22 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.61. 



is related to those species of the genus which are bred from flower 

 galls and from stone galls in acorns. 



CALURHYTIS MODESTA (Osten Sacken). 



Cynips modesta Osten Sacken, Proc. Eut. Soc. Pbila., vol. 1, 3861, pp. G5-6. 

 Cynips papula Bassett, Canad. Ent., vol. 13, 1881, p. 107. 



C. niodesta was described from three females from an irregular 

 hard protuberance on both sides of leaf of red oak, the flies emerging 

 in late June at Washington, District of Columbia. In the Museum of 

 Comparative Zoology the type flies are gone from the pins, and the 

 type gall looks like a fragment of the gall of papula Bassett, whose 

 types the writer has seen at Philadelphia. 



C. papula was described from a few females from a similar gall on 

 red and black oak, the flies beginning to emerge July 12 in Con- 

 necticut. The only material of the adults of papula available for 

 comparative study has been a fly reared by the writer from the 

 characteristic gall on the leaves of red oak at Medina, New York 

 (the gall contained pupae on July 2), and flies determined by Gillette 

 from Iowa. The writer has seen the old galls at Rossl.yn, Virginia, 

 and at Hugo, Oklahoma, and taken the fresh galls many times in the 

 Chicago area, where they were very common in 1917 and contained 

 pupae on July 16. Thus the structure of the gall, the host oak, and 

 the known facts of the biology correspond closely, for one would 

 expect the flies to emerge two weeks earlier at Washington, and it 

 seems propable that modesta and papula are but two names for one 

 species. 



If the material studied has been correctly determined, as seems 

 probable, the species has nonciliate fore wings, claws simple, second 

 tergite not tongue-shaped, and a very long ovipositor over 12 times 

 the width of head. It is closely related to the flies reared from flower 

 and acorn stone galls in the genus CalUrhytis. 



CALLIRHYTIS MYRTIFOLIAE (Beutenmueller). 



AndJrious myrtifoliae Beutenmuellek, Oauad. Ent., vol. 49, 1917, p. 346. 



This species has tarsal claws simple and belongs in the genus 

 CalUrhytis along with most species reared from flower galls. Using 

 a cotype female for balsam mount, the length of mesonotum ratio is 

 1.22; antenna, 2.27; ovispositor, 1.9; wing, 3.25. It is one of a 

 group of species with the ovispositor very short as compared with 

 those species of flower gall flies known to ovisposit in acorns. 



CALLIRHYTIS OBTUSILOBAE (Bassett), 



Andricus obtvsilohae Bassett, Trans. Amer. Eut. Soc, vol. 26, 1900, p. 316. 

 Described from two females from an unknown gall. The type fly 

 in Philadelphia is a CalUrhytis, with nonciliate fore wings and pale 

 venation, and is related to those species bred from flower galls. 



