l82 ENTOMOLOGICAL NEWS [ July, 'iQ 



Smcrubra is nearest to P. cotvora Hew., from which it is 

 very different. 



Described from 7 specimens from Cavinas, Bolivia. Type 

 The Academy of Natural Sciences of Philadelphia. Paratypes 

 Collection Mengel. 



EXPLANATION OF PLATE VIII. 



Figs. 1-2, Pcrisama inconspicua Mengel, Bolivia. (Ent. News, xxvii. 

 p. 423, 1916). 



Figs. 3-4, Pcrisama sinerubra Mengel, Bolivia, n. sp. 



Fig. 5, Catagramma horstii Mengel, U. S. Colombia. ( Ent. News, 

 xxvii, p. 423, 1916). 



Preliminary Key to the Nearctic Species of Eupteryx 



(Homoptera ; Eupterygidae). 

 By W. L. McAxEE, Biological Survey, Washington, D. C. 



For bibliographic references and history of the genus Eup- 

 teryx Curtis, see article by the writer on Genera of the Eup- 

 terygidae, Proceedings of the Biological Society of Washing- 

 ton, Vol. 31, pp. 109-124, Nov. 29, 1918. 



Diagnostic characters in this family : Membrane without ap- 

 pendix ; hind wing without submarginal vein, and with three 

 apical cells. 



After determining that forewing lacks appendix, the easiest 

 method of recognizing Eupteryx is to lift outer apical part of 

 forewing; if the hindwing then exposed has no submarginal 

 vein and the first two sectors are joined by a crossvein, the 

 insect is a Eupteryx. 



Key to the Species. 



A. Fourth apical cell of forewing distinctly 5-sided (in other words, 

 the second sector forms part of the outer horder of the cell) ; three 

 black spats on vertex, three pairs of irregularly oval, brownish, 



ocellate spots on disc of forewings melissae Curtis. 



AA. Fourth apical cell of forewing 4-sided (second sector does not 

 form part of its outer border, no more than tangent to it, and some- 

 times separated by a short stalk) ; coloration otherwise. 



B. Forewings white; vertex, thorax and scutellum mostly black, 



vandusei Gillette. 



BB. Forewings not white ; general color above smoky to blackish 

 sometimes varied with yellow or sanguineous, 



flavoscuta Gillette. 



