— 24— 



wings reaching a little beyond the middle of the abdomen. Described from 

 a single specimen, the only one that I have been able to rear from hundreds 

 of galls that I have collected both in Michigan and Iowa. 



Fig. I. 

 ON RED AND SCARLET OAKS ( Ouerciis rubra and Q. coccinea) 



Dryophanta liberaecellulae n. sp. Gall. — Globular excres- 

 cences on the leaves of the red and scarlet oaks sometimes taking 

 into themselves the entire leaf tissue and at others surrounded by 

 the blade of the leaf as is the case of Amphibolips nubilipennis or 

 Andriciis singularis, either of which it very much resembles, but 

 from which it differs by having a somewhat roughened and fuzzy 

 exterior and a much thicker outer wall, and by having the larval cell 

 perfectly free to roll about within. The galls vary from 6.5 mm. \o 

 9.5 mm. in diameter. See fig. i. 



When gathering the galls on May 20, i88g, it was noticed that 

 some of the flies had already escaped, and on May 28th occasional 

 galls could be found with the flies still in them. I have taken several 

 of these galls in Michigan, but obtained only parasites from them. 



Gall-fly. — Black; feet, first four or five joints of antennae and 

 the palpi light yellow. 



