jane, 1898.] Dyar : New Species and Larvte of Sawflies. 
133 
in a longitudinal plane. Segments scarcely annulate. Thoracic feet 
large, abdominal on joints 6-12, 13. 
Stage III —Waxy white, shining, eye black ; width .6 mm. Body 
pale green, principally from the food. Furcate spines moderate, con- 
colorous whitish. Feet pale. Length, 5.5 mm. 
Stage IV. —The same. Head .8 mm., length, 6 mm. The body be¬ 
comes darker green from the food, but the blood is pale green, tinting 
the subventral area. 
Stage V .—The same; width of head i.t mm. 
Stage VI. —Entirely green, no marks. Furcate spines rather short; 
seeming remote, none dark ; arrangement as usual in Periclista with 
but two spines on the spiracular annulet. Head greenish white, eye 
black; width T.4 mm. Rarely some of the spines are trifid instead of 
bifid. A variety occurs with a black patch in the clypeus, but it dis¬ 
appears in the last stage, leaving the larva immaculate. Segments 
indistinctly annulate. 
Stage VII. —(Ultimate.) Smooth, all greenish, not shining; head 
•and thorax emerald tinted ; dorsal vessel green. Enter the earth and 
form cells. Single brooded, common on the white oak in May, the 
| -commonest of the early spring slugs. Van Cortlandt Park, Bronx Park, 
Bedford Park, Pelham Manor, N. Y.; Fort Lee, N. J., Brookhaven, 
Bellport and Yaphank, Long Island. 
Key to the American Species of Periclista , 9. 
1. Yellow with brown thorax; no black above.diluta Cress. 
Prevailing color black.2 
2. Black of dorsum mixed with brown, abdominal segments very narrowly white 
bordered...purpuridorsum Dyar. 
Entirely black above. .3 
3. Clypeus somewhat angularly emaiginate.4 
Clypeus more broadly and shallowly emarginate or truncate.5 
4 Slender, legs whitish and amber brown ; vertical groove from lower ocellar basin 
distinct.emarginatus Mac G. 
Robust, legs shadir g to black on femora ; vertical groove from lower ocellar basin 
short.albicollis Nort. 
5- Clypeus shallowly emarginate. .6 
Clypeus truncate, scarcely at all emarginate.7 
6. Legs heavily shaded with blrrkish brown ; transverse groove between upper ocelli 
straight, s ightly crossed by the vertical groove.subtruncata Dyar. 
Legs mostly wh tish below the femora ; transverse groove slightly bent at junction 
with vertical one, not crossed by it..chionanthi Murtf. 
7 • Regs pale, femora brownish, abdomen brownish at sides posteriorly; vertical 
groove short, the lower ocellar basin reaching nearly to the transverse groove. 
media Nort. 
