8 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.61. 



Prepicpa. — Size. — 14.5 mm. long. Head : 2.33 mm. high b}' 2.2 mm. 

 broad. 



Structure. — Similar to stage VI larva. 



Color. — Much as stage VI larva ; vertex of head undarkened ; 

 spiracles blackish. 



Cocoon. — Pupation occurs in a capsule-shaped cell of sand or earth 

 cemented together by the prepupae, similar to those made by certain 

 other Tenthredinidae, 13 mm, long by T mm. broad. 



Host. — Sambuciis canadensis Linnaeus. 



Iie?narks. — Described from material collected June 26, 1912, at 

 Falls Church, Virginia, by S. A. Rohwer, and recorded under Hopk. 

 U. S. number 10144. The larvae were of various sizes at time of col- 

 lection, the fourth to sixth stages being present. The elderberry 

 was in flower or with joung fruit at this time. The larvae sit either 

 flat on edge or somewhat curled on the under side of leaf. All the 

 larvae had entered the ground for pupation on July 13, 1912, and 

 June 3, 1914, adults emerged in the rearing cages. 



MACROPHYA TRISYLLABA Norton. 



Larva. — Stage VI. 



Structure. — Head: Face ^'iew, circular in outline; epistoma with 

 4r-6 spines; labrum Avith 6 spines; frons and epicranium moderately 

 haired; eye disks not elevated, eye lenses slightly convex; antennae 

 of the telescopic type with 5 joints; maxilla with a palpifer and 

 4-jointed palpus, lacinia broad and flattened, with a number of setae 

 (10-12) arranged on the apical margin (similar to M. epinoi^f, see 

 fig. o") ', labium with a palpiger and 2-jointed palpus. Thorax: 

 Tergum ; prothorax composed of A, B, C^~^, and D ; mesothorax and 

 metathorax composed of A, B^-^^ C^-% and D ; in prothorax A and D 

 are bare while B and C are sparsely spined; in mesothorax and 

 metathorax A is haired, B^ bare, B- sparsely spined, C^ sparsely 

 spined, C^ and D bare; alar area large, not distinctly separated from 

 preepipleurite and sparsely haired in the mesothorax and meta- 

 thorax; alar area absent in prothorax; pleurum; preepipleurite not 

 large, sparsely haired; postepipleurite large and sparsely haired in 

 the prothorax, small and bare in the mesothorax and metathorax; 

 prehypopleurite chitinized, triangular and sparsely haired; posthy- 

 popleurite rather small and sparsely haired; legs with 4 joints and 

 an apical claw, joints sparsely haired and j.unt 3 with a long, broad, 

 and well chitinized extension at apex on inner side of leg. Abdo- 

 men : The tergum consists of A, B^-% C^■^"^ and D on urites 1-8, 

 with urite 9 the same, excepting that B and C are but indistinctly 

 subdivided and a subdivision of C is wanting, and with urite 10 con- 

 sisting of an epiproct without pseudocerci; spiracular area with 

 spiracle present on urites 1-8 and wanting on urites 9 and 10; alar 



