HEMIPTEBA HOMOPTEBA FULGORINA. 283 



1. LYSTRA? RICHARDSOM. 



PI. 0, Fis. IM, :;n, :;i ; i'l. 7, Fi-s. 1, :;. 



Lyitrat richardsoni S.-nd.l., Hull. 1'. S. Gcol. Geogr. Surv. T.-rr., IV, 772 (1878). 



I have before me a number of specimens of a large fulgorid, appar- 

 ently belonging near Lystra and Pceocera, but which have been pres.-rved 

 only in a fragmentary condition. Enough, however, remains t<> .-1">\\ 

 several features : the vertex between the eyes is half as broad again as tin- 

 eyes, and at least as long as broad, projecting beyond the eyes by more 

 than the diameter of the latter and well rounded. The scutellum is large, 

 fully as long as broad. The longitudinal veins of the tegmina are rather 

 infrequent, forking rarely, and even toward the apex seldom connected by 

 cross-veins; apparently all the principal veins branch at about the same 

 points, viz, near the middle of the basal and of the apical half; the tegmina 

 somewhat surpass the abdomen. The body is broadest at the second or 

 third abdominal segment, and tapers rapidly to a point, the segments being 

 equal in length. 



Length of body, lG mm ; probable length of tegmina, 15.5 mm ; breadth 

 of abdomen, 5.5 mm . 



Named for one of the earliest collectors of Green River fossil insects, 

 Mr. F. C. A. Kichardson. 



Green River. Wyoming. Eleven specimens. \os. (J7, ll!i (F ( '. A. 

 Richardson), 40, 41, 109 (L. A. Lee), l-'l, 1-M i A. S. 1'ackard), 4076, 4:M7 

 and 4208, 4212, 4217 (S. H. Scudder). 



2. LYSTRA ? LKEI. 

 Pi. 7. Fi-;. ii. 



A species is indicated of about the same si/e and general form as L. 

 richardsoni, preserved so as to show a dorsal view with the greater part of 

 at least one of the diaphanous tegmina and the thorax, but not the head nor 

 Other appendages. The mesonotum was broad and well rounded in front, 

 contracted behind, nearly twice as broad as long, with the interior third of 

 each lateral half separated by a straight oblique sulcus from the parts with- 

 out, as deep as the median sulcus, and apically curving abruptly inward to 

 it; scutellum moderately large, truncate hasally, triangular and almost 

 equiangular, the apex produced finely to a point, the sides slightly concave. 



