Oct.,igj7 Bulletin of the Brooklyn Entomological Society 79 



5 specimens taken on linden. It is the form which has gone for 

 many years under the ms. name adusta Uhler, and is abundant 

 on mulberry in the region about Washington, D. C. Uhler's 

 name means " scorched," almost an opposite conception to that 

 implied by the name now cited. The term pallida seems inept 

 for a species distinguished by the clear brownish color of all the 

 thicker membranous parts. 



Corythucha pruni Osborn and Drake. Corythucha pruni O. 



6 D., op. cit., pp. 231-232. The ms. name cerasi was used for 

 this form by Uhler and Heidemann. 



Corythucha bulbosa Osborn and Drake. Corythucha bulbosa 

 O. & D., op cit., pp. 232-233. The food plant of this species, 

 so long known under the highly appropriate ms. name carhonata 

 Uhler, is Staphylea trifolia. The species is usually abundant. 



Gargaphia angulata Heidemann. The most common food 

 plant of this species does not seem to have been recorded. It 

 is Ceanothus americanus. 



Gargaphia amorphae Walsh. Tingis amorphcE Walsh, Benj. 

 D. On Phytophagic varieties and Phytophagic species. Proc. 

 Ent. Soc, Phila., 3, 1864, p. 409. 



This species is omitted from the recent Key to the Nearctic 

 Species by Drake. (Drake, Carl J., Key to the Nearctic Species 

 of Gargaphia with the Description of a New Species (Hem. 

 Heter.). Ent. News, 28, No. 5, May, 1917, pp. 227-8.) 



It runs to the section with broad costal area having 4 or more 

 rows of areolae at the widest part. In this group, G. angulata 

 Heid. can be separated by absence of spines from back of vertex 

 along inner orbits, and probably the genus should be primarily 

 divided on this character. G. solani Heid. has the paranota wider 

 and more angulate than either tiliae or amorphae, and the hood 

 conspicuously higher. than median carina. G. amorphae in some 

 ways is intermediate between solani and tiliae. The hood is 

 higher than median carina, but not so much as in solani, and in 

 agreement with that species the apical angle of the discoidal area 

 is at the outer side. In tilios the hood is lower than the median 

 carina and the apical angle of discoidal area is about median. 

 Counting the maximum number of rows of areoles in the para- 

 nanota and discoidal areas, these three species have respectively : 

 tilicE, 4, 7 ; solani, 5, 5 ; and amorphce 3 and 5. 



