Indiana University Studies 



as West Ossipee, New Hampshire. The gaU figured by Steb- 

 bins (1910, Springfield Mus. Bull. II, p. 26, fig. 48), may be- 

 long to this undescribed form. 



Andricus ovatus (Weld) 



FEMALE. — A mostly uniform shade of rufous; mesothoracic 

 grooves and lines not wholly straight; second abdominal segment small; 

 length averaging 4.0 mm. HEAD: Slightly broader than the thorax, 

 distinctly enlarged behind the eyes; rufous or darker, the mouth parts 

 still darker; very irregularly roughened, rugose and hairy on the face 

 and cheeks. Antennae short, rather thick; with 14 segments, second seg- 

 ment distinctly elongate, the third not much longer than the fourth, the 

 last rather longer than the preceding. THORAX: Rufous or darker; 

 mesonotum shagreened, very irregularly roughened antero-laterally ; 

 parapsidal grooves distinct but not deep, continuous to the pronotum, very 

 narrow and somewhat obscured by the sculpturing anteriorly, almost 

 smooth at bottom, gradually converging posteriorly, sharply diverging 

 at the very anterior end; median groove distinct for two-thirds or more 

 of the distance to the pronotum, widest posteriorly, shallow, not wholly 

 straight, not quite smooth at bottom; anterior parallel lines shallow 

 grooves, distinct, not wholly straight; lateral lines shallow grooves, 

 smoother, long, not straight; scutellum longer than wide, somewhat 

 squared posteriorly, slightly depressed medio-posteriorly ; rugose, hairy, 

 with the two large, broad foveje broader laterally, smooth, slightly 

 ridged at bottom; pronotum laterally rugose; mesopleurae smoothest be- 

 neath the tegulae, elsewhere very closely rugoso-aciculate. ABDOMEN: 

 Rufous or darker, smooth, microscopically punctate except on the base 

 of the second segment, naked except for a very few hairs latero-basally; 

 not much longer than high, not produced dorsally, the edges of the seg- 

 ments only slightly oblique but well rounded ventrally, the second seg- 

 ment covering about half the abdomen; ventral spine rather short, 

 rather slender and pointed. LEGS: Irregularly roughened, hairy; the 

 tarsal claws rather weak, simple. WINGS : Mostly clear, tinged brown- 

 ish in part, especially in the radial, discoideal, and cubital cells; not 

 ciliate on any of the margins except on the hind margins of the hind 

 wings; veins brown, only the subcosta and cross veins heavy; areolet 

 of moderate size or small; cubitus discontinuous; radial cell rather 

 long and broad, open, the second abscissa of the radius clearly curved; 

 the first abscissa angulate, not sharply so, without a projection, very 

 limitedly infuscated. LENGTH : 2.8-4.8 mm., averaging nearer 4.0 mm. 



GALL. — Elliptical, hollow, standing out from the bark of roots. 

 Monothalamous, altho several galls may more or less solidly fuse. 

 Each gall globoid to ovoid or egg-shaped, up to 4. mm. in diameter by 

 6. mm. long, usually smaller, covered with bark mostly of normal color 

 and texture, somewhat smoother; a direct continuation of the root bark, 

 altho the galls stand out distinctly from the bark; a large, circular 

 exit hole tei-minally. Internally entirely hollow (in mature galls), the 

 walls moderately thin, a distinct woody lining inside of the bark wall. 



