HOMOPTERA 



405 



this insect has been worked out by Funkhouser ('17). The n}TTiphs 

 feed on succulent herbs, particularly sweet clover; the eggs are laid 

 on young trees, particularly elm and apple, the stems of which are 

 injured by the egg-punctures. Oviposition occurs most commonly 

 in early September, at Ithaca, N. Y. The eggs hatch early in the 

 following May. The young nymphs leave the trees on which the 

 eggs were deposited and migrate to succulent weeds. The early life 

 of the adult is spent on the weeds ; but later the females migrate to 

 trees for egg-laying. 



The two-homed tree-hopper, Ceresa dicer os.- — This species re- 

 sembles the buffalo tree-hopper in size and form. It is a pale dirty 

 yellow, spotted with brown; the lateral and caudal aspect of each 

 horn is brown; the caudal tip of the prothorax, and a large spot 

 midway between the tip and the horns, are also brown. The insect is 

 densely clothed with hairs. It is common on black elder, Sambucus 

 canadensis. Funkhouser followed the life-history from the egg to the 

 adult on this plant. The eggs are laid about the middle of August 

 in the second-year stems, and hatch about the middle of May. 



The two-marked tree-hopper, Enchendpa binotdta.- — In this spe- 

 cies the pronotum is prolonged in an upward- and forward- projecting 

 horn (Fig. 471). This insect is very abundant on trees, 

 shrubs, and vines. It is gregarious, and both adult and 

 immature forms are found clustered together. The 

 eggs are usually laid in frothy masses, which are very 

 white and appear like wax. Funkhouser states that 

 a variety of this species found on butternut lays its eggs 

 in the buds and does not cover them with the heavy 

 froth. The specific name of this species refers to the 

 fact there are two yellow spots on the dorsal line of the pronotum. 

 Another very common species, and one that is closely allied to the 

 preceding, is Campylenchia Idtipes. This is brownish, 

 unspotted, and has a rather longer horn than that 

 of the two-marked tree-hopper; but it varies much 

 in color and in the length of the pronotal horn. This 

 is a grass-inhabiting species and is common in pastures 

 and especially on alfalfa. It is often taken by sweeping. 

 Telamona. — To this genus belong our humpback 



Fig. 471.— £w- 

 chenopa bi- 

 notata. 



Fig. 472. — Tel- 

 amona. 



