June, 1898.] Dyar: New Species and Larvae of Sawflies. 
13 T 
The hairy, slimy, long-woolly or slender slugs and all edge feeders 
are foreign to the group. 
I. Resting flatly on surface of leaf, feet moderately developed, functional.2 
Leaf miners, feet functionless or absent.16 
Body with spines or points, distinguishable at least subventrally.3 
2. 
5 
7- 
8 . 
— 
Body smoooth. 15 
Two spines on second (spiracular) annulet.4 
1 hree spines on both second and fourth annulets.9 
Dorsum shaded with blackish in last stage, at least subdorsally..5 
Dorsum entirely green. 6 
Head black spotted ; dorsum purplish, on Quercus alba. 
Periclista purpuridorsum 
Similar to the preceding.Periclista diluta* 
Head black ; a subdorsal black line, on Chionanthus. .Periclista chionanthi 
Head and spines blacc; oa Q. alba , Q. tinctoria .Periclista albicollis 
Head and spines partly or wholly green.. .7 
Head with a black supra-ocellar shade and double spot in clypeus ; on Q. coccinea. 
Periclista emarginata 
Head green or with only a brownish spot in clypeus.8 
Clypeus brownish ; terminal spines dusky on the tips; on Q. coccinea. 
Periclista subtruncata 
All green, at least in last stage ; on Q. alba .Periclista media 
Feeding on trees ( Quercus , Carpimis, Carya ).10 
Feeding on shrubs or vines ( Rubus , Vilis, Spircea ).13 
Head largely black spotted, spines black ; on Q. prinus , Q. alba 
Isodyctium subgregarium 
Head not spotted, spines mostly pale.II 
Spines well forked, not degenerate.12 
Spines more or less degenerate in last stage ; on hickory (Cary a) 
Isodyctium caryicolum 
12. Spines black at base and tip; on Q. coccinea .... Isodyctium murtfeldtire 
Terminal spines only black tipped ; on Q. alba . . . Isodyctium infrequens 
Spines well forked, dorsal ones wuh black limbs ; on raspberry {Rubus) 
Monophadnus rubi 
Spines reduced to points.14 
Head and dorsal points black ; on grape ( Vitis).... Erythraspides pygmaea 
All green, points white ; on meadow sweet {spircea )... Blennocampa spirae 
Head black, body white and yellow ; on ash ( Fraxinus ) 
Monophadnus barda 
Mining in oak ( Quercus) .Fenusa curta 
Mining in raspberry {Rubus) .Fenusa rubi 
Mining in alder {Alnus) .Kaliosysphinga varipes 
Mining in poplar {Populus) .Entodecta populi 
Note.—M r. Ashmead has kindly revised the generic references of 
10. 
11. 
13 
14. 
*5 
16. 
* Insufficiently described. 
