Dec. 1897.] 
Dyar : New Sawflies, and Larv/E. 
195 
ventral region white; a gentle white bloom; feet colorless. Segments 
6-annulate. Joint 2 and the anal flap white. No points on the body 
and no spots. 
Ultimate stage .—Head pale, pale silvery gray over the vertex- 
Body neatly 6-annulate, shining, dorsum pale greenish, silver gray end¬ 
ing above the tracheal line, brownish on joints 12-13; subventral 
region and legs pale, waxy greenish. Folds shaded with tarry brown. 
Spiracles dark. 
Pontania robusta Marlatt. 
No gall, but a portion of the leaf simply folded over. The egg is 
deposited under the lower epidermis near the edge, not far from the 
petiole. The larva eats little patches of the parenchyma on the under 
side scattering three-fourths of the way to the apex, apparently while 
the leaf is young; these patches are slightly swollen, discolored, pale, 
and as a result the outer fourth of the leaf folds back, neatly touching 
the surface, forming a hollow in which the larva lives. Finally the 
larva eats the whole leaf, emerging from its house and eating the apex 
of the leaf to return to the house again after feeding. The leaf is not 
rolled at all, simply folded. Fresh eggs were found May 9th. At that 
time the young leaf was neatly folded back though not fully grown. On 
expanding the folded part it was seen to be slightly larger than normal, 
forming a lobe on the leaf. The egg was situated under the lower 
epidermis, elliptical, white, .4X.8 mm. 
Stage I .—Head .35 mm. wide; all whitish translucent, the food 
showing by transparency. Head shining, body less so, the segments 
indistinctly 3-annulate; setae fine, white, apparently a row on each 
annulet. Anal prongs colorless. Thoracic feet spreading. Length 
1.5 mm. 
Stage 11 .—Head .5 mm., pale brown, eye black, mouth brown. 
Body slender, colorless, translucent; segments irregularly 3-annulate, 
the first annulet flat, not bulging. Setae whitish, very obscure. Anal 
segment somewhat swollen, prongs short. Feet on joints 6-11, 13. 
Stage III .—Width of head .7 mm. As in the last stage. The 
apex of the leaf is not eaten, the larva still feeding on the parenchyma 
in a patch around the anterior edge of its house. 
Stage IV .—Head 1 mm. The same. One was observed to 
emerge at the posterior end of the house near the petiole. 
Stage V .—Head very pale brown, dotted, shining, eye narrowly 
black, jaws large, black, width 1.3 mm. Body shining, translucent, 
