"12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



N. Y., they were full grown by June 30. Galls were received also 

 from Ann Arbor (Pennington), Mich., and Corinth (Barracks), 

 Iowa. They have also been reported in literature from Missouri and 

 Minnesota. A similar gall occurs on Q. hicolor. 



NEUROTERUS FUGIENS. new species 



Female. — Piceous, legs pale beyond coxae, antenna infuscated 

 except tip of pedicel, scape, and first two segments of flagellum 

 which are pale yellowash-white. Head coriaceous, eyes slightly 

 protuberant, cheeks not enlarged behind eyes, malar space A eye 

 with groove, antenna 13-segmented, lengths as (scape) 9 : 7 : 16 : 8 : 8 : 

 8 : 8 : 7 : 7 : 7 : 6 : 6 : 10, last in some specimens shows trace of subdivi- 

 sion. Mesonotum smooth, polished, a few short hairs on scutellum, 

 no traces of grooves, length to width as 50:32, often collapsed. 

 Mesopleura micro-coriaceous, mesosternum bulging prominently be- 

 low. Tarsal claws fine, simple. Wing subhyaline, pubescent, ciliate, 

 first abscissa of radius scarcely angulate, radial cell five times as 

 long as broad, areolet reaching one-fifth way to basal, second inter- 

 cubitus set at angle of about 68° to basal, cubitus reaching basal 

 Avhich is slightly clouded. Abdomen not as long as head and thorax, 

 higher than long, lengths of tergites as 20 : 12 : 6 : 5 : 6 : 4, ventral 

 spine short, ovipositor short, protruding horizontally. Using width 

 of head as a base the length of mesonotum ratio is 1.2, antenna 2.1, 

 ovipositor 1.2, wing 3.9. Length, 1.3-1.7 mm. Average of 58 speci- 

 mens, 1.45 mm. 



Male. — Color as in female. Antenna 14-segmented, lengths of first 

 four segments as 9 : 8 : 22 : 9, third not excavated, slightlj^ bent. 

 Mesonotum length to width as 55 : 35. Abdomen triangular in side 

 view, almost as long as head and thorax, petiole pale. Using width 

 of head as a base the length of mesonotum ratio is 1.4, antenna 2.6, 

 wing 3.4. Length, 1.6-2.05 mm. Average of 17 specimens, 1.79 mm. 



Types.— Q^t. No. 27183, U.S.N.M. Type female, allotype, 9 male 

 and 29 female i:>aratypes. Paratypes in Field Museum, American 

 Museum, and Stanford. 



Host. — Quercus macrocarpa. 



Gall (fig. 29). — A lens-shaped thickening in the parenchyma of a 

 leaf always adjacent to a vein. Single or more or less confluent in 

 a row. Most conspicuous from the lower side where rose-red hairs 

 show against its translucent white background. On upper surface 

 showing a very slight swelling only and only a slightly lighter green 

 color. Exit hole above where wall is thinnest. Causes wrinkling and 

 deformation of the leaf if numerous. Occurs in spring when young 

 leaves are about one-third grown. 



