46 
[April 
Description of the species. 
Rhodites diclilocerus Harris. 
Syn. Cynips dichlocerus Harris, Ins. of Mass. 3d edit. p. 549. 
% 0.1 long, black, base of abdomen red. 
9 0.14 long, brownish red, antennse black, except the three basal joints. 
% Head black, dark reddish behind, sometimes also with a reddish spot on 
the inside of the eyej mandibles (except tip) and labrum red; two basal joints 
of the antennse often reddish-brown. Thorax black, subopaque, pubescent, 
punctate and rugose, parapsidal grooves well marked, intermediate grooves 
flat, with a shining bottom; often a reddish spot on the pleurse, immediately 
over the anterior coxse , sometimes one on the scutellum; abdomen black, yel¬ 
lowish-red at base; this red has more extent on its sides (where it sometimes 
reaches the third segment), than on its back; feet red; coxse red with .black 
base, sometimes black with reddish tip; tip of tarsi black; wings hyaline; the 
second transverse vein curved or angular; areolet either of moderate size, or 
very small, or altogether wanting, its sides coalescing into one stout vein (this 
is quite often the case with this species). 
9 Head brownish red, cheeks generally more brownish; antennse : three 
basal joints, except the very tip of the third, red; the remainder black; thorax 
brownish red, sculpture as in the ^ ; abdomen brownish red; pointed tip of the 
lower half of the last segment, brown; wings pale brownish ; radial area and 
surr(>undings clouded with pale brown; areolet extant; second transverse 
vein angular. 
Numerous % aud 9 specimens; the latter more common. Mr. Har¬ 
ris does not notice the difference in color of the % and the 9 1 he only 
mentions a darker variety, which may be the % . Some of the % spe¬ 
cimens are much smaller than the others, and with much less red at 
the base of the abdomen. 
The gall is described above (No. 2). 
Rhodites radicum n. sp. ' 
% 0.13 long; coxse black. 
9 0.15 long; coxse dark reddish, their base black. 
Head and antennse black ; two basal joints of the latter sometimes reddish- 
brown; mandibles reddish; thorax black, somewhat shining, densely, but very 
finely and uniformly sculptured, so as to give its surface a silky appearance ; 
parapsidal grooves broader and deeper than in the other species, running down to 
the humeri; intermediate grooves short, but well marked ; pubescence of the 
thorax above seattered and hardly apparent, except on a side-view; pleurse 
with two smooth and shining oblong spaces; humeri very rugose, seutellum 
likewise; abdomen black, shining, sometimes brown; borders of segments 
sometimes paler ; feet dark red, two hind pairs of femora infuscated, especially 
at base; tips of tarsi brown; wings : radial and apical arese and a portion of 
the cubital clouded with brown; areolet rather small; its angle, directed to¬ 
wards the base of the wing, is for the most time pale, subobsolete; the portion 
of the cubital between the first transverse vein and the areolet is often subob- 
