THE CANADIAN ENTOMOLOGIST. 



325 



NOTE ON THE LARVA OF HEMILEUCA CALIFORNICA, 



WRIGHT. 



BY HARRISON G. DYAR, NEW YORK. 



In Can. Ent., 1S9+ (Vol. XXVI., p. 293), Prof. G. H. French 

 described the early stages of this species, but failed to get the larvse past 

 their second moult. Prof. French kindly sent me eggs, and 1 have raised 

 the larva through all its stages. It is, however, exactly like the normal 

 H. main, already described by Prof. Riley and Dr. Lintner, as we might 

 expect from the position to which the moth has been assigned. I will, 

 therefore, not take up space to redescribe the several stages in detail. The 

 characters of the tubercles and setje are such as I have described for the 

 Hemileucidje (Trans. N. Y. Acad. Sci., XIV., 55), and are the same as 

 in Pseudohazis. In my account of the genus (Psyche, VII., 91), the 

 statements about the arrangement of the setae are inaccurate, owing to 

 insufficient amplification (only a lens was used). I add, therefore, 

 figures of the thoracic and abdominal setre, stages I. and II. of Hemileuca, 

 showing the true arrangement, and these may be considered to stand also 

 for Pseudohazis. 



It will be noticed that stage I. 

 (Fig. 23) represents a primitive 

 first stage, with tubercles iv. 

 and V. consolidated and all the 

 tubercles except three on the 

 cervical shield and tubercle ii. 

 on abdomen hypertrophied. In 

 stage II. the tubercles are con- 

 verted into elongate warts by 

 the addition of setae, but no 

 sub-primary tubercles appear. A 

 few secondary setae may be dis- 

 tinguished, and these become 

 abundant in later stages, parallel 

 with the increase in number of 

 spines on the elongated warts. 



The peculiar shortening of vvart i. takes place in stage III., and hence is 



not shown here. 



