244 Journal New York Entomological Society. [Vol. vi. 



the apex, the shaft of the spine pale. Color whitish, no marks except a 

 large brown cervical shield. Head pale, eye black, mouth brown. Skin 

 smooth as usual. Length .8-1.2 mm. Duration of the stage seven days. 



Stage II. — Elongate elliptical, joint 3 truncate before, tail broadly 

 square, scarcely notched at the sides. Dorsum and sides moderate, 

 not distinctly concave, nearly flat. Subdorsal ridge segmentarily 

 tubercular with large, low, round tubercles, bearing two short, blakc 

 setae, alternating, the tubercles of joints 5, 7 and 9 a little tipped 

 outward. Lateral ridge not tubercular, gently waved segmentarily. 

 Both ridges broadly covered with nearly contiguous granules, produced 

 with pale slender spines, several from a granule ; on the apices of the 

 tubercles and edge of the lateral ridge these spines are usually dark 

 and distinctly seen, under a high power, to be arranged in the form 

 of a radiating crown of 4 to 6 around an erect central spine (Plate XI, 

 Fig. 5). Dorsal and lateral spaces centrally nearly smooth, the 

 granules feebly developed. Depressed spaces indicated, slightly 

 sunken, not fully differentiated and protected between the setose 

 ridges. Color whitish, faintly tinged with green ; dorsum darker 

 from the food showing by transparency. Length, 1.2-1.9 mm. 



Stage III. — Elliptical, not much elongated, tail rounded, quad- 

 rate, distinctly notched at the sides. Dorsum slightly, lateral space 

 distinctly concave, subventral space very small and retracted. Sub- 

 dorsal ridge prominent, segmentarily beaded tubercular. Both ridges 

 with short, distinct black primary setae. Depressed spaces rather 

 large and distinct, especially (1) and (4), the other small ones 

 visible in a good light, none very sharply edged. Skin granules 

 large on the tubercles, bearing a crown of minute black spines, losing 

 these and grading off into smaller granules on the latticed ridges. 

 The paler spines on these ridges may be seen in favorable lights to 

 overhang the edges of the depressed spaces like minute fur. Lateral 

 ridge weakly segmentarily waved with single setae at the projections. 

 The latticed ridges are broad, several granules wide, the depressed 

 spaces finely granular in the bottom. Color frosted whitish, opaque, 

 no marks ; later all faintly bluish-green from the blood, still without 

 marks ; still later a narrow yellow subdorsal line appears in a series of 

 dots on joints 4 to 10, free, or connected by a short bar on joint 8, 

 either yellow or pinkish red. The brown rosette spines on the ridge 

 give a shade along all the ridges and joining at the ends. Length, 

 1.8—2.8 mm. 



