ABT.21. NORTH AMERICAN SAWFLY LARVAE MIDDLETON. 31 



Remarks. — Material described was collected May 24, 1913, at 

 Charter Oak, Pennsylvania, by Thomas E. Snyder and recorded 

 under Hopk. U. S. number 11364% May 28, 1913. 



The larvae feed at the edges of the leaves from the under side. 

 By June 5, 1913, all the larvae had spun cocoons and on May 20, 

 1914, three adults had emerged. 



ACORDULECERA NIGRITARSIS Rohwer. 



Larva. — Stage VI ( ? ) 



Structure. — Head: Similar to A. hicoriae. Thorax: Similar to A. 

 hicoriae. Abdomen: Similar to A. foveata. 



Color. — Head : Chitinous parts brown or yellowish brown. Body : 

 Pale, legs with apical joints brown, basal joint occasionally yellow 

 brown. 



Cocoon. — Similar to A. foveata. 



Host. — Quercus Tnarllandica Muenchausen. 



Rerrmrks. — Material described was collected May 19, 1915, at 

 Springfield, Virginia, by William Middleton and recorded under 

 Hopk. U. S. number 13610. Adults emerged in cage May 2, 3, 5. 6, 

 and 10, 1916. 



ACORDULECERA MAURA Rohwer. 



Larva. — Stage VI ( ? ) . 



Structure. — Head: Similar to A. hicoriae. Thorax: Similar to A. 

 hicoriae. Abdomen: Similar to A. foveata but postepipleurite with 

 prominent crescent-shaped areas on urites 2 to 5 and 8. 



Color. — Head : Brown, brownish black across the posterior portion 

 of the vertex; eye disks black; antennae brownish black. Body: 

 Greenish white; legs yellowish or pale brown, no spots. 



Prefwpa. — Similar to larvae, excepting postpedes reduced and 

 pale yellowish white. 



Cocoon. — Similar to A. foveata. 



Host. — Ga^tanea dentata (Marshall) Borkhausen. 



Remarks. — Material described was collected August 10, 1916, at 

 East River, Connecticut, by Charles R. Ely and recorded under 

 Hopk. U. S. number 13656 ". 



All the larvae had spun cocoons on or gone into the ground by 

 August 24, and adults emerged August 28 and 31, 1916. 



