144 THE CANADIAN ENTOMOLOGIST. 



In due time two butterflies appeared from the striped chrysalids, and 

 simultaneously with them a large ichneumon fly with bright blue wings 

 and saftron body.* I felt some surprise at finding it in the box, and did 

 not at first suspect where it came from ; but when others appeared I 

 examined the chrysalids and found several tenantless. Eight of the fifteen 

 were infested. These flies are very sluggish, clinging closely to the sides 

 of the box, and making no effort to fly unless disturbed. 



LARV/E OF CERURA OCCIDENTALIS Lint., AND C. 



BOREALIS, Bd. 



BY G. H. FRENCH, CARBONDALE, ILL. 



During the past season I have had an opportunity of raising the larvae 

 of these two interesting species of insects, and as I do not know of any 

 easily accessible description of either in the larval state, I give below 

 the descriptions from my note book for the benefit of the readers of the 

 Entomologist. 



Ceriira occidentalis. — Length when full grown 1.25 to the bifurcation 

 of the anal segment. It is of nearly uniform size, a trifle enlarged 

 anteriorly. In about the middle of the subdorsum of joint i is a jjrom- 

 inent projection on each side, the body sloping from these down to the 

 rather small head. There is but little sloping from these back to joint 9 ; 

 from this there is a rapid sloping to the anal segment, this ending in two 

 projections extensible at pleasure, instead of anal legs. When withdrawn 

 these are a little more than a cjuarter of an inch, but may be extended to 

 three-quarters. These are usually carried elevated backwards, but when 

 extended are often thrown over the back as though used for defence. The 

 general color is clear bright green, the sides spotted with clear purple 

 brown, the spots round the stigmata and at the base of the legs and pro- 

 legs the largest. The back is marked with lilac, varying in shade and 

 arranged as follows : From the two small contiguous tubercles on the 

 back of joint 2 to the head is a somewhat diamond shaped space, the 



* This insect has been kindly determined by E. T. Cresson, of Philadelphia, as 

 Ichneumon rnjivtutris. — Ed. C E. 



