1917 ENTOMOLOGICAL SOCIETY. 113 



Description of Larval '"Stage. 



During January, February and March, ID Hi, several lots of larvae repi-esont- 

 ing various stages were received at Ottawa. From these the following notes were 

 made : 



First Instar. Length 3 min. Body pale green, no markings. Head con- 

 colorous with body, ocelli black. Tubercles black, conspicuous, each with a single, 

 rather long hair. Tlioracic feet semi-translucent; prologs concolorous with body. 

 Spiracles black. 



Second Instar. Length 5.5 mm. Head pale green, shining, of a glassy 

 appearance, ocelli black, mandibles reddish. Body pale green with the following 

 rather indistinct stripes: addorsal, subdorsal, and a stigmatal band, all pale whitish 

 in color. About midway between tubercles ii and iii is a tather wide, conspicuous, 

 bhickisli band. Tubercles black, setae dark. Feet concolorous with body. 



'lliird Instar. Length 9 mm. The larva in this instar is similar to second 

 instar but the longitudinal stripes are now quite distinct, the addorsal being 

 sinuous in outline. Spiracles- pale yellowish, rimmed with black. 



Fourfli Instar. Length 14 mm. Head green, cheeks pale brownish, clypeus 

 margined on outer sides with blackish. Body green with a more or less yellowish 

 retlcction. All the markings distinct: addorsal and lateral stripes and stigmatal 

 liand yellowish, the two former quite sinuous in outline. Subdorsal stripe- 

 margined below^, as before, with a blackish band. Thoracic shield margined 

 anteriorly wdth black. Spiracles yellow, black rimmed. Feet concolorous with 

 body. 



Fifth Instar. Mature Larva. Length 2S mm. Head reddish l)r(nvn. re- 

 ticulate with dark brown; clypeus with pale margins; ocelli black; epicranium 

 adjoining clypeus brownish; a noticeable pale space without markings is present 

 immediately above base of each antenna. The color of the body is now totally 

 different, being raw umber,' witli a faint greenish tinge. The stripes are in- 

 conspicuous unless examined with a lens and of a sordid yellowish-white color. 

 All are sinuous in outline. Tubercles blackish, each distinctly surrounded with 

 a ring of sordid yellowish-white; setas blackish; spiracles pure white with black 

 rim. Between tubercles i and ii there is a conspicuous yellowish-white spot, and 

 on each segment midway between the stigmatal band, and subdorsal stripe, a lateral 

 row of the same colored spots. The skin below spiracles is also spotted and streaked 

 irregularly. The stigmatal band on the thoracic segments is partly filled with 

 pale yellow, particularly on segment 2 and in the anterior half of this segment the 

 color is white instead of yellows Anterior edge of thoracic shield dark brown, 

 forming a distinct band. Thoracic feet shining, pale brown; prolegs dull, con- 

 colorous with venter. Length when mature 33 mm. 



The above notes were made upon a single larva received on March 1, which 

 was collected wdth many others by Mr. Fetch on February 29. 



In February (1916) several larvaj in last stage were received from Mr. Barton. 

 All but one were green, the exception being of a dull reddish color. In the send- 

 ing from Mr. Fetch, received on March 1, several instars were represented. All 

 these specimens were also green, with the exception of two, one of the latter being 

 a dull brown and the other a beautiful reddish -chocolate color. The mature 

 specimens were described as follows : — 



Green larvae. — Length 32 mm. Body yellowish-green. Markings as follows : 

 An addorsal line, a subdorsal line, a lateral line, and a rather indistinct stigmatal 



'According to Rldgeway. Nomenclature of Colors. 1912. 



8 K.S. 



