110 PRELIMINARY LIST 



with white and pale orange on anterior and lateral margins; scutellum orang'e with 

 whitish mottling; elytra subhyaline, smoUy at base across median portion, a»d at tip, 

 forming three broad indistinct trans verse bands, clavus and corium posteriorly, each 

 with a pale orangf" stripe, veins whitish apically; last ventral segment almost entirely 

 whitish, pygofers rufous below; legs sordid white. 

 Length :{ mm. Described from one female. 



In mountains south-west of North Park, July 10th, on 

 Artemisia tridentata (Baker). 



Although we would think it unadvisable, as a rule, to 

 describe Typhlocybidae from single specimens, we have con- 

 cluded to do so with a few well marked uniques that we 

 took the past season. 

 J5/npoasca pura Stal. Det. Gillette. 



Fort Collins, June 24th, and September 27th on Clematis 

 ligusticifolia; Manitou, September 29th, on oak (Gillette). 



Our specimens referred to this species may prove to be 

 new as we have not seen types. Our specimens answer to 

 the description of pura. 

 ^mpoasca ( Kybos ) smaragdula Fall. Det. Gillette. 



Colorado (VanDuzee, 4). 



Spring Canon, eight miles south-west of Fort Collins, June 

 80th to July 12th; The Rustic, Larimer County, August 11th 

 (Gillette,. Steamboat Springs, July 15th on willow (Baker). 

 -Cheyenne Canon, Colorado Springs, July (Tucker). 



'The genus Kybos must fall under the older name 

 Empoasca. Specimens of K. smaragdulus received through 

 Mr. VanDuzee from France (Letliierry) show a typical 

 Empoasca wing and elytron and we can find no generic 

 characters to separate it from that genus. 



J^wpoasca typhlocyhoides n. sp. 



Male: Clypeus subacute at apex, one-fifth longer than broad, basal suture straight ; 



lorae one-half as wide and two-thirds hs long as clypeus; genae narrow, not attaining tip 



of clypeus, furrow shallow, outer margin slightly concave over coxae, slightly convex 

 along lorae; front one-fourth longer than broad, nearly 

 twice the length of clypeus, superior angle broadly 

 rounded. Face and vertex nearly smooth. Length of ver- 

 tex at middle nearly once and a half that next the eyes. 

 Pronotum slightly less than twice as broad as long, pos- 

 terior two-thirds minutely transversely rugose, front 

 margin broadly rounded, hind margin concave, posterior 



angles broadly rounded. Scutellum broader than long, transverse groove straight. 



Color pale bluish or yellowish green; face and vertex pale yellow: pronotum pale yellow 



