170 Journal New York Entomological Society. [Voi. v. 



(iv and v) which look long. Skin densely clear granular, the granules 

 large, coarse, conic as before, but less sharply pointed and situated 

 more closely along the lateral ridge. Tail quadrate, slightly laterally 

 notched. Color whitish green, a broad yellow line along the subdorsal 

 ridge, very slightly waved, edged with dark green as before. A faint 

 white line along subventral edge. All the depressed spaces (i) to (6) 

 indicated by yellowish dots, small, shallow, only (i) with a rather sharp 

 edge and fine granular bottom, the others nearly covered by the large 

 bordering granules. Subventral space very finely granular. Spiracles 

 round, whitish, normal, in line. Later the color becomes gradually 

 whiter, the subdorsal lines approach each other at the ends, but are 

 separated by a space of .5 mm. No transverse line on joint 3. Length 

 6.3-9.5 mm. Duration of the stage 8 days. 



Sfai:;e VII. — (Plate IX, fig. 8). Shape as described above. Skin 

 closely clear granular, frosted. Whitish green, clearer on joints 3-5 ; 

 broad subdorsal lines pale yellow, edged with dark green above and less 

 distinctly so below ; an obscure whitish subventral line. Subdorsal lines 

 free at the ends. Depressed spaces whitish, not contrasting, (i) and 

 (4) faintly dark centered. Granules rounded, not conic as before; not 

 contiguous, but the sides a little angularly adapted to each other. De- 

 pressed spaces very small, the smallest, as (2), covered over by the 

 granules which are a little smaller there than elsewhere. Space (i) a 

 small elliptical smooth area. Seta inperceptible. The shape is as in 

 A. y-inversa except that the lateral ridge is more prominent, exceeding 

 the subventral ridge. Length 9.5-12 mm.* Duration of the stage 7 

 days. 



Cocoon and pupa as usual. 



Food-plants. — Oak. Usually on Q. alba, less commonly on other 

 oaks. 



EXPLANATION OF PLATE IX. 

 Fig. I. Larva in stage I, dorsal view, enlarged X 60. 



" 2. Larva in s'age II, side view, enlarged X 3°' 



" 3. Larva in stage VI I, front view, enlarged. 



" 4. The same, side view. 



" 5. Moth of Apoda bigiittata, natural size. 



" 6. Granules of stage II, enlarged. 



" 7. Larva in stage VII, early in the stage, dorsal view. 



" 8. Larva in stage VII, mature. 



" 9. Granules of stage V enlarged, from area of subdorsal ridge. 



" 10. The same, stage VI. 



* A larva with six stages had the following lengths: I, .9-1.5 mm., II, 1.5-2.4 

 mm., Ill, 2.4-3.6 mm , IV, 3.6-5.5 mm., V, 5.5-8.4 mm , VI, 8.0-1 1.2 mm. 



