NORTH AMERICAN SAWFLY LARVAE IMIDDLETON. 



17 



inclusive, possessing well-developed preepipleurite, postepipleurite. 

 hypoplenrite, and uropods, the preepipleurite, postepipleurite, and 

 uropods with a few short hairs ; urites 1, 8, and 9 preepipleurite and 

 postepipelurite not distinct as two separate areas but united to form 

 an epipleurite; the hypopleurite not distinct as an area and the 

 uropods not developed; urite 10, the pleurum is not developed as in 

 preceding urites. postpedes are present and the posteallus is moder- 

 ately prominent and haired. 



Color. — Head: Tan, eye 

 disks black, niouthparts 

 brownish. Body: Dull, pale 

 whitish green. 



Cocoon. — 9 mm. long by 4 

 nom. broad; coarse, single- 

 Availed and capsule -shaped; 

 light brown in color and spun 

 in ground. 



Host. — Amelanchier cana- 

 densis (Linnaeus) Medicus. 



Rcin,arhs. — Described from 

 material collected July 16, 

 1916, at East River, Connecti- 

 cut, by C. R. Ely and 

 recorded under Hopk. U. S. 

 number 13649^^ The larvae 

 at the time of collection were 

 (juite small and were found feeding on the under surface of leaves. 

 All the larvae had become prepupae, entered the ground and spun 

 cocoons by September 19, 1916, and on May 21 of the following year 

 adults appeared in the cage. 



PTERONIDEA WINNANAE Rohwer. 



Larva. — Stage IV. 



Size. — Length, 7.5 mm. Head: 1 mm. high by 1 mm. broad. 



Structure. — Similar to stage V. 



Stage V. 



Size. — Length, 11 mm. Head: 1.25 mm. high by 1.17 mm. broad. 



Structure. — Similar to stage VI. 



Stage VI. 



Size. — Length, 14 nmi. Head: 1.5 mm. high by 1.5 mm. broad. 



Structure. — Head: Face \iew, circular in outline; epistoma and 

 labrum with 4 hairs each and epicranium and frons, sparsely haired; 

 eye disks not elevated and eyes slightly convex ; antennae of the cone 

 and disk type, cone as long as basal diameter, membrane with disks 

 slightly prominent, disks, except outermost, are bands partially sur- 



-Pteronidea amklanchieridis Rohwhr. 

 Maxilla. 



