5<D ENTOMOLOGICAL NEWS. [Feb., 'l6 



Lombardy poplar. These greatly resembled nymphs of the 

 apple leaf -hopper, Empoasca wall Le Baron. One of these 

 first-stage nymphs was described on April 15, and the first 

 fifth-stage nymph was observed on April 25. The trees from 

 which the twigs were taken were not again examined until 

 July 31. On the latter date one adult was found on each spe- 

 cies of poplar. No egg pouches were observed. 



The following descriptions of the nymphal stages are 

 based on rearings made in the Cornell Insectary during the 

 spring of 1915. The drawings were made by the writer. The 

 adult was kindly determined for me by Prof. Herbert Osborn. 



R. L. Webster ( Ent. News, xxi, 265-266) states that "the 

 young nymphs were characterized by dull, reddish tibiae and 

 tarsi. The eyes and antennae were red brown." In the speci- 

 mens which the writer reared the tibiae were entirely pale and 

 the tip of the tarsi was dusky in stage I, more brownish in 

 stage II. The eyes were dark reddish and the antennae dusky 

 rather than red brown. 



The Egg (Fig. i). Empoasca obtusa spends the winter in 

 the egg-stage. On April 17 egg-pouches of this insect were 

 observed on the twigs in the Insectary. They resembled those 

 of Empoasca mail Le Baron, and were situated on the outer 

 side of the larger bud scales. (See Fig. 2. Tissue has been re- 

 moved to show anterior end of egg.) This differs somewhat 

 from the observations of R. L. Webster, who states that he 

 found the egg-pouches placed "in wood two or three years old, 

 which on poplar trees is comparatively soft wood." The buds 

 at this time were just beginning to burst. Eggs are placed 

 singly in the pouches. 



Length of egg, i.i mm.; greatest width, 2.7 mm.; pale translucent, 

 shining, cylindrical, rather strongly curved, bluntly rounded at posterior 

 end, tapering somewhat and more sharply pointed at anterior end. 



Stage / (Fig. 3). Length, i nun.; width of head, including eyes, 

 .36 mm. General color pale greenish yellow or pale translucent slightly 

 tinged with greenish. Thorax slightly suffused with dusky, eyes red- 

 dish. Antennae, except hasal segment, dusky. Legs pale translucent 

 tinged with dusky, tip of tarsi, and the claws darker. 



Stage II (Fig. 4). Length, 1.44 mm.; width of head, including eyes, 

 .414 mm.; general color pale greenish yellow. Eyes reddish. An- 



