Dec. 1897.] 
Dyar: New Sawflies, and Larvae. 
197 
brown trilobate patch on the clypeus, eye black; width .6 mm. Seg¬ 
ments indistinctly annulate, rather coarsely two-ridged, showing on the 
subventral outline; on thorax only simply ridged; tubercles concolor- 
ous, setae fine and pale. Subdorsal anal black patches preceded by a 
narrow transverse band; anal point black ; body greenish. 
Stage V .—Head pale brown, darker on the clypeus, eye black; 
width 1.2 mm. Thoracic feet rather large, colorless, abdominal ones 
moderate on joints 6-11, 13. Body transparent, green from food and 
slightly so from blood. Anal flap distinct; rounded, marked with a 
deep black subdorsal patch on each side. Points rudimentary, dark; 
tracheae evident, d he larva comes out the apex of the house and eats 
the whole leaf. Single brooded; the larvae can be found till the mid¬ 
dle of June. (Cocoons formed on the ground.) On the willow at Van 
Cortlandt Park, N. Y. 
Pontania gracilis Marlatt. 
Galls on the willow at Van Cortlandt Park, N. Y. City and also 
sent me by Dr. Lintner in numbers from Gouveneur, N. Y., on Salix 
petiolata. 
Gall as described by Marlatt (U. S. Dept. Agr. Div. Ent., Tech. 
Ser. 3, p. 39), but not quite so large. Nearly spherical or a little 
elongated in the direction of the leaf, nearly evenly divided by the leaf, 
projecting half its width beyond the edge; single or rarely two on a 
leaf, situated near the petiole to one side of the midrib. Smooth, 
green, a few corky dots, very little red blush if any. Size 7 to 10 mm. 
in diameter. The shell is thin, containing a large hollow. 
Siage III .—Head .5 mm., lower half white, vertex above black, 
eye smoky blackish, jaws brown. Body opaquish white, rather densely 
finely pilose; thoracic feet quite large, abdominal ones on joint 6 to n 
and 13, small. Anal end obliquely sloping, dusky shaded dorsally on 
joint 13. No prongs. The larva can move the body violently up and 
down. 
Stage IV .—Head paler, dotted above; width .7 mm. Anal end 
round pointed from dorsal view with a few tiny dark specks. Body all 
opaquish white. 
Stage V .—Head pale brown, sometimes with a blackish shade in 
clypeus and up from eye, eye black; width .85 to 1 mm. Body whitish 
colorless, segments 3-annulate with slightly watery shiny tubercles on 
each, not distinctly pilose, the setae fine. A single, small, pointed, 
blackish minute tip to anal plate. The anal end is round pointed with 
a few dusky dots above. 
