ART. 21. XORTH AMERICAN SAWFLY LARVAE MIDDLETON. 9 



area bilobecl on urites 1-7, siiifrle lobed on iirites 8 and 9, and want- 

 ing on nrite 10 ; pleiinim ; preepipleiirite and postepipleurite, separajte 

 and distinct on urites 1-8. not separate, but forming an epipleurite 

 on urite 9, and not recognizable on iirite 10 ; hypopleurite and nro- 

 pods on urites 2-8; hypopleurite undeveloped or absent and uro- 

 pods wanting on urites 1 and 9; hypopleurite not distinguishable, 

 postpedes present, and postcallus moderately haired and not espe- 

 cially prominent on urite 10. 



Color. — Head: Epicranium mostly brownish black, excepting pos- 

 terior laterodorsal grooves, which are white and a white area ex- 

 tending across pleurostoma below eye disks and along the frontal 

 epicranial sutures; eye disks black; remainder of head, excepting 

 labrum and mandibles, white; labrum and mandibles yellowish- 

 brov*n. Thorax and abdomen : dorsum above alar region blackish 

 with pale, narrow, middorsal, longitudinal stripe and large whitish 

 subdorsal spots on B^-2, C^-'^ and D; alar area dark; pleurum and 

 venter, pale but for preepipleurite and postepipleurite which have 

 dark markings; ultimate segment, dorsum above pleurum grayish — 

 darker at the cephalad laterad angles and darkest at a moderately 

 large blackish spot on the dorsad caudad margin of the epiproct; 

 pleurum and venter, pale. 



Prejiufa. — 



Structure. — Head : Similar to that of the larva, but bare excepting 

 for four hairs each, on epistoma and labrum. Thorax : Similar but 

 bare. Abdomen: Similar but bare, including epiproct and post- 

 callus. 



Color. — Head: Pale with black eye disks. Thorax and abdomen, 

 pale with a feAv faint grayish markings on pleurum and a number on 

 the dorsum. 



Cocoon. — Pupation occurs in a capsule-sha])ed cell of sand or earth 

 cemented together by the prepupae. Cell 12 mm. long by 8 mm. 

 broad. 



Host. — Sambucus canadensis Linnaeus. 



Remarks. — Material described was collected at P^ast River, Con- 

 necticut, on September 3, 191G, by C. R. Ely and recorded under 

 Hopk. IT. S.^number 13660;?^-2. Prepupae first appeared September 

 14 and by October 9 all were in the ground. Adults emerged in the 

 latter part of May and early June of the following year. 



MACROPHYA NIGRISTIGMA Rohwer. 



Larva. — Stage VI. 



Structure. — Head: Face view, circular in outline, viewed from 

 side wedge-shaped; epistoma Avith 4 to 6 spines; labrum with 6 

 spines ; f rons moderately haired, epicranium densely but finely haired ; 

 eye disks not elevated, the lenses slightly convex; antennae of the 



