AST. 21. NOKTH AMERICAN SAWFLY LARVAE MIDDLETON. 13 



Color. — Head: Blackish above eyes, pale below; oye disks black; 

 antennal joints brown. Thorax : Legs brownish to blackish. Thorax 

 and abdomen, with supraalar and pleural rows of spots; remainder 

 of larva pale. 



Prepupa. — Appears same as other stages. 



Cocoon. — Spins no cocoon but prepupa cements particles of sand 

 or earth together into a capsule-shaped case, 11 mm. long by 6 mm. 

 broad, similar to other Tenthredinidae. 



Host. — Cephalanthus occidentalis Linnaeus. 



'Remarks. — Described from material collected June 27, 1912, at 

 Newington, Virginia, by S. A. Rohwer, and recorded under Hopk. 

 U. S. number 10145. At this time the flower buds varied from about 

 the size of a pea to the size of a marble. The larvae were of several 

 sizes and were found feeding solitary, on edge of the leaves. They 

 feed stretched along the edge of leaf but are sometimes found curled. 

 The larvae are easily disturbed and fall, curled, to the ground. All 

 the larvae had entered the ground for pupation by July 10, 1912, and 

 on June 7 of the following year adult sawflies were found in cage. 



Genus STRONGYLOGASTEROIDEA Ashniead. 



STRONGYLOGASYEROIDEA PALLIDICORNIS Norton. 



Larva. — Stage VI. 



Size. — Length 15 nun. Head: 2.5 mm. high by 2 mm. broad. 



Structure (from shed skin). — Head: Face view, circular in out- 

 line; epistoma with 4 hairs; labrum with 6 hairs; epicraiiium and 

 frons rather sparsely haired; eye disks not elevated, eyes slightly 

 convex; antennae of the telescopic type with 5 joints; maxilla with 

 palpifer and 4-jointed palpus, lacinia broad and flattened with a 

 number of setae (12) on apical margin; labium with palpiger and 2- 

 jointed palpus. 



Color (from rearing notes). — Head: Powdery, large dorsal black- 

 ish spot between posterior laterodorsal grooves and down vertex 

 to near the junction of the frontal epicranial sutures above frons; 

 eye disks black, with brownish black markings posterior to tliem. 

 Body: Tergum and pleurum bluish white, with bloom or white 

 powder and spotted with black, a middorsal row 1 per segment, a 

 subdorsal row 3 per segment, and alar or supraalar row 2 per seg- 

 ment; venter including legs and uropods, yellowish. 



Cocoon. — Spins no cocoon, pupates in cell of sand or earth 

 cemented together. Cell, capsule-shaped; length, 15 mm.; width, 

 7.5 mm. 



Host. — Buhus, species. 



Remarks. — Described from material collected July 29, 1913, at 

 Falls Church, Virginia, by William Middleton and recorded under 



