OSBORN AND BALL — REVIEW N. A. SPECIES OF IDIOCERUS. 131 



Idiocerus monilifer^ O. & B. (Plate III., Fig. 2.) 



Idiocerus inoniliferce O^hoxn & Ball. Proc, Davenport Acad. Nat Sci., 

 Vol. VII., p. 71 (Jan., 1898). 



Idiocerus tnonilif era Osborn. Proc, la. Acad. Sci., Vol. V., p. 233. 



Broader than alternatus, brownish with light markings, face with a 

 broad dark band, cross nervure of elytra white. Length, 5 50 mm.; 

 width, 2 mm. 



Face yellowish, a broad transverse black band between the ocelli 

 and the spots on the vertex, this band produced downward against 

 the eyes and sending a slender line towards the antennal pits. Front 

 very broad, rounding away from the antennae, a brownish band either 

 side just inside the margin, arching across just below the antennal pits. 

 Pronotum irrorate with fuscous except on a median line. Elytra sub- 

 hyaline with the nervures alternately dark and light The bases of 

 all the nervures light, the cross nervure between the sectors broadly 

 light. Ultimate ventral segment of female broadly rounding and 

 shallowly notched in the middle, male plates very broad and short, 

 antennae without discs. 



Found on cottonwood at Ames, Iowa. 



Idiocerus alternatus Fitch. (Plate III., Fig. i.) 



Idiocerus alternatus Fitch. Homop. N. Y. State Cab., p. 59, 185 1. 



Bythoscopus alternatus Walk. Homop., III., p. 876, 185 1. 



Idiocerus alternatus \' . D. Can. Ent., XXI., p. 8, 1889. Psyche, V., p. 

 388. Provancher, Pet. Fauna Ent. Can., Ill, p. 293. Harrington, Ottawa 

 Nat., VI., p. 31. Osborn, Proc. la. Acad. Sci, I., pt. II., p. 126. Cockerell, 

 Trans. Am. Ent. Soc, XX, p. 365 ; G. & B., Hemip. Colo., p. 73, 1895. 



Idiocerus intemiptus G. ^: B. Hemipt. Colo., p. 74, 1895. 



Brownish fuscous alternating with white on pronotum and elytra. 

 Face yellowish, usually a fuscous arc outside the two black spots. 

 Length, 9 5.25 mm.; c?, 5 mm.; width, 1.5 mm. 



Face yellowish, irregularly mottled in the female, four stripes on the 

 lower part in the male, usually a brownish crescent outside the round 

 spots on vertex. Pronotum brownish, a light stripe on the middle 

 extending on to the vertex and back across the scutellum : scutellum 

 with the broad basal angles and two spots on the disc separated by a 

 bifid brownish line, black. Elytra sub-hyaline, the nervures fuscous 

 interrupted with white, the second sector with several short interrup- 



