57 



often with a more or less distinct pinkish shade; head still more concave in front, 

 with a trace of frontal tubercles; antennae blackish, the last three joints darkest, 

 still more slender than in the previous stage, the third joint at least as long as the 

 terminal two together; iirst joint much stouter and larger than the second; 

 brown; body regularly oval ; prothorax distinctly separated from the mesotl 

 by a distinct suture, its lateral margin sinuate; legs more or less dusky, apex of 

 tibiae and the tarsi dusky or blackish : nectaries almost as long as the third antenna] 

 joint, almost straight, but slightly curved toward the apex and slightly thicker at 

 base, reaching to the end of the penultimate segment ; tail still rudimentary, broadly 

 triangular, not projecting beyond the tip of the abdomen; pseudova apparently 

 mostly fully developed. 



Sixth or final stage. — Length, about 2 mm.; general color, pale greenish-yellow, 

 usually with a darker green medio-dorsal and occasionally a more or less distinct 

 subdorsal line ; marked along the sides and often at the posterior end of tin- body 

 more or less distinctly with pink or purple; frontal tubercles distinct, though rather 

 short and stout, without the gibbosity at inner side; antennae six-jointed, Blender, 

 about one-third the length of the whole insect; third joint longest, rather longer 

 than the last three combined: they are almost colorless, the la.^t two joints 

 blackish; eyes brown: prothorax considerably narrower than the next segment, 

 from which it is distinctly separated; all other segments confluent, with the sutures 

 more or less completely obliterated, the surface quite distinctly reticulated; legs 

 slender, of color of body, tip of tibiae and tar>i blackish: nectaries long, slender, 

 somewhat stoutest at base, slightly curved, reaching somewhat beyond end of body, 

 and rather longer than the last two joints of the antenna- combined; tail prominent, 

 slender, elongated conical, curved upward, about half the length of the nectaries, 

 covered closely with minute, acute scale or tooth-like projections and provided each 

 side with three or four rather long and slender, almost semicircnlarly curved, back- 

 wardly directed hairs: embryos fully developed; born soon after the last skin has 

 been cast. 



SECOND GENERATION*. 



Larva, recently deposited. — Length, about 0.7 mm. ; color, pale yellowish-green ; head 

 slighty dusky, eyes brown; antenna-, legs, and nectaries pale dusky: antenn 

 jointed, joints 3 and 6 longest and subequal in length: frontal tubercles about as 

 large as in the mature stem mother; nectaries stout, slightly thinnest at apex, and 

 rather longer than the fourth antennal joint. 



Female, mature form. — Length, 2.7 to 2.8 mm. : general color, yellowish-green or 

 greenish-yellow, the darker specimens with a distinct darker green medio-dorsal 

 line and a subdorsal row of six to seven somewhat transverse darker green s|>ots: 

 eyes brown, all members almost colorless, the sixth and seventh antennal joints 

 tarsi slightly dusky; frontal tubercles stout, with but a slight indication of gibbos- 

 ity and rather shorter than the first antennal joint ; antennae seven-jointed; first joint 

 almost twice as stout as the second, the third the longest and almost twice a>; long as 

 the fifth; body elongated oval, the prothorax well separated from the rest, all other 

 segments more or less confluent, except the last two or three: the whole surface 

 densely reticulated; legs slender and rather long: nectaries slender, reaching beyond 

 tip of abdomen, about as long as the third antennal joint, slightly curved and Bome- 

 what stoutest at base; tail similar to that of the stem mother. 



THIRD OK MIGRATOR? GENERATION. 



Pupa. — Length, 1.9 to 2 mm. : general color, pale greenish-yellow, some more green 

 ish and others more of an orange color, especially on head and thorax: antenna 

 and nectaries either almost colorless or of the color of the bod\ ; wingpads and tarsi 

 dusky or blackish; frontal tubercles very stout, the gibbosity blunt, round, and 

 somewhat more developed than in the female of the previous generation; antenna- 



