218 



ENTOMOLOGICAL NEWS. 



[June, '18 



Larva. (Fig. I a). 6-9 mm. in length, i mm. in diameter, 12-seg- 

 mented. elongate-cylindrical, narrowed anteriorly, the first segment 

 being small, the second and third larger, the following segments of 

 about equal length, nth and I2th segments slightly enlarged. Head 

 small, two chitinous rods supporting the mandibles extending into the 

 third segment, head and these rods brownish-black. Remaining body 

 semi-transparently yellowish-white. Respiration metapneustic, two 

 slender tracheal trunks extending all along the body, giving off 

 branches to each segment, their openings near together in a groove 

 at the dorsal side of the I2th segment; two shorter tracheae, which 

 extend through segments 11 and 12, likewise opening into this groove. 

 Dorsally, on the I2th segment, on both sides of the respiratory 

 groove, two triangular lobes formed by the integument ; two similar 

 lobes placed somewhat behind the latter and lower on the same segment. 

 On the anterior border of segments 3-8 a narrow row of minute 



a 



Figure i. Early stages of Argyra albicans Lw. a. larva ; f>. pupa, ventral view ; 

 c, pupa, lateral view ; d, earthen cocoon with empty pupal shell projecting from it. 



spines. Similar rows of minute spines on ventral side. Otherwise 

 the cuticle smooth, glassy, shining, not striated. Edges of segments 

 5-10 somewhat prominent, reminding of vestigial prolegs. 



Pupa. (Fig. i b and c). 3-3.5 mm. in length (with breathing-tubes 

 4 mm.). Length of the breathing-tubes I mm. Dorsoventral diame- 

 ter of thorax 1.5 mm. Conical; thorax considerably thicker than ab- 

 domen, the latter narrowing down towards the tip. Head large, two 

 black tubercles at the front, placed narrowly together, two small ones 



