MORGAN HEBARD 187 



The presence of a species of Dendrotettix in the Cascade 

 Mountains of the Northwest comes as a great surprise, the genus 

 not having been found previously west of southeastern Kansas 

 and east-central Texas, or north of the former and northeastern 

 Illinois. Nearest known related form in the Northwest is an 

 isolated species of Zubovskya Dovnar-Zapolskij, present in the 

 mountains of central-western Oregon. 



Generally strongly suggesting Dendrotettix zimmermanni 

 (Saussure), the present insect is easily separated by the less 

 enlarged head with eyes less prominent and vertex slightly more 

 produced, tegmina (though very similar in other respects) with 

 humeral vein irregularly and poorly indicated proximad and not 

 close to the prominent discoidal vein but the mediastine vein 

 very conspicuous, the cross-veinlets heavier and more numerous, 

 distal margin of ultimate tergite acute, coloration more uni- 

 formly dark with paler markings much more obscured, deep pink 

 ventral surface of the caudal femora and yellow buff caudal 

 tibiae. 



The presence of a prominent and percurrent mediastine vein 

 on the tegmina and rich coloration of the ventral portions of the 

 caudal femora suggest instead the otherwise very much more 

 widely separated Dendrotettix quercus (Packard). 



The insect differs from Appalachia hebardi Rehn and Rehn 

 much as it does from zimmermanni, but it differs still further 

 in having the pronotal lateral lobes deeper, the tegmina broader 

 with their disto-dorsal margin not regularly curved and the 

 ovipositor valves much deeper with dorsal margins of dorsal 

 pair much more strongly sigmoid. The caudal tibiae are, how- 

 ever, much the same color in these species and the ultimate 

 sternite is acute-produced distad (this eliminating that char- 

 acter as of value in distinguishing Appalachia from Dendrottetix). 



Type. — $ ; Alder Springs below and west of McKenzie Pass, 

 Cascade Mountains, Lane County, Oregon. Elevation 3700 feet. 

 August 24, 1928. (M. Hebard). [Hebard Collection, Type No. 

 1300]. 



Size medium, form robust. Head not proportionately as large nor eyes 

 as protruding as is normal in this genus, more nearly normal for the 

 Melanopli as in the genus Zubovskya but with interocular space broader. 

 Interocular space broad, equalling the greatest dorsal ocular width, 



TRANS. AM. ENT. SOC., LXU. 



