AKT. 18 JASSID GENUS TYPHLOCYBA McATEE O 



KEY Ti_> Ti:i; cHMii's OK sri:iii:.s 



For the purposes of this key, the sectors (1-3), the cross veins (1-4), the 

 apical veins (1-3), and the apical cells (1—4), are mimbered in order from 

 the costal to the radial margin of the tegmeu. 



i. Third apical vein continuous . (or nearly so) with third sector, fourth 

 apical cell therefore approximately triangular (fig. 10) Group 3, p 35 



— Third apical vein separated from third sector by a portion of the third 



cross vein, the fourth apical cell therefore distinctly trapezoidal (figs. 



1-9) 2 



2. A dark spot where cross vein 1 and each of the apical veins .joins the 

 margin of the tegmen (fig. 1) ; outer claspers of male distinctly shouldered 

 (fig. 11) Group 1, p. 5 



— Without these dark spots ; outer claspers of male usually gradually narrowed 



from base Group 2, p. 8 



Group 1 



The species of this gToiip examined all have the aedeagus three- 

 branched from base, the outer clasper distinctly shouldered and defi- 

 nitely bristled (fig. 11), and the inner clasper with a tooth below at 

 beginning of the apical curvature (fig. 12) ; the eighth sternite in 

 the females seen is more or less emarginate laterally ; besides the dark 

 spots at intersection of apical veins and wing margins, there are dark 

 clouds between the sectors just anterior to the cross veins. 



KEY TO THE SPECIES OF GROUP 1 



1. Apex of scutellum black, and a spot on middle of anterior margin of pro- 



notum dark ; length 4 mm. or more ; lateral branches of aedeagus dis- 

 tinctly shorter than central one (fig. 15) ulmi Linnaeus p. 5 



— Lacking these dark markings ; length less than 4 mm. ; lateral branches of 



aedeagus nearly as long as, or even longer than, central one 2 



2. Tegmina washed with greenish-yellow; central shaft of aedeagus un- 



branched apically (tig. 16) tenerrima Horrich-Schaeffer, p. 



— Tegmina whitish-hyaline; central shaft of aedeagus with apical processes— 3 



3. Aedeagus with two pairs of lateral appendages, central shaft simply bifid 



apically (figs. 18-19) unca, new species, p. 8 



— Aedeagus with one pair of lateral appendages, central shaft with two pairs of 



apical appendages (fig. 21) piscator, new species, p. 7 



TYPHLOCYBA ULMI Linnaeus 



Cicada ulmi Linnaeus, Carolus, Systema naturae, Regnuni animale. ed. 10, 

 1758 (Engelmann reprint, 1894), p. 439 [SwedenV]. 



Cicada ulmi Linnaeus, Cabolus, Fauna Suecica, sistens Animalia Sueciae 

 Regni, etc., 1761, species 900, p. 243 [Sweden]. 



" Eupfcriix oceJlata Curtis, .John. British Entomology, vol. i4, is;;7. art. 

 640 [p. 2]. [Great Britain.] 



Male. — General color above pale greenish-yeHow, more hyaline 

 near costa, and fumose in apical cells; a spot, sometimes faint, on 



8 Synonj-my of European forms is given on the authority of Oshanin's Verzeichnls. 1907, 

 and liave not been veriflocl i)y Ihe \vrit(>r. 



