60 STUDIES IN NORTH AMERICAN MEMBRACID/E 



and elongated more as in univittatus but it is subtriangular in 

 form rather than lignlate. 



Genus Heliria Stal. 



This genus is intermediate between Glossonotus and Tel- 

 amona. It has a broader crest than the former with the ante 

 rior one half abruptly elevated above the posterior. After a 

 careful study of all the forms accessible to me I have decided to 

 exclude from this genus the intermediate forms in which the 

 dorsal crest shows merely an angle on its posterior declivity, 

 indicating the elevation of the anterior foliole and the almost 

 complete elimination of the posterior. Hardly one step farther 

 would take us to Telamona pyramidata, a species distinctly 

 intermediate between Telamona and Glossonotus. I have there- 

 fore placed them in Telamona reserving Heliria for those 

 species in which the crest has the peculiar step-like form 

 described by Stal. 



I have found it impossible to correlate Goding's description 

 of Heliria Strombergi with his reference to a figure given by 

 Walker in his British Museum Catalogue, and have thought it 

 best to pass this species as unknown as I have had to do in the 

 case of Heliria anoflava Buckton. The latter species probably 

 does not pertain to this genus and ma}^ not inhabit North 

 America at all. It is doubtful if it can be recognized when 

 rediscovered. Our two species may be distinguished as follows : 



Larger, 1 2-1 3mm., grey or brownish grey ; posterior foliole of 

 the crest little elevated above the dorsal line anteriorly, 

 its hind angle subacute ; humeral angles greatly produced, 



1, cristata Fairm. 



Smaller, 8 mm , darker brown; posterior foliole of the crest, 

 when well differentiated, elevated for at least its own 

 width above the dorsal line, • 2, scalar is Fairm. 



1. Heliria cristata Fairmaire. 



This large striking species, the type of its genus, has been 

 taken by Mr. W. T. Davis at Lakehurst, N. J., and the Cornell 

 University collection has an example from North Carolina. 

 These are the only specimens I have yet seen. It is the Tel- 

 amona acclivata of Emmons. 



