— 230 — 

 Preparatory stages of Schizura leptinoides Grote. 



BY HARRISON G. DYAR. 



Egg. — Of the shape of the upper two-thirds of a sphere, flat 

 below ; minutely punctured, shining, very pale greenish yellow. 

 Diameter i mm. Laid singly on the under surfece of the leaf 

 Duration of this stage, seven days. 



First Larval Stage. — Head depressed at the vertex, pale 

 greenish yellow, the lower third shaded with sordid brownish. 

 Width .5 mm. The body is slightly elevated dorsally at joints 5 and 

 12 and bears small warts, one per segment, row one anteriorly in 

 subdorsal space, two subdorsal (these rows taken on each side form 

 the "trapezoidal spots"), three more rows laterally and one on the 

 bases of the legs, all small and bearing a kw hairs. The warts of 

 row one on joint 2 are rather larger than the others. Color Yellow- 

 ish green, joints 5 and 12 and the subventral space, except on joints 

 6 and 13 crimson: feet black, except the anal pair, and these are 

 elevated. Length, after hatching, 2.5 mm. Duration of this stage 

 three days. The lar\ie eat the parenchvma and not the whole leaf, 

 until the second stage. 



Second Larval Stage. — Head rather higher than wide, the 

 lobes rounded, dark wine red, blackish on the flattened front. 

 Width 8 mm. Body a little enlarged dorsally at joints 5 and 12,. 

 which, with the ventral and lateral regions, are dark brown. Dor- 

 sum brownish yellow, brighter on jointrs 3 and 4, and with a vellow 

 patch of triangular shape on joints 10 and 11, ending abruptly on 

 joint II posteriorly. Warts as before, small, with a few hairs. 

 Length 5 mm. As the stage advances the whole body becomes 

 dark reddish brown, finely mottled with yellow, especially so at the 

 sides of joints 3 and 4 and dorsally on joints 6 and 7. On joint 10 

 is a small, bright yellow, oval patch, touching on joint 11 a larger, 

 hemispherical, similarly colored spot, containing four partly con- 

 fluent brown spots, its base toward the anal end, the contained spots 

 in a transverse row of three, with the fourth in front. Duration of 

 this stage four days. 



Third Larv.\l .Sta(;e. — Head pale brownish, mottled with 

 brown ; a broad dark \'ertical band extends from each side of the 

 mouth to the vertex of the lobe, once dentate inwardly above the 

 middle ; triangular plate and labrum pale. Width 1.3 mm. A 

 dorsal process on joint 5 surmounted by two tubercles and slighter 

 processes resembling humps on joints 8, 9 and 12. Besides the 

 tlorsal tubercles that surmount the humps, there are two lateral and 



