April, 1902.] North American Species of Athysanus. 235 



extending beyond the pygofers the length of the ultimate segment ; male 

 valve equilaterally triangular ; plates very narrow, long, acutely triangular, 

 about three times the length of the valve, their apices divergent, clothed 

 with stout hairs. 



Habitat: Abuudaut everywhere from Md., Ohio, la., Colo, 

 and Ariz, south to the West Indies and Mexico. The most abund- 

 ant species of the genus throughout the southern states. 



ATHYSANUS STRIOLUS, FALLEN. 



Cicada sh io!a Fall. Acta, Holm, XXVII p. 3f, iSo6. 



AlhvsaHiis sh iola Van. I). Can. Etit. XXI p. ii, 1889; Catalog p. 303 {Limotettix.) 



Athysanus itiiola O.sb. and Ball, Dav. Acad. N. S. VII, p. 91 ; pi. V fig. 4, 1S98. 



Long and narrow, tapering posteriorly, resembling in form the genus Idio- 

 cenis ; eyes wider than pronotum. Variable in size, usually smaller than 

 parallelus which it closely resembles. Greenish with transverse black stripes 

 on vertex and face. Length 9 4-5mm, $ 3.5-4mm ; width i.25nnn. 



Vertex slightl}- longer on middle than against eye, twice wider than long, 

 over half the length of the pronotum, rounding to the broad front ; profile a 

 trifle angled before the ocelli, other structures as in parallelus. 



Color : pale green, vertex with a transverse black stripe as in parallelus 

 but narrower, leaving a broader green stripe both behind and in front and 

 strictly transverse, not parallel with margins. Face with the black sutures, 

 arcs and the cordate upper margin of front, as in parallelus, very variable in 

 breadth and intensity. Pronotum and elytra pale green. 



Genitalia : female segment half longer than the penultimate, the entire 

 posterior margin shallowly, roundingly, emarginate ; pygofers rather long, 

 equaling the black ovipositor. Male valve broad, obtusely angular, plates 

 about three times as long as the valve, triangular, their apices slightly 

 divergent, much narrower than parallelus. 



Habitat: (Europe) Ontario, N. Y., 111., Iowa, Colo, and Van- 

 couver's Isd. Doubtless will be found throughout the northern 

 half of the United States and well up into Canada. 



ATHYSANUS PARALLELUS VAN DUZEE. 

 Aihvsanus paiallclns Van D. Can. Ent. XXIII, p. 169 ; Cat. p. 303 {Lixiotettix.) 



Closely resembling striolus but larger and with a broader, shorter head. 

 Pale green with a transverse band on vertex, facial sutures and arcs on front, 

 black. Length, 6mm ; width, i.jsnnn. 



Head with eyes wider than the pronotum ; vertex strictly parallel-mar- 

 gined, two and one-half times wider than long, a trifle over half the length 

 of the pronotum, roundingly confused with the almost flat face ; front broader 

 than long, much broader than the clypeus at apex. Elytra long and narrow 

 with a distinct appendix ; venation typical Athj'sanoid pattern, apical cells 

 long, curved. 



Color : vertex pale yellow or greenish, a transverse black band just back 

 of the ocelli, nearly as wide as the space behind it ; face with the sutures, a 

 line on the clypeus and the arcs on the front, black. The upper margin of 



