Vol. Xxii] ENTOMOLOGICAL NEWS 197 



Fletcher, T. B. Ent. Mo. Mag., 1909, p. 168. 



He exhibited at meeting of Ent. Soc. Lond. 2 June, 1909, an 

 example of Scarabaeits gangeticus taken on wing, carrying 

 small Borborid flies. 



The habit of certain Borborid flies in attaching to copro- 

 phagous beetles is evidently world wide, and undoubtedly aids 

 them in locating suitable breeding places. The habit of cer- 

 tain Hymenopterous egg-parasites of clinging to parents of the 

 eggs is quite possibly confined to certain groups. The other 

 cases are difficult of classification, and some may be accidental. 



Three new species of Cynipidae (Hym.). 



BY WILLIAM BEUTENMULLER, American Museum of Natural 



History, New York City. 



Dryocosmus favus sp. nov. 



Female. Head black, finely rugoso-punctate, mouth parts dull 

 rufous. Antennae 14-jointed, first joint quite stout, second much 

 shorter, third long, slender at base and broad at end, fourth about 

 one-half as long as the third, fifth shorter than the fourth, sixth to 

 last short and almost uniform in size, deep brown, terminal joints al- 

 most black. Thorax jet black, smooth and shining, very minutely 

 punctate anteriorly and laterally, which parts are slightly hairy. 

 Parapsidal grooves sharply defined, with a few short hairs along the 

 outer edges. Median groove wanting. Anterior parallel lines very 

 short and scarcely evident. Lateral grooves wanting. Pleurae very 

 finely rugose, with a rather large polished area. Scutellum finely 

 rugose, with a lateral ridge which extends around the apex, foveae at 

 base not distinct. Abdomen black, smooth and shining with a few 

 short hairs at the base dorsally. Legs pitchy brown pubescent, 

 coxae black. Wings hyaline, veins pitchy brown. Radial area partly 

 open. Areolet distinct. Cubitus extending to the first cross-vein. 

 Length, 3 to 3.50 mm. 



Gall. In clusters from about fifty to one hundred on the trunks of 

 young red and scarlet oaks (Quercus rubra and coccinea), immediately 

 above the ground, in autumn. Hard and woody (when dry) probably 

 soft when fresh, monothalamous. Oblong, narrower at base than at 

 apex, which is flat. In form they are somewhat like square tubes or 

 five or six-cornered tubes, giving them the appearance of cells of a 

 honeycomb. Hollow inside and rather thin-walled. The fly emerges 



