132 ENTOMOLOGICAL SOCIETY 



Egg. Flat at the base, subcvlindrical, rounded above, the base broad 

 ened; soft, somewhat irregular in shape, the basal outline not always 

 circular; about twenty vertical ribs, increasing confluently by many more 

 at the flared base, confused with coarse reticulations at the vertex, which 

 is sometimes ring-like; distinct, fine, parallel cross-striae, forming fainter 

 reticulations at the vertex. Translucent white; diameter .5, height 

 .4 mm. 



Laid scattering on the backs of the leaves, solitary, but many on one 

 plant and perhaps none on the adjoining one. Larvae in various stages 

 at the same time. 



Stage II*. Head rounded, whitish, eye black, mouth brown; width 

 .3 mm. Body cylindrical, the feet normal; all translucent whitish, food 

 showing green. No perceptible tubercles; setae fine white, moderate. 



Stage ///.The same; head .4 mm. Body thick and robust with dis 

 tinct incisures, joint 12 slightly enlarged. Tubercles a little elevated, 

 colorless, transparent ; setae white, distinct. 



Stage IV. Head rounded, flattened before, bilobed, whitish, ocelli 

 black, mouth dark brown; width .6 mm. Body thick, joint 12 a little 

 enlarged, joint 13 small, subtruncate ; feet all equal. Translucent white, 

 the elevated tubercles concolorous ; no marks. Setae white, distinct. 

 Food green, but the blood is colorless. The larvae reach 6 mm. in length 

 and are robust and thick. Dorsal vessel greenish. A few of the tubercles 

 become finely black marked. Legs slender. 



Stage V. Head erect, slightly bilobed. flattish before; translucent 

 white, vertex black powdered; ocelli black, labrum blackish, quadrate; 

 width .85 mm. Body thick and robust, joint 12 slightly enlarged, feet 

 normal, slender. Translucent white, greenish tinted, food green; edge 

 of cervical shield and prespiracular tubercle on joint 2, tubercles 

 ia-f-ib and iia-|-iib on joints 3 and 4, i to iii on joints 5 to 12 all marked 

 with deep black, the spots on tubercle iii being the largest. Setae dis 

 tinct, faintly brownish ; tracheal line white with a white shading about it. 

 On the thorax tubercles ia and ib are united, iia+iib. iv-|-v, iii separate, 

 vi 2-haired. On abdomen i dorsad to ii except on joint 12 where they 

 form a square, iii large, situated above the brownish spiracle which is 

 much the largest on joint 12; iv and v in line, united on joints 5 to 9 

 though becoming less approximate posteriorly, separate on joints 10 to 12, 

 on the latter by a considerable space; vi single; vii on the transparent 



*Stage I was observed in the Keene Valley larvae, but I neglected to 

 record a measurement of the width of the head. It was not possible to 

 examine fully the youngest of the Stony Man larvae, so that I cannot 

 positively correlate mv results, but assume six stages from analogy with 

 C. dryopterata. In Stage I the larva is entirely colorless, the food 

 showing green. Tubercles large but without basal plates, primary ones 

 only present, iv and v in line or v a little dorsad, vi absent, vii a single 

 hair on the leg-plate. Setae rather long, simple. 



