Vol. xxix] ENTOMOLOGICAL NEWS. 123 



females of a previous brood can always be found lingering on 

 the plants long after the eggs have hatched and as late as the 

 time when 4th and 5th stage nymphs are present. The adult 

 was described by Mr. Edmund H. Gibson, who very kindly 

 and generously permitted us to include his description in this 

 paper. 



Egg. (Plate VII, fig. 2.) Length 0.55 mm., width 0.2 mm. Ellip- 

 tical, basal half translucent, outer half dark brown. Basal end acute 

 with rounded tip. Sides of apical half subparallel, slightly tapering 

 toward tip. Extremity of apical end truncate with rim-like collar and 

 central projecting cone-shaped nipple. 



First stage nymph. (Plate VII, fig. 3.) Length 0.62 mm. Shape 

 elliptical, dorsal surface of body brown, posterior half darker than 

 anterior half. Head bears three prominent tubercles arranged in a 

 triangle on dorsal surface. Dorsal surface of body, especially posterior 

 portion, and lateral margins of abdominal segments bearing compara- 

 tively prominent secreting hairs. Antennae one-third length of body, 

 white, sparsely covered with prominent secreting hairs. Rostrum 

 white, reaching to posterior pair of legs. Legs white. 



Second sta;/e nymph. (Plate VIT, fig. 4.) Length 0.8 mm. Shape 

 similar to that of first stage, but more oval in outline. Color darker 

 than that of first stage. Tubercles on head more pronounced. Bases 

 of hairs tuberculate. A single spine-like tubercle on lateral margins 

 of first and second thoracic segments and the second and remaining 

 abdominal segments, each tubercle bearing a glandular hair. A pair 

 of spine-like tubercles tipped with secreting- hairs on the dorsal sur- 

 face of the pro- and mesothorax and the second, fifth, sixth and 

 eighth abdominal segments. Antennae white, comparatively slightly 

 shorter than in first stage. Rostrum white, reaching to posterior legs 

 Legs white. 



Third stage nymph. (Plate VII, fig. 5.) Length i.i mm. Shape 

 oval, dorsal surface brownish black. Tubercles as in preceding stage. 

 Sides of thorax and abdomen margined. Eyes prominent. Antennae 

 one-third iength of body. Legs and rostrum as in preceding stage. 



Fourth stage nymph. (Plate VII, I'm. 6.) Length 1.42 mm. Shape 

 oval, dorsal surface brownish black. Eine light median dorsal line on 

 prothorax, broadening into a dorsal median spot on meso- and meta- 

 thorax and first abdominal segment. First two abdominal segments 

 slightly lighter at lateral margins. Tubercles similar to those of pre- 

 ceding stage, glandular hairs becoming spine-like. Tubercles of head 

 and thorax bearing several of these spine-like hairs. A spine-like Inir 

 anterior to each tubercle on pro- and mesothorax. Tubercles mi lat- 

 eral margins of abdomen each beariii:..' two spine-like hairs and some 



