438 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



the contour in a somewhat irregular fashion. The tissue around the 

 egg is somewhat discolored and brownish but there is practically no 

 cracking of the bark over the egg. There is, however, a slight crack in 

 the bark where the egg is inserted. The eggs were found in all posi- 

 tions and aside from the fact that each egg is inserted resting on its 

 side, there appears to be no uniformity in deposition. 



Hatching takes place during the first week in May at a time when 

 the leaves are small and by the lastffew days in May and the first part 

 of June, the first adults appear. The bulk of the adults, however, 

 appears about the middle of June and from then on until the middle of 

 July and later they can be found scattered over the trees. Egg laying 

 takes place during the last of June and first part of July. Females 

 collected on July 2 and dissected were found to contain 8, 7, 3, 8 and 2 

 eggs each. 



There are five nymphal stages and the combined time necessary for 

 them to mature is about one month. The early stages are found on 

 the young unfolding leaves and leaf petioles, usually at the bases with 

 their heads downward although some can be noted in the reverse 

 position, sometimes three or four on a single leaf. As they become 

 older they disperse and move to the stems where they rest in similar 

 positions in the axils of the leaves or occasionally on the petioles. 



Practically all of the nymphal feeding takes place at such localities 

 and only rarely are the nymphs found on the leaves. Resting on the 

 stems as they do, they closely resemble buds. The cast skins are found 

 fastened securely by the beaks to the petioles and occasionally on the 

 upper and lower leaf surfaces, indicating where moulting takes place. 

 As a rule the nymphs are more or less sluggish and can be captured 

 readily. The adults are more active especially on bright, sunny days 

 but they also have the habit of resting mostly on the twigs. 



Egg. — Length, 1.1 mm.; greatest width, 0.19 mm. Translucent, subcylindrical, 

 elongate, curved, tapering to both ends which are rounded, basal end more broadly- 

 rounded than apical end. 



First Nymphal Stage. — Length, 1.2 mm.; width of head, including eyes, 0.35 

 mm. Elongate-elUptical; tapering gradually to posterior end; front sub truncate or 

 broadly rounded; dorsal surface sloping upward from lateral margin and forming a 

 median ridge. Light brown on dorsal and lateral surfaces; dorsal surface of this and 

 remaining stages specked with black; legs Hght brown except at coxal-femur joint. 

 Eyes lateral, prominent, consisting of a number of ommatidia. Antennae extending 

 beyond posterior margin of prothorax, two basal segments quadrate, subequal, apical 

 segment two and one-half to three times as long as basal segments combined, tapering 

 gradually to tip. A pair of minute spines on top and vertex of head and several 

 spines below on front and base of rostrum; all of these spines anteriorly directed. 

 Two minute, median pairs of spines on prothorax, one anteriorly and the other 

 posteriorly directed (one pair behind the other) ; on remaining thoracic segments, a 

 pair of posteriorly directed, median, dorsal, sUghtly curved spines with united base. 



