138 W. H. ASHMEAD. 



11. ISioi'liiza mellea n. sp. 



G((//.s. — Small, brownish yellow, globular galls, occurring separately or in clus- 

 ters of three or more together, on the upper surface of the leaf, attached by a 

 slender point and easily detached Externally they are covered with minute 

 warty, pubescent dots; internally they are fleshy, but when fully matured are 

 of a more or less cellular consistency and shrivel in drying. Diameter .10 to .15 

 inch. They fall to the ground and mature in the sand and fallen debris. 



Gall-fly. — 9 . Length .07 inch. Color uniform dark honey yellow, eyes brown 

 Head finely punctate; thorax smooth, polished, parapsidal grooves distinct; scu- 

 tellum rugose; wings rudimentary; abdomen large, longer than head and thorax 

 combined, compressed and vertically as broad as long. 



Described from eight specimens reared in February. Occurs on 

 Q. parvifolia. 



12. CallirliytJ!!) parviroliio n. sp. 



Gall. — A small rounded gall on the midvein of a leaf, half projecting above and 

 half below the surface of the leaf, and usually but not always, the portion above 

 the upper surface, is deeply indentated. It is polythalamous and contains sev- 

 eral larval cells all radiating from the centre. Diameter .12 to .15 inch. 



Gall-fly.— 9. Length .06 inch. Color: head, thorax and abdomen black, an- 

 tennae and legs brownish yellow. Head and thorax microscopically punctate, 

 only apparent with a high power lens, shining; antennse 13-jointed, short, reach- 

 ing only to base of scutellum ; thorax with two delicately defined parapsidal 

 grooves and the usual two short anterior median grooves faintly traceable : scu- 

 tellum large, fovese distinct, contiguous; abdomen a little longer than thorax, 

 compressed, polished, the second segment occupies not more than half its whole 

 length, all the other segments visible, gradually subequal ; sheaths short not pu- 

 bescent at tip ; wings hyaline, finely pubescent, veins pale, excepting basal vein 

 and the submarginal from its junction with the basal; areolet distinct, cubital 

 cell half closed. 



Described from two specimens. This gall is not rare on Q. parvi- 

 folia, but all the flies reared, except the two above, were guest-flies. 



GalU on the Swamp Chestnut Oak (Quercus prinus). 

 This oak grows to an immense height in our swamp-hammocks 

 and from it I have taken several interesting galls identical with some 

 found north on the white oak ( Querciis alba). 



13. Callirhytis seminator Harris. 



Cynips seminator Harris, Ins. Inj. Veg. p. 548. Fitch, 2d Kep. p. 315. 



This species, before only recorded as occurring on the white oak 

 { Q%iercm alba), is not unconnnon here, both on QtiercHs prinus and 

 on the swamp white oak Quercus bicolor. 



Callirhytis operator O. S., occurring on tlie black-jack ( Q. nigra) 

 may be a phytophagic variety of this well known species ; the galls 

 are similar, but the flies are certainly distinct. I have both species 

 in my collection. 



