LSI TUk CANADIAN K.NTuMoUMilsT. 



joints, 6 : 6: 19: 9 (measured from cast nympluil skin) ; proihorax, lat. : 

 long.:: 6: 4:?. Tlie antenna.* and legs grow comparatively slenderer, but 

 the number of joints does not change. Ihe cleft spine on the outer side, 

 subapically, of the posterior tibiie still persists. The other details omitted 

 are as in the previous instars. 



nimensions of nymph, taken from balsam mounts : Length, 1..32, 1.20 

 mm.; width, .8 to .72 mm. 



I'our. five and six days later, respectively, they moulted the third 

 time. 



Nymph. — 4th Instar: ,\ntennal joints, 12: q: 10: 24; rostrum, 

 rostral joints, 7:6: 17: 9. 



Owing to having nothing but moulted skins, a number of details must 

 be omitted in this and the next stage of the nymph. The general form, 

 asjK'Ct and coloration are as before, the main changes noticeable being in 

 the increasing slenderness of the legs and antennte. In this and the 

 preceding instars, the spiracles can be seen in the cast skins, as little round 

 openings in the connexivum. In the entire bug I have not been able to 

 locale llutn. The basal joint of the antcnnie is stout and curved, as 

 before, and there is no change in the relative thickness among ihcm. The 

 other details are practically unchanged. The first pair of legs is the 

 stoutest, especially as to the tarsi, and these are single jointed in all the 

 legs. 



The fourth moult took place two and four days after the third. 



Nymph. --5th Instar: Antennal joints, 20: 13: 13: 35; rostral 

 joints, 6: 4 : 21 : 10. With slight differences, the other details are as 

 before. The tarsi continue single jointed, with long, simple daws, the 

 posterior tibiiv are s])ined toward the end, the spines increasing in number 

 from the femoral to the tarsal extremity, and stout in proportions. The 

 cleft spine mentioned before is still present, but is not so noticeable. In 

 this instar, though still greenish in colour, with darker spots, lines and 

 markings, the silvery patches, so characteristic of the adult, first make 

 their appearance. The female can in this instar be already distinj^uished 

 from the male on account of its larger si/c, ami less prominent genital 

 segments. The males are so much smaller in this instar than the females, 

 that they may be mistaken for nymphs in the fourth instar only. The 

 dimensions of the nymph, taken from the cast skins, mounted in balsam, 

 are not quite accurate, as the skins are much distoited. Length, 2.14 

 mm.: wiilth, 1.25 mm. Ihe fifih, and last moult, took place seven, eight 

 and ten days later, respectively. 



I 



