﻿— 230 — 

 Preparatory stages of Schizura leptinoides (irote. 



BY HARRISON G. DVAR. 



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

 below ; minutely i)unctured, shinint^-, very pale ^^reenish yellow. 

 Diameter i mm. Laid siiioly on the under surface 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 f)()dy 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 forn-^ 

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

 bases of the legs, all small and bearing a few 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\'ae eat the parenchyma 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 broAvn. Dor- 

 sum brownish yellow, brighter on joints 3 and 4, and with a yellow- 

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

 joint II postetiorly. 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 trans\erse row of three, with the fourth in front. Diu^ation of 

 this stage four days. 



Third Larval .SrAciE. — Head pale brownish, mottled with 

 brown; a broad dark vertical band extends from each side of the 

 mouth to the \ertex 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 

 ])rocesses resembling humps on joints 8, 9 and 12. Besides the 

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



