THE CANADIAN ENTOMOLOGIST. 33 



three-quarters the width of the body in length. In mature pupse the rods 

 of the inner are usually longer than those of the outer series. These (the 

 inner series) are usually directed upward, and curve inward over the 

 dorsum of the body. Their length varies, rarely exceeding the width of 

 the body. The rods of the inner series usually alternate with from two to 

 five rods of the outer series, ihe average number of rods in the inner 

 series being about twenty. Irregularities in the position of the wax rods are 

 frequent; in fact, no two pupaj are exactly alike in this respect, but of the 

 hundreds examined none have been found to arise farther mesad from the 

 outer series than the width of their bases. 



On the venter the legs are indistinct, most readily seen in specimens 

 which have recently moulted. Each is short and thick like a truncated 

 cone, with a rounded disc or knob at the tip. They are transversely 

 wrinkled, and bear minute spines as in the two previous instars, and their 

 relative position remains unchanged. The rostrum (a conical, fleshy 

 papilla, from the apex of which the mouth setae protrude) is situated 

 on the middle line of the body, about one-third the distance from the 

 cephalic to the caudal margin, and nearly equidistant from the bases of the 

 four anterior legs. The antenns; now lie partly hidden in pockets 

 situated one on each side, just outside of the anterior pair of legs. They 

 are directed backward, and are straight, conical in form, the diameter of the 

 base being about one-half the length. They appear to be transversely 

 wrinkled near their apex ; no other signs of segmentation are visible. 

 There is a pair of spines situated on the ventral surface, one on each side, 

 below the operculum of the vasiform orifice, as in previous instars. 



Colour : greenish yellow ; empty pupa-cases white. Internal organs 

 in the basal abdominal region, one on each side, give to this part of the 

 body a bright yellow colour, as in previous instars. No eyes can 

 be distinguished when freshly moulted, but as the pupa matures, the 

 imaginal eyes appear as two brownish s[)ots in tne cephalic region. 



The length varies from .748 to .88 mm.; the greatest width, from .407 

 to .54 mm. 



The imagoes appear in from twelve to sixteen days. Thus, the time 

 which the insect spends in the immature stages, including the egg, is from 

 four to five weeks. 



Adult. 



$. The length of the body of the adult female varies from 1.15 to 

 1.20 mm. The colour of head and thorax is pale yellowish buff; 



