﻿154 Journal New York Ent. Soc. [Voi. in. 



Criticism of Previous Descriptions. 

 The only notice of this larva, besides the mention of the food plant 

 by Dr. Thaxter (Can. Ent. XXIII, 34), is the one by Mr. Dyar, re- 

 ferred to above. This differs from the larvce before us in that no men- 

 tion is made of the yellow line on the anterior portion of joint 3. As 

 the determination was not made positively, it is possible that Mr. Dyar 

 may have had the larva of A. biguttata before him. In a letter written 

 in 1 89 1, is the following from Dr. Thaxter : The larvae of " both the 

 Limacodes you mention {biguttata and y-inversa) are very much alike, 

 green or slightly yellowish, slightly dome-shaped with slight longitudi- 

 nal ridges and certain lighter dorsal markings Quite dif- 

 ferent from scapha.'" 



Description of the Several Stages in Detail. 



Egg. — With the characters of the family. Reticulations obscure, 

 linear, rounded, scarcely angular, yet not separated into isolated areas, 

 not characteristic. Elliptical, 1.6x1.2 mm. Laid singly in nature. 

 Of the usual yellow color. 



Stage I. — Head entirely brownish black, enclosed in joint 2; 

 width .3 mm. (calculated .28 mm.). Rounded elliptical, the subdor- 

 sal and lateral ridges prominent, consisting of segmentary tubercular 

 elevations, causing the dorsal area to form a furrow, and the lateral to 

 be concave; ends square, subtruncate. Skin perfectly smooth, no 

 granules of any kind. Primitive tubercles i+ii represented by a series 

 of large, segmentary spines, double on joints 3 and 13, single, but 

 with a small knob-like projection about the middle on the other seg- 

 ments. (PI. VI, fig. 2.) On the abdomen these spines alternately 

 lean in and out, but their bases are not transposed. They can be 

 traced deep into the skin. Row on the lateral ridge (iii) similar, but 

 shorter and without projections; in line. (PI. VI, fig. i.) Color 

 whitish, dorsal space faintly greenish by transparency, subdorsal ridge 

 whitish the spines dark. Length 1.5 mm. 



Stage II. — Head green; width .4 mm. (calculated .39 mm.). 

 Shape as before (PI. VI, fig. 6, for outline). Lateral ridge not reach- 

 ing beyond the subventral one, which bears two setce on each segment. 

 Skin covered sparsely with small, clear granules which bear short 

 spines ; also some spines from the tubercles of subdorsal row, which 

 consist of two setae the whole length of the ridge ; lateral tubercles with 

 one long and many short setse. The setae differ from Stage I in being 



