272 THE CANADIAN ENTOMOLOGIST. 



EARLY STAGES OF BREPHOS IN FANS. 



BV DWIGHT BRAINERD, MONTREAL. 



Eggs laid April 25th, side by side, packed closely together on the 



twig at fork of leaf bud. The moth standing head downwards with half 



opened wings and " see-sawing " out a string of from three to twelve 



eggs. Between times it runs all over the twig as do the Tineids. Egg 



oblong, rounded at both ends, length .87 mm., width .46 mm. Sliglitiy 



roughened and punctured like the skin of an orange. Colour at first a 



delicate pea-green turning yellowish. The number deposited at the base 



of each leaf varied considerably, fiatched May 3rd to 5th. At birth 

 larva 1.6 mm., semi-transparent, light sap-green with evanescent purple 

 shades. Body cylindrical, of sam.e approximate size throughout, ending 

 in a strongly bifurcate anal segment. Head light yellow-brown ; ist 

 and 2nd epicranial and ist clypeal setae rudimentary, the remainmg 

 eleven primary setae well-developed blunt bristles. Ocelli prominent, 

 dark brown. Shield concolorous. True legs transparent, with dark 

 claws ; 4th prolegs fleshy, rimmed with brown ; the others not showing. 



Segments 3-wiinkled, tubercles uniform on the abdominal joints ; a 

 pair each side of dorsal line, a single one above, a pair below spiracles 

 and one above leg plate. Caterpillar a semi-looper, suspending itself by 

 a thread. 



Second stage. — 3.75 mm. Colour whitish-green, head yellow. 

 Inter-segmental spaces white and much swollen. 



Third stage. — Length 12 mm. Sap-green changing to apple-green. 

 Head and appendages, except claws, transparent. Body marked with a 

 double ad-dorsal and a stigmatal white line. 



Fourth stage. — Length 30 mm. Colour on dorsum apple-green to blue- 

 green, according to age. Head appendages and venter much lighter ; 

 almost yellowish. Tubercles simple, white, oval to round; setae short 

 and spinulate. Ad-dorsal line wavy, obscure, slightly broken. There is 

 a narrow double white line through abdominal segments on lateral 

 surface enclosing a darker area ; and stigmatal band is broad, white to 

 yellow-white. Spiracles red-brown edged with black, set in indistinct 

 white blotches. Body cylindrical, tapering from 12th segment. Pupated 

 June 1 2th. Food plant white birch. Pupa green at formation, changing 

 to dark' chestnut-brown. 14 x 4 mm., smooth. Extremities short, 

 rounded ; medial portion cylindrical, of equi-width ; the whole cocoon 

 approximately oval. Prothorax strongly mcised dorsally and pitted. 

 Frontal headpiece convex, hyaline. Maxillae re;ich nearly and antennae 

 fully to extremity of wing-covers. (4th a. s.) Abdominal segments 

 slightly indented down the back. Cremaster with a single stout hook. 



Mr. H. H. Lyman kindly measured the eggs, and I had the advan- 

 tage of Rev. Mr. Fyles's notes on the caterpillar. 



Mailed November 5th, 1897. 



