42 THE CANADIAN ENTOMOLOGIST. 



yellow ; the tubercles on 5th segment are tipped with three upright black 

 spines, the others with only one each ; nth segment with one large cen- 

 tral tubercle, the extreme base of which is white, remainder yellow with an 

 irregular circlet of small black warts about the middle, tipped above with 

 three small blunt black spines ; 12th segment with four short white tuber- 

 cles, anterior pair largest, tipped with four short black spines, posterior 

 pair with a single black spine. 



Lateral tubercles white, the upper row with a brown ring at base, the 

 lower with a black ring at base ; 2nd and 3rd lateral tubercles tipped with 

 seven black spines, 4th with five, remainder with one each. Spiracles 

 white, surrounded with a narrow black ring. Feet green, claws black, 

 prolegs green, claspers mauve. 



I received the larva from which the above description was taken by 

 mail, on August 1st, 1877, from J. C. Stockwell, Esq., of Danville, P. Q. 

 Unfortunately no details were given of its capture or food plant. In the 

 box in which it was sent were some black currant leaves ; as these were 

 withered, I obtained a fresh supply from the garden of a friend ; it fed on 

 these, but did not appear to be quite satisfied with them. I then tried it 

 with apple, maple, elm and various other leaves, but it would touch 

 nothing but the currant, and of that it ate less and less, finally, to my very 

 great disappointment, pining away until it died. It occurred to me after- 

 wards that it might have been found on the wild currant, as the leaves 

 sent with it seemed to be finer than those of the cultivated species. 



Although the form of this larva and the position of the tubercles is 

 similar to that of cecropia, the difference in coloration a\ ill at once dis- 

 tinguish them, the ground color being much lighter in Columbia, and the 

 green inclining as much to yellow in that species as it does to blue in 

 cecropia. The tints of the larva of Columbia are more decided, not having 

 the watery appearance noticeable in cecropia, the yellow being brighter and 

 the red more intense ; but the great points of distinction are the additional 

 red tubercles (as noticed by Mr. Bowles in 1864, see Can. Ent., vol. 3, 

 p. 201), and the absence of blue, the tubercles that are blue in cecropia 

 being white in Columbia. That this larva is generically the same as cecropia 

 is undoubted, the only distinctions being those of size or coloring. The 

 absence of blue in the larva of Columbia seems to be against the sup- 

 position that it is produced by the union of cecropia with prometlica, the 

 larvae of both these species being conspicuously marked with that color. 



