388 AliNUAL BEPORT OF NEW-YORK 



I 



GRAPR. STALKS. 



specimens sent me by Dr. Signoret of Paris, to be the same with 

 the European scale insect of the vine. See Kollar's Treatise, p. 

 155. 



1)7. Four-spotted SPITTLE INSECT, ^AropAora 4-nofafa, Say. (Homoptera. 

 Cercopidae.) 



A spot of white froth resembling spittle, appearing upon the 

 bark in June, containing under it a pale wingless insect which 

 punctures the bark and sucks its juices, as does also the perfect 

 or winged insect which occurs upon the vines the beginning of 

 July, and is a flattened tree-hopper of a brown color, its wing 

 covers having a blackish spot at the tip, another on the middle of 

 the outer margin and a third at the base, with the spaces between 

 these spots hyaline white. Length 0.30. 



9§. Signoret's spittle insect, Aphrophora Signoretii, new species. 



In habits and appearance like the preceding, but without any 

 black spots or marks, its ground color being tawny brovm with 

 dull w^hitish clouds, and thickly punctured with black, the wing 

 covers having a small white spot on their inner margin near the 

 tip and a larger one opposite this on the outer margin. Length 

 0.32. 



This species has a whitish stripe between two blackish streaks along the 

 middle of the head, but no distinct raised line either here or upon the front. 

 Still, that it pertains to this genus, rather than to Ptyelas, is shown by its 

 ocelli or eyelets, which are placed nearer to each other than to the eyes, and by 

 the base of its head, which is angularly notched in the middle instead of being 

 rounded in a regular curve, as we find it to be in both Ptyelus and Lepyronia. 

 I regard these as the most valid characters by which to discriminate these 

 closely related genera. Another spittle insect which I discovered common 

 upon the pitch pines on the sand plains of Saratoga, and described in my Cata- 

 logue of Homopterous insects in the State Cabinet of Natural History, under 

 the name of Lepyronia Saratogensis, was the same year described by Mr. 

 Walker, (List of the British ^luseum, p. 714,) under the name Ptyelus gelidus, 

 his description having issued from the press a few months subsequent to mine. 

 Mr. Walker has, accordingly, in the supplement to his list, (page 1153), done 

 me the justice of giving precedence to my name. I think, however, that both 

 this species and the parallela of Say must be carried back to the genus jiphro- 

 phora, since the nearness of their ocelli removes them from Ptyelus, whilst the 

 length and narrowness of their wing covers separates them from Lepyronia, 



