Jos. (1897). Einiges uber Gallmucken, (Wein. 



Ent. Zeit. XVI. pp. 290-292). 



8. OSTEN SACKEN (1862). On the Habits of the Cecido- 

 myidae (Mon. Dip. N. A., Pt. I, pp. 179-198). 



