1917] The Cicadellidce of Wisconsin 89 



Genitalia: Female last ventral segment twice the preceding in 

 length; lateral angles produced and sharply rounded to an arcuate 

 posterior margin incised at middle, forming two produced broadly 

 rounded lobes, margined by a large semicircular brown spot extending 

 half way to the base. Male valve almost equaling last ventral segment 

 in length, slightly concave to an obtuse point. Plates long, evenly 

 narrowed to small blunt points; each outer margin with a few stout 

 bristles. 



One female and two males, Grand Rapids, August 21, 1916. 



2228. Ph. irroratus (Say) — Common. 



2230. Ph. collitus Ball.— Amery and Tomah, Aug. 1.3, 1916. 

 2234. Ph. lobatus Osb.— Grand Rapids, Aug. 21, 1916; Taylors Falls, 

 Aug. 16, 1916. 



2236. Ph. apertus VD.— Two specimens, Trout Lake, Aug. 6, 1913; 



Pembine, Sept. 4, 1916. 



2237. Ph. fulvidorsum (Fh.)— One spec, St. Croix Falls, Aug. 15, 1916. 

 2246. Ph. solidaginis (Walk.) — Common in western central areas. 



Phelpsius bifidus n. sp. 



(Figs. 7, 8, 9, 10). 



Resembling P. solidaginis in general appearance, but smaller 

 and with distinct genitalia. Length 6-6.5 mm. 



Vertex sharp margined, slightly produced and upturned; disc 

 concave, almost twice as long on middle as next the eye; width between 

 the eyes two and one half times the length. Pronotum almost twice 

 as long as vertex, humeral angles well rounded, disc with coarse 

 punctures. Elytra broad, well rounded and flaring at the tips. Face 

 almost as broad as long; front concave below margin, strongly narrowed 

 from antennal pits to clypeus. 



Color: Vertex pale, rather heavily irrorate with brown; a spot 

 on upturned apex and one near each eye at either side of base, pale. 

 Narrow anterior margin of pronotum pale, posteriorly dark with light 

 punctures. Elytra milky white, sparsely irrorate except on discal 

 cell and apex. of clavus. Veins, a dark spot on base of inner apical 

 cell and four spots on costa, each one at termination of apical costal 

 veins, brown. Face heavily irrorate with brown above, causing it to 

 appear dark in color. Below showing traces of a median line and 

 five pairs of pale arcs. Beneath dark brown, differing greatly from 

 other species. 



Genitalia: Female last ventral segment twice as long as preceding, 

 strongly produced, angularly rounded to a deep "V" shaped incision, 

 extending more than half way to base. Incision margined with brown. 

 Male valve as long as preceding segment, obtusely triangular, plates 

 three times as long as valve, broad and convex at base, then narrowing 

 concavely to blunt points. Margins only beset with short heavy 

 bristles and marked with black points. 



