No. 34.] HEMIPTERA OF CONNECTICUT: MEMBRACIDAE. 171 



The following pages include the species which are believed to 

 be represented in the Conecticut fauna. In the preparation of 

 this paper it is presumed that if a species is common throughout 

 the New England States it will be found in Connecticut ; certainly 

 if it is known to be abundant in eastern New York and in Massa- 

 chusetts it may be reasonably supposed to occur in Connecticut 

 and is here included. This list does not include, however, a 

 number of species which have been reported from Long Island, 

 since although geographically close to Connecticut, the Long 

 Island region seems to represent a rather distinct faunal area, 

 extending westward and southward but not northward. 



The writer is greatly indebted to Dr. W. E. Britton, State Ento- 

 mologist, for records and material from the State, and to Mr. 

 Lewis B. Woodruff of New York City whose careful collecting 

 in the neighborhood of Litchfield has added many records to the 

 State list and whose kind assistance in the matter of locality and 

 host records has been most valuable in bringing this paper up to 

 date. 



Classification. 



The Membracidae are usually divided into five subfamilies ot 

 which only three are represented in northeastern United States. 

 These three may be separated as follows : 



Key to Subfamilies. 



1. Scutellum wanting or concealed by the pronotum 2 



Scutellum distinct Centrotinae 



2. Anterior tibiae f oliaceous Membracinae 



Anterior tibiae simple Smiliinae 



Very few species of the subfamily Centrotinae are found out- 

 side of the tropics and of these but one species occurs in the New 

 England States. The Membracinae are slightly better represented 

 in temperate regions but only two species are found in Connecticut. 

 All the rest of the forms here discussed are representatives of the 

 great subfamily Smiliinae which is the dominant membracid 

 group in this country. 



Key to Genera. 



1. Scutellum distinct 



a. Posterior end of scutellum visible Microcentrus, p. 172 



b. Scutellum visible only at sides Gargara, p. 172 



Scutellum wanting or concealed 2 



2. Anterior tibiae f oliaceous 3 



Anterior tibiae simple • 4 



3. Anterior ridges of pronotal horn close to superior margin of horn ; 



inferior carina of horn not f oliaceous Campylenchia, p. 173 



Anterior ridges of pronotal horn in center of horn; superior and 

 inferior carinae of horn f oliaceous Enchenopa, p. 174 



4. Tegmina entirely free, not covered by pronotum 5 



Tegmina partly or entirely covered by pronotum 8 



5. Veins of corium closely united at base 6 



Veins of corium widely separated at base 7 



