30 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.61. 



GcHl. — This fimbriate-cup gall on hicolor was well described by 

 Riley in 1877 along with a similar one but protruding farther, from 

 a smooth cup on Q. prinoides. Both have often been referred to in 

 literature frequently under the names glandulus and glandulosus. 



The fly described as Andricus glandulus Beutenmueller, of which 

 the author has a cotype, and associated with the above gall is a red 

 species from an unlmown gall. It belongs to the genus Callirhytu 

 and is closely related to C . operatola — the agamic generation of C . 

 operator (Osten Sacken). 



Habitat. — The type material was collected at Wilmette, Illinois, 

 September 1, 1917, when the galls were dropping to the ground. 

 "VVlien some of the galls were cut open just a year later about half 

 still contained larvae and half pupae and adults. One fly emerged 

 in cage March 25 and one April 18, 1919. On December 2, 1919, five 

 living flies were cut out. Transformation thus occurs in fall and 

 emergence in the spring and the emergence is distributed over two 

 seasons. As the emergence is before flowering there must be an alter- 

 nating generation in a vernal gall. In 1908 the galls had nearly fin- 

 ished dropping by September 9 and in 1912 they had all dropped by 

 September 10. They have been seen also at Evanston, Kenilworth, 

 and Glencoe, Illinois, and at Porter, Indiana. The herbarium at 

 Shaw Botanical Garden, St. Ix)uis, has a specimen from Kimmswich, 

 Missouri, collected in 1860. 



The writer has field notes on a similar gall on nine other white oaks 

 of the eastern United States where the recess in which the gall rests 

 is not fimbriate and the gall protrudes half its length or more. See 

 plate 3, figure 12, on pnnus and figure 13 on macrocarpa. As he has 

 not been able to rear any of these as yet it is not knoAvn whether any 

 or all of these are caused by the above-described species or which if 

 any is glandulus Beutenmueller. 



