THE CANADIAN ENTOMOLOGIST. 19 



very minute. The ninth segment presents the appearance of having been 

 stippled with lamp black, and there is a less conspicuous repetition of this 

 marking on the twelfth. Pro-legs greenish, tipped with flesh color, the 

 two anterior pair still abortive Venter greenish with dark oval spots. 

 A sub-stigmatical fringe of fleshy shreds as observed on larvae of other 

 species. Duration of this period nine days. 



After Third Moult. — Length 28 mil. Body shaped and proportioned 

 much as after the last moult. Ground color the same bluish or greenish 

 cream, thickly sprinkled with brown dots. The same excrescence and ■ 

 black markings on the ninth and twelfth segments. The head is shaped 

 as after the last moult, is opaque white with black markings much as 

 before. Between the markings of the face and the gridiron-like marks 

 above, is a clear white space forming a sort of crescent-shaped mark at 

 the apex of either lobe. Piliferous spots brown, minute. Stigmata con- 

 colorous ringed with black. Legs more or less green concolorous with 

 venter. Black ventral spots conspicuous. Towards the end of this period 

 the stigmata appear with a black centre, and the crescent-shaped marks 

 assume a pinkish hue. Duration of this period seven days. 



After Fourth Moult. — Length 40 mil. Body rather more flattened 

 ventrally ; the hump on the ninth segment is more pronounced and the 

 skin is much wrinkled at the junctures of the segments. The ground 

 color has a more distinctly greenish tinge and the numberless dots with 

 which the body is thickly sprinkled are of a paler yellowish brown. The 

 black markings on the ninth segment extend on to the anterior portion of 

 the fourth pair of pro-legs. The twelfth segment also marked with black 

 as before, and the anal pro-legs streaked with the same. Piliferous spots 

 small and concolorous. Stigmata concolorous, ringed with black. Head 

 very large and prominent, face measuring 4 mil. each way, a trifle broader 

 superiorly. The gridiron markings above are suffused almost to the ex- 

 clusion of the ground color, and the lateral marblings are heavier black. 

 The mouth parts have a violet tinge. The two anterior pairs of pro-legs 

 still lack their full development. All the legs concolorous with the venter, 

 which is light bluish green. Duration of this period fifteen days or more. 



No more moults observed. 



Mature Larva. — Length 60 mil. Body same shape as before, thick- 

 est from the fifth to the tenth segment inclusive. The black markings on 

 the ninth, tenth and twelfth segments are constant, but in some cases- 



