THE CANADIAN ENTOMOLOGIST. 33 



few dots. Lateral line less distinct and suffused with purplish. Beneath 

 livid; red-purple on segments 1-4. L. 32 m m. 



Scopelosoma tristigmata Grote. 



Eggs as in Morrisoni, laid April 24. 



First stage May 5. Not separable from Morrisoni. 



Second stage May 16, third stage May 22. In neither separable from 

 Mo7-riso?ii. 



Fourth stage May 28. Colored and marked as in Morrisoni, but the 

 colors decidedly brighter and the lines and setiferous tubercles more dis- 

 tinct. L. 15 m m. 



Fifth stage June 3. Somewhat lighter and more clearly marked than 

 Morrisoni. The setiferous tubercles of dorsum decidedly larger, affording 

 a reliable character for separation in this stage. L. 25 mm. 



Sixth stage June 8. Mature larva. Much like Morrisoni and readily 

 mistaken for it, but differing in the richer color, the more indistinct dorsal 

 and sub-dorsal lines ; but especially by the lateral line, which is broader 

 posteriorly, and differs in every instance by a distinct orange-yellow tinge, 

 which, though not particularly noticeable, is never present in Morrisoni. 

 Moreover, the superior sub-dorsal line does not extend to the head, and 

 is much less distinct. L. 30-35 m m. 



Scopelosoma devia, Grote. 



Eggs as in Morrisoni. 



First stage. Milky white. Head, legs, prolegs and anterior plate of 

 segment i, black. L. 2 m m. 



Second stage. Milky white, clearer than before. Setiferous tubercles 

 black. A faint purplish lateral and dorsal tinge. 



Third stage. Much as in the same stage of vimdenta, though paler. 



Fourth stage. Paler than any cf the preceding species, but nearest to 

 vinuienta, from which it differs by a tolerably distinct sub-dorsal line, and 

 by the absence of any purple shades on segs. 1-3, except above the lateral 

 line, which is white. Dorsum light bluish green, mottled with whitish. 

 Beneath very light colored. Prolegs black. Head black anteriorly, brown 

 posteriorly. 



Fifth stage June 10. Very near vi?mlenta, but much paler. Above 

 greenish white, with a bluish tinge and darker olive shades. Dorsal and 

 superior sub-dorsal lines distinct, contrasting with their edging of dark 

 olive. The region between the superior sub-dorsal and lateral lines is 



