BULLETIN 



OF THE 



BROOKLYN ENTOMOLOGICAL SOCIETY 



Vol. VIII • December, 1913 No. 7 



CONTENTS 



NORTH AMERICAN ACORN GALLS, Wm. Beutenmuller 101 



WORK AND TIMES OF DR. HARRIS, R. P. Dow 106 



A NATURALIST IN BRITISH GUIANA, J. M. Geddes 118 



SCARITES SUBTERRANEUS FABR. AND VARIETIES 



Chas. Schaeffer 122 



PROCEEDINGS OF THE BROOKLYN ENTOMOLOGICAL 



SOCIETY 124 



The North American Acorn Galls with Descriptions of 



New Species 



By William Beutenmuller, New York. 



The following Cynipid galls are known to me to occur on and 

 in the acorns of different kinds of oaks. Other new species 

 will undoubtedly be found when we know more about the nat- 

 ural history of the Cynipidae. The figures on the plate were 

 made by Mrs. E. L. Beutenmuller. 



Amphibolips prunus Walsh, figs. 1, 2. 



Cynips quercus prunus Walsh, Proc. Ent. Soc. Phila., vol. Ill, 1864, p. 

 639; Am. Ent., vol. I, 1869, p. 104, fig. 80. 



This is the well known oak plum gall which grows on the 

 acorn cups of red oak (Q. rubra) , black oak (Q. velutina) , scar- 

 let oak (Q. coccinea), and scrub oak (Q. nana). It is bright 

 red, more or less globular and often looking like a marble. 

 When fresh it is solid but fleshy and of apink color inside, shad- 

 ing into yellow toward the middle, where there is a single large 

 larval chamber. When mature it becomes blood red and when 

 old and dry it becomes shriveled and quite hard. It matures 

 late in August or early September, and the fly emerges the 

 following spring. Additional references to the literature of 

 this species may be found in my paper on North American 

 species of Amphibolips (Bull. Am. Mus. Nat. Hist., vol. XXVI, 

 1909, p. 62. 



Habitat: New England and Middle States south to Ga,,- and west, to 

 Colo. .<;>y.oraan 'ns,/^/,^;>. 



JAN 26 1914 



I 



