104 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



98 : 20 : 9 : 3 : : T, second smooth at base and with slightly pubescent 

 areas on sides, exposed parts of rest microscopically punctate except 

 for a narrow smooth and polished hind margin. Ventral valves 

 directed backward, ventral spine tapering, pubescent underneath, 

 about as long as first segment of hind tarsus. Using width of head 

 as a base the length of mesonotum ratio is 1.4, antenna 2.4, wing 3.6. 

 Length of three specimens, 3.5, 3.7, 3.8 mm. 



Two of the above specimens were reared July 13 and 24, 1914, by 

 W. Middleton from galls on Q. Tnaxima collected at Falls Church, Va. 

 The third was from a gall collected June lo, 1914, by H. E. 

 Schradieck at East Hampton, Long Island, the fly emerging before 

 July 20. He also sent galls from Riverhead, Long Island. The 

 writer has collected galls at Blue Hills, Mass., and also at Wash- 

 ington on Q. velutina. 



AMPHIBOUPS CONFLUENTUS (Harris) 



Galls at Ithaca, N. Y., contained full-grown larvae on July 14, 

 1908, when collected, pupae on August 1 and adults September 12 

 when 80 specimens, all females, were cut out of the galls. A gall 

 at Waterport, N. Y., contained a pupa August 14. Galls at Manistee, 

 Mich., contained adults when opened September 20. At Miller, Ind., 

 galls just turning brown were gathered on June 3, 1911, then con- 

 taining full-groAvn larvae which had transformed into adults by 

 September 16. Flies emerged on November 21, 1918, from galls 

 on Quercus velutina from Lyme, Conn. (Hopkins U. S. No. lOTOT''). 

 Brodie collected galls on Quercus coccinea at Toronto in October 

 and producers emerged November 10, 1892, all females. 



AMPHIBOLIPS SPONGIFICA (Osten Sacken) 



At Washington, which is the type locality for this vernal sexual 

 form, the galls appear Avith the leaves in the spring, having been 

 observed on April 24, 1921, 3 cm. in diameter when the leaves Avere 

 scarcely 15 mm. Avide. In 1923 they were full grown by May 6, 

 but Avitli the nutritive layer only partly used up. One contained a 

 living male ready to emerge on June 16. At Porter, Ind., galls AA-ere 

 beginning to turn brown on June 19, 1912, and a male issued July 1. 

 At Evanston, 111., males and females issued June 16 and 20, 1913. 

 Galls collected June 16, 1918, on Q. coccinea at Lyme, Conn., gave 

 adults of both sexes June 12, 21, 29, 1918 (Hopkins U. S. No. 10767''). 

 Flies emerged from galls from Rosslyn, Va., on June 12-14. Brodie 

 collected galls at Toronto on Quercus maxima. " They appear as an 

 expansion of the leaf early in May, ahvays attached to the end of a 

 A^ein. Ova placed in bud in fall." Adults all out by end of June, 

 1886, and in 1887, he records that the producers had nearly all 

 emerged by July 3, and in 1893 all out by July 1. 



