June, 1898.] Dyar: New Species AND LaRV/E of Sawfues. 13T 



The hairy, slimy, long-woolly or slender sings and all edge feeders 

 are foreign to the group. 



1. Resting flatly on surface of leaf, feet moderately developed, functional 2 



Leaf miners, feet functionless or absent 16 



2. Body with spines or points, distinguishable at least subventrally 3 



Body smooolh 15 



3. Two spines on second (spiracular) annulet 4 



Three spines on both second and fourth annulets 9 



4 Dorsum shaded with blackish in last stage, at least subdorsally 5 



Dorsum entirely green 6 



5. Head black spotted ; dorsum purplish, on Quercus alba. 



Periclista purpuridorsum 



Similar to the preceding Periclista diluta* 



Head black ; a subdorsal black line, on Chionanlhus. .Periclista chionanthi 



6. Head and spines blacc ; on Q. alba, Q. tinctoria Periclista albicollis 



Head and spines partly or wholly green 7 



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 



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 



9 Feeding on trees ( Quercus, Carpinus, Carya) 10 



Feeding on shrubs or vines ( Rubus, Vitis, Spiraa) 13 



10. Head largely black spotted, spines black ; on Q. prinus, Q. alba 



Isodyctium subgregarium 

 Head not spotted, spines mostly pale II 



1 1. Spines well forked, not degenerate 12 



Spines more or less degenerate in last stage ; on hickory ( Car) a) 



Isodyctium caryicolum 



12. Spines black at base and tip ; on Q. coccinea .... Isodyctium murtfeldtia.- 

 Terminal spines only black tipped ; on Q. alba . . . Isodyctium infrequens 



13. Spines well forked, dorsal ones wLh black limbs ; on raspberry [Rubus) 



Monophadnus rubi 

 Spines reduced to points 14 



14. Head and dorsal points black ; on grape ( Vitis) .... Ery thraspides pygmaea 

 All green, points while ; on meadow sweet (bpiriva). . . Blennocampa spirae 



15. Head black, body white and yellow ; on ash [Fraxinus) 



Monophadnus barda 



16. Mining in oak ( Quercus) Fenusa curta 



Mining in raspberry ( Rubus) Fen usa rubi 



Mining in alder (Alnus) Kaliosysphinga varipes 



Mining in poplar ( Populus) Entodecta populi 



Note Mr. Ashmead has kindly revised the generic references of 



* Insufficiently described. 



