108 STUDIES IN NORTH AMERICAN MEMBRACIDJE 



Subfamily Darnida Stal. 



Of this southern group I find three genera and six species 

 recorded as inhabiting the United States. Hemiptycha longi- 

 cornis Fairmaire was accredited by its describer to "N. Am." 

 but this is almost certainly an error and should have been Bra- 

 zil as stated by Stal. Aconoplwra lineosa Walker is probably 

 a Platycotis. It is very doubtful if Aconophora occurs at all 

 within our territory. If found it will doubtless be from near 

 the Mexican border. Our other genera may be distinguished 

 as follows: 



Head triangular; hardly shorter than the width between the 

 eyes, 3, Hyphens Stal. 



Head short, truncated, much broader between the eyes than 

 long, 1. 



1. Elytra with three nervures at base; at least one half ex- 

 posed below the margin of the pronotum, 



1, Dam is Fabr. 



-. Elytra with two nervures at base, forked at about their 



middle; about one third of the elytra exposed below the 



sides of the pronotum, 2, Stictopelta Stal. 



Darnis lateralis Fabr. has been reported from California, 



Dr. Goding has described three species of Stictopelta from 



Arizona and New Mexico and two species of Hyphens are 



known from Florida. 



Subfamily Hoplophorida Stal. 



Of this subfamily three genera and eight species have been 

 recognized from our territory. The three genera may be dis- 

 tinguished as follows: 



Posterior process of the pronotum attaining the apex of the 

 elytra or at least much exceeding the tip of the abdomen, 



1, Umbonia Burm. 



Posterior process of the pronotum scarcely if at all exceeding 



the tip of the abdomen, 1. 



1. Pronotum unarmed or armed before with a more or less 



porrect horn between the humeri, 2, Platycotis Stal. 



Pronotum rounded before, behind the humeri armed with 



horn or rounded process, 3, Lophopelta Stal. 



