HEMIPTERA. 87 
MEMBRACIDZA, 
Srin, C.—Bidrag till Membracidernas Kiinnedom. <Ofvers. K. 
Vet.-Akad. Forh., 1869, pp. 231-300. 
Gopine, F. W.—Bibliographical and synonymical catalogue of the 
described Membracide of North America. <Bul. Il St. Lab. 
Nat. Hist., 11, pp. 391-482, 1894. 
A synopsis of the subfamilies and genera of the Membracide 
of North America. <Trans. Amer. Ent. Soc., xix, pp. 253-260, 
1892. 
Van Duzer, E. P.—Studies in North American Membracide. <Bul. 
Buffalo Soc. Nat. Sci., 1x, pp. 29-129, 1908. 
Tables to genera and most of species, 
PSYLLIDZ. 
Low, F.—Zur Systematik der Psylloden. < Verh. k. k. zool.-bot. Ges. 
Wien, 1878, pp. 585-610. 
Characteristics and tables of the European subfamilies and genera. 
Supersedes all previous classifications. 
Asumerap, W. H.—On the Aphidide of Florida, with descriptions of 
new species. Family Psyllide. <Can. Ent., xi, pp. 220-225, 
1881. 
Gives a list of the North American species, with descriptions of several 
new ones. 
Riry, C. V.—Notes on North American Psyllide. <Proc. Biol. 
Soc. Wash., 11, pp. 67-79, 1884. 
A list of the North American Psyllidze and descriptions of new genera 
and species. 
Matiy, C. W.—Psyllide found at Ames. <Proc. Iowa Acad. Sci., 
i, pp. 152-171, pls. 3, 1894. 
A list of the described species, with a few additions. 
APHIDIDZ. 
Watsu, B. D.—On the genera of Aphide found in the United States. 
<Proc. Ent. Soc. Phila., 1, pp. 294-310, 1861-1863. 
Tuomas, C.—Notes on the plant-lice found in the United States. 
<Trans. Ill. Hort. Soc., 1877, pp. 137-212. 
A review of the family, including the Psyllide; reproduces the descrip- 
tions of earlier authors, and adds descriptions of new species. 
A list of the species of the tribe Aphidini, family Aphide, 
found in the United States, which have been heretofore named, 
with descriptions of some new species. <Bul. 2, Ill. State Lab. 
Nat. Hist., 1878, pp. 3-16. 
