37 
Six females and five males. Illinois. (Coll. Am. Ent. Soc.) Also two 
females (Cornell University), labeled as having been reared from gall of 
Cecidomyia strobiloides. 
18. Pontania atra new species. 
Female. — Length 4 mm.; slender, elongate; clypens nearly truncate ; 
ridges about anterior ocellus rounded or subobsolete; fovea very shal- 
low, indistinct; antennae slender, fourth joint distinctly longer than 
third; sheath slender, tapering, rounded at tip; claws with inner ray 
considerably shorter than outer, not very deeply notched ; stigma narrow, 
elongate. Color shining black, including mouth parts, pronotum, and 
tegula?. Trochanters, apical half of femora, tibia?, and tarsi inclined 
to pallid, but strongly infuscated. Veins, including stigma, very dark 
brown. 
One female. Michigan, April 21. G. C. Davis, collector. (Coll. U. S. 
Nat. Mus.) 
19. Pontania hyalina Norton. 
1864. Messa hyalina Norton. Proc. Ent. Soc. Phila., in, p. 8. 
1867. Messa hyalina Xorton. Trans. Am. Ent. Soc, I, p. 222. (Cat., etc., p. 84.) 
Female. — Length 4 mm.: moderately robust, shining; clypeus very 
shallowly, if at all, excavated, almost truncate; vertex nearly smooth; 
ridges indistinct, rounded; antennal fovea very large and deep, nearly 
circular; antenna? somewhat longer than head and thorax, slender, 
scarcely tapering, third joint very much longer than fourth, third to 
fifth joints nodose at apex; sheath very elongate, narrow, tapering reg- 
ularly to tip, more than half as long as abdomen; claws deeply cleft, 
rays subequal; outer veins of discal cells of hind wings and usually sec- 
ond recurrent and second transverse cubital interstitial; third cubital 
cell quadrate. Color black; tips of clypeus, labrum, mouth parts, extreme 
angles of pronotum, tegulae, legs except extreme bases of coxa 1 , yellow; 
tips of posterior tibia?, their tarsi, and the cerci dusky; upper and lower 
edges of femora sometimes infuscated; veins yellowish brown ; basal 
half of stigma hyaline. 
Gall. — (Frontispiece, fig 2.) Fleshy galls, occurring in two parallel 
rows, one on either side of the midrib, sometimes touching but not origi- 
nating from the latter, and rarely extending to the edge of the leaf; 
sometimes as many as twenty on a single leaf; in other cases confined 
to a row on one side of the leaf, or occasionally occurring singly; shape 
irregular, elongate-ovate, projecting equally on both surfaces of the leaf; 
length 7 to 10 mm., the abortive ones smaller. Color on upper side 
more or less brownish red; beneath white, with slight purplish tinge. 
The galls result from the punctures of the females in the very tenderest 
leaves, the wound closing and becoming invisible. The eggs and larvaa 
are subject to the attacks of mites, Thrips, a curculionid (Anthonomus 
sycophanta Walsh), and a lepidopterous larva which eats out the entire 
interior of the gall, tenthredinid larva and all. 
