392 Illinois State Lahoratorij of Natural History. 



ness and numberless favors; to Mr. W. H. Ashmead for mate- 

 rial; to Prof. Herbert Osborn for identification of specimens; 

 to Mr. E. P. Van Duzee, of Buffalo, N. Y., for many sugges- 

 tions and a review of the manuscript, which he improved by 

 the addition of important references and the making of some 

 needed changes; to Mr. C. W. Stromberg and Mr. 0. S. West- 

 cott for many valuable examples of Illinois species; and to 

 Miss Emma Bird for the greater part of the clerical work of 

 preparing the catalogue for publication. 



The Membracidae are distinguished as follows by Comstock 

 in his tables of the families of Homoptera:* "Beak evidently 

 arising from the mentura; tarsi three-jointed; auteunffi minute, 

 setiform. Ocelli only two in number or wanting; males with- 

 out musical organs. Antenna? inserted in front of and be- 

 tween the eyes. Prothorax prolonged into a horn or point 

 above the abdomen." 



For the convenience of those who may not have access to 

 the work I will give Stdl's synoptic table of the subfamilies of 

 Membracidae as published by him in Hemiptcra Africana, IV., 

 pp. 82 and 83: 



Scutellum wanting or obsolete, not extended beyond metanotum. 



Posterior tarsi small, [much] shorter than anterior 



HorLoriioRiN-K. 



Tarsi of [nearly] equal length, or posterior longer than anterior. 



Tibiae and sides of face dilated, foliaceous Membuacin.i:. 



Tibia' simple. 



Tegmina entirely membranaceous ; vehis distinct. 



Third apical cell elongate, never petiolate. .Daknin.k. 

 Third apical cell subtriangular, petiolate, adjacent 



cells contiguous Smiliin.i:. 



Tegmina coriaceous and opaque externally, with sciarceiy 



distinguishable veins in this portion . . . TnAGorix.i;. 



Scutellum distinct, i)roduced beyond metanotum Ckxtkotin.k. 



A synopsis of the genera found in North America ap- 

 peared in Trans. Am. Ent. Soc, Vol. XIX., pp. 253-2()t). 



*lntroduction to Entomology, p. 134. 



