AHT. 18. NOTES ON CYNIPID WASPS WELD. 25 



galls in the United States National Museum bear the same U.S.D.A. 

 number as the flies, 2668, and are from Port Grant, Arizona. They 

 are very characteristic, and the writer has taken them many times. 



Host. — Quercus emoryi and Quer&us hypoleuca. 



Gall. — Globular, 25-40 mm. in diameter; green, turning to a tan 

 later; smooth or with a finely coriaceous surface. Interior of a dense 

 cellular structure lighter in color than surface, but darker toward the 

 iionseparable larval cell in center. From the attachment a number of 

 whitish strands run up through the cellular tissue to the larval cell. 

 Attached singy to side of small twigs, not a flower gall. 



Habitat. — The writer has collected these galls at Prescott, Oracle, 

 Nogales, Patagonia, Huachuca Mountains in Ramsey Canyon, and in 

 the Mule Pass Mountains near Bisbee, Arizona. At Hanover Junc- 

 tion, New Mexico, on July 10, 1918, emoryi trees were seen bearing 

 hundreds of these galls and looking like apple trees full of fruit. 

 Some were full grown and still green, while others showed all stages 

 in the process of turning from green to tan, and these contained early 

 and late pupal stages or adults and a few had already begun to 

 emerge. Some of the last season's old and weather galls still hung 

 on the trees. The museum has galls from Chiracahua Mountains also. 



The gall of Amphiholips pahiierl Bassett is of the same type but 

 larger, being 65 mm. in diameter and from an unknown Mexican oak. 

 The flies of palmeri and trizonata diifer from all the other species of 

 A mpliihoUps in having transversely banded wings. Mr. S. A. Rohwer 

 has been kind enough to take a type of trizonata to Philadelphia and 

 compare it with the type of palmeri for me. The two species may be 

 separated as follows : In palmen the apical and stigmatic clouds of 

 wing are confluent on hind margin and first cubital cell is dusky, 

 second tergite closely punctured, scutellum more coarsely sculptured 

 than mesoscutum, antennae 13-segmented, the apical much shorter 

 than 11 plus 12; in ti'izouata the apical and stigmatic clouds are sepa- 

 rate and distinct, first cubital cell not clouded, second tergite only 

 sparsely punctured, little difference in sculpture of mesoscutum and 

 scutellum, antennae 12-jointed, apical longer than two preceding. 



BASSETTIA CEROPTEROIDES (Bassett). 



CalUrhijtis ccropteroidrs Bassett, Trans. Anier. Ent. Soc, vol. 26, 1900, 

 p. 324. 



The types of this species have a massive head much broader than 

 the thorax; no malar groove; segment 3 of antenna longer than 4 

 in ratio of 13:10; mesoscutum coai-sely coriaceous; parapsidal 

 grooves obliterated in front ; pits of scutellum small ; fore wing not 

 ciliate on margin; only subcosta and the two cross-veins visible; 

 woolly ring at base of second tergite ; ventral spine at least five times 

 as long as broad. The species belongs in Bassettia. 



