New York Agricultural Experiment Station. 389 



Second insiar: (Fig. 17, b.) Vertex not so much prolonged. Median carina at 

 apex reduced so that the paired carinae of vertex and front meet at nearly the same 

 point. Front with another pair of carinae just in front of eyes, parallel to the inner 

 pair and joining the carinae of the vertex above the eyes. Sides of pronotum bent 

 downward so that the anterior portion appears as a lateral sclerite behind the eyes. 

 Front femora and tibiae laterally compressed. 



Color. — Head white with brown specks. Front with two fuscous lines between 

 inner carinae. Thorax white between the outermost pair of carinae and thinly specked 

 with brown. Outer part plain fuscous with a few white spots near the carinae and 

 outer edge. Abdomen brown and white mottled. Under parts white, thinly specked 

 with pale brown. Legs white with a few pale brown bands. Tips of tarsi dark. 



Size. — Length 1.3 mm.; width .75 mm. 



Third instar: (Fig. 17, c.) Vertex shorter. Front with a small median carina. Sides 

 of meso- and metanotum directed posteriorly forming short wing-pads, the first barely 

 overlapping the second. Fore femora compressed and with a rudimentary foliaceous 

 extension on the upper and lower edge. 



Color. — Head and thorax fuscous, with roundish white spots mostly clustered 

 around median area and outer edge. Abdomen mottled; where fuscous predominates, 

 the white takes the form of round spots. Underside mostly pale. Legs spotted and 

 banded with fuscous. 



Size. — Length 1.8-2.3 mm.; width 1.0-1.3 mm. 



Fourth insiar: (Plate XI, fig. 1.) Sides of pronotum form roundish lateral plates 

 back of antennae and above front coxae, and separated from dorsal part of pronotum 

 by two oblique parallel carinae which run about in line with the edge of the meso- 

 thoracic wing-pad. Wing-pads well developed, the first distinctly overlapping the 

 second. Foliaceous extensions of the front femora well developed. Brushes of waxy 

 filaments not as conspicuous as in previous instars. 



Color. — Upper parts and sides of thorax fuscous marked with roundish white 

 spots. Under side of abdomen pale. Tips of wing pads with large white spots, bases 

 plain fuscous. White predominates on hind portion of abdomen. Legs fuscous, with 

 numerous white spots. Tarsi white at base. 



Size.— Length 2.8-3.2 mm.; width 1.7-2.0 mm. 



Fifth instar: (Plate XI, fig. 2.) Vertex relatively short. Outer pair of frontal carinae 

 most prominent; median as prominent as inner pair. Front wing-pad laps over the 

 Becond nearly to its tip. Secretion from abdominal glands inconspicuous. 



Color. — ■ Ground color of different parts varies from pale brown to fuscous or black; 

 everywhere specked with numerous small white spots. Lateral lobe of pronotum 

 with a large black patch covering the upper half and extending along the front edge 

 of pronotum toward the median line. Hind edge of metathorax with a large trans- 

 verse black blotch on each side of median line. Fourth abdominal segment with an 

 ill-defined median black blotch. Fifth segment with a pair of black spots half-way 

 between median line and sides. 



Size.— Length 3.5-3.8 mm.; width 2.3-2.8 mm. 



General characters of adult.— (Plate XI, fig. 3). The adults are 

 characterized by having a short vertex, prominent eyes and broad 

 leaf-like front femora. The insects normally sit with the tip of 

 the abdomen close to the branch and the head held away so that 

 the long axis of the body makes an angle of about 45 degrees with the 

 branch. The hind legs are doubled up tightly, the tibiae fitting into 

 grooves in the distal part of the femora. The former are armed with 

 a row of 4 to 6 spurs on the outer carina and a crown of eight stout 

 spurs on the tip. These spurs give a firm contact with the 



