ART. 19 PLANT AND INSECT FOSSILS COCKERELL 11 



EOLIARUS QUADRISTICTUS, new species 



Plate 2, fig. 1 



Length about 8 mm., width of abdomen near base 3.5 mm. ; length 

 of tegmen 9 mm., distance between stigmal and apical spots 2 mm ; 

 wings hyaline with brown (not spotted) veins; four conspicuous 

 s]3ots, the large irregularly quadrate stigmal one, the smaller apical 

 one, ? small one near lower side of wing directly below stigma and 

 another subapically in the region of the end of the cubitus. The 

 venation differs to some extent on the two sides of the type. On the 

 riglit side the uj)per branch of the media forks very near to the 

 cross-vein, while on the left it forks at a distance a little greatei 

 than the length of the cross-vein. 



Green Eiver Eocene, Trail Gulch, on north side of Eoan Creek, 

 Colorado (John P. Byram, 1922). 



Uolotype.—C2it. No. 69615, U.S.N.M. 



Oliarus {?) lutensis Scudder, from Green River, Wyoming, is 

 clearly congeneric and must be called EoUarus lutensis. Possibly 

 the two forms belong to a single species, but in lutensis the fork 

 of the upper branch of media is very much more distant, the tegmina 

 do not appear to be distinctly four-spotted, and the insect is con- 

 siderably smaller. I should nevertheless have hesitated to propose 

 a second species were it not that in the modern genus Oliarus there 

 are very numerous species, differing by similarly inconspicuous or 

 relatively unimportant details. This insect gives us another ex- 

 ample of spotting which is older than the finer details of structure. 



Family CICADELLIDAE 



THAMNOTETTIX PACKARDI, new species 



Plate 2, fig. 4 



Length 4 mm.; length of tegmina 4 mm.; their width about 1.4 

 mm. ; width of thorax about 1 mm. or slightly more. Head and body 

 dark, with scutellar region pale ; tegmina slender, with longitudinal 

 light and dark stripes. There is a dark line along the costa, per- 

 ceptibly broadening basally; below the costa, nearly to the end of 

 the wing, is a broad continuous pale band emitting a pointed lobe, 

 directed apicad, from its basal third beneath; beyond this pointed 

 lobe, separated from it by an oblique dark band, is an elongate pale 

 mark but the apical part of the wing is dark; a broad light band 

 covering the upper margin of the clavus, and a narrow curved light 

 band in the extreme anal region. Hind wings strongly dusky; no 

 visible marginal vein. 



