HEMIPTERA IIOMOPTERA CERCOPID.K. 319 



forks, when, after reaching their widest, the t\vi> forks run exactlv parallel 

 to the costal margin, failing in tlu: darker outer tliinl oi' tin- wing; the 

 branches of the nlnar vein originate as in the last species, and are parallel 

 to the radial branches, all being also equidistant. 



Length of tegmina, !>' 



s Green River, Wyoming. < me specimen, Xos. IK) and 125, Dr. A. S. 



Packard. 



3. CERCOPIS SKFFOCATA. 



PI. 10, Fij,'s. 2, 3. 



A single one of the tegmina of an insect with the < lavus gone, but very 

 different in its markings from anything known. Its simple neuration allies 

 it directly with the other species referred here: the radial, however, is dis- 

 tant throughout from the margin. The costal margin is very regularly and 

 considerably convex, and the apex very strongly rounded, produced, and 

 almost pointed. A broad and uniform belt of dark color follows the costal 

 margin at the base for nearlv two-tilths its course, in striking contrast to 

 the generally pale color of the wing, and distally joins a similar transverse 

 and slightly obliipie bar crossing the wing as tar as the sutura clavi : all the 

 base of the wing, dark or light, is finelv and distantly punctuate, as shown 

 in Fig. 2; a second transverse and similarly oblique dark hand, slightly 

 broader, crosses the wing just before the apex, its inner border just striking 

 the tip of the sutura clavi. 



Length of tegmina, 8.5"""; breadth at tip of sutura clavi, 3 mm . 



Florissant. < hie specimen, No. 262. 



I'KTI.'OLYSTRA Scudder (irtrpo?, Lystra, nom. gen.). 



Petrolyalra >r.nlcl., Hull. U. S. Gcol. Coo^r. Surv. T.-ir., IV. 53C 31 1-78). 



One of the most striking instances of tropical allinities in the Tertiary 

 shales of Florissant is found in the presence of two species of a genit^ of 



h n ire 11 optera, rivaling the famous lantern-fly of South America in si/.e. 



but differing in neuration and other features from .-my i^'uus hitherto de- 

 scribed. At first glance one would think that it belonged to the Fulgorida, 

 a subfamily \\liich, with Stridulantia, includes most of the larger lbrm> o|' 

 the suborder, and to be somewhat nearlv allied to I'aralvstra ; but it ililiers 

 from this, and, so far ;is I can determine, from all Fulgorina. in the minute- 



