216 W. D. FUNKHOUSER 



A very abundant species on trees, shrubs, and vines. Particularly 

 common on butternut, locust, and bittersweet. Seldom found in the 

 grass, in which respect it differs from the preceding species. The forms 

 on the butternut are peculiar in egg-laying habits and in coloration. 

 This species is unique in covering its egg masses with a frothy deposit. 

 It is destructive to certain hosts because of the puncturing of buds and 

 stems in egg-laying. 



This insect shows two very distinct types of life history in the Cayuga 

 Lake Basin. In the usual method the eggs are laid in the stems of the 

 locust or the bittersweet and covered with the characteristic frothy mass 

 (Plate XXIII, 6, 8), which has often been confused in literature with other 

 insect deposits. The eggs winter over, the nymphs appearing early in 

 May and requiring about six weeks for development. The adults usually 

 spend their lives on the host on which the eggs are laid, but occasion- 

 ally they migrate to succulent plants, such as daisy, joe-pye weed, and the 

 like, to feed. They return to the original host during the latter part of 

 August to oviposit. The mature insects are light brown in color, with 

 the males slightly darker than the females. This is apparently the normal 

 life history of the species and has been very completely described by 

 Matausch (1912 a). 



The second type of life history is found on the butternut, on which 

 host the eggs are laid in the buds and are not covered with the heavy 

 froth, and the adults are very different in color. This peculiar life history 

 has been described by the author in an earlier paper (Funkhouser, 

 1915 c). 



There is only one brood a year, but the nymphs are variable in the 

 length of time taken for development and may be found in various stages 

 thruout the greater part of the summer. The species is most abundant 

 in Stations A, B, and L. It should be noted that this species is not attended 

 by ants. 



Technical description. — Much resembling the preceding species in size and in general 

 appearance, but differing in shape of the head, in shape of sculpturing of the pronotal horn, 

 and in bearing two yellow spots on the dorsal line of the pronotum. 



Head longer than broad, uniform brown, finely but densely punctate, sparingly pubescent; 

 eyes prominent, very deep brown; ocelli yellowish, farther from each other than from the 

 eyes; clypeus longer than broad, rounded at tip, not punctate. 



Prothorax finely punctate, sparsely pubescent; two distinct ridges on each side, the upper 

 extending to the lateral margin; pronotal horn strongly curved, broadly foliaceous above, tri- 

 querate at tip; median dorsal carina high and percurrent; two dorsal spots of lemon yellow, 

 the anterior about twice as long as the posterior; posterior process gradually acuminate, 

 extending slightly beyond internal angles of tegmina. 



