Jassidce of Illinois. 19 



A. irrorata Fabr. (PI. IT., Figs. 15-18.) 



Cicada irrorata Fabr., Ent. Syst., IV., p. 33, 24 ; Fabr., Syst. Rhyng. 



p. 62, 6.— Coqueb., lUust. 1, p. 32, tab. 8, fig. 3.— Blanch. 



Hist. Nat. III., p. 192, 17. 

 Tettigonia rufiventris Walk., List Homop., p. 796, 12. 

 Tettigonia irrorata Sign., Ann. Soc. Ent. Fr., Tome 111. (1852), p. 



59, 276. 



Size and general appearance of Oncometopia undata. 

 Color yellowish brown to black, sprinkled with yellowish white. 



Length 12 ram. 



Head. Above nearly black, mottled with yellowish white 

 and tinged in places with rose-red. End of gula, above, rosy. 

 Eyes gray, ocelli brown. Beneath, face yellowish marked with 

 red lines in the furrows, and with black irregular projections on 

 the upper and lower edges. From the latter a conspicuous blunt 

 hook-like line extends on each side, and anterior to these lines are 

 eight small symmetrically arranged spots. Clypeus black above, 

 with yellow on the sides. The cheeks are dusky yellow, hairy, 

 with some black near the clypeus. Lore small, as in Oncome- 

 topia, color black. 



Thorax. Pronotum nearly black, with yellow spots 

 much finer and thicker than those on the head, the deflexed 

 side-margins, however, with fewer and coarser spots. Scutel- 

 lum small, triangular, basal portion l)lack, middle portion yel- 

 low, and extreme tip brown, shading into black on the terminal 

 spine. Beneath yellow, dusky towards the middle, marked 

 with a few black spots. Femur light yellow, basal end black, 

 and apical third brownish yellow; tibijB and tarsi dark 

 yellow tipped with black. Not so spiny as Oncometopia. 

 Elytra reddish brown irrorate with minute yellow spots, tip 

 hardly hyaline, marginal membrane distinct, venation variable. 

 Wings transparent. 



Abdomen. Red above, yellowish beneath, with a broad 

 median and a narrower sutural black line. Female ovipositor 

 black with the sheaths red. The male differs in the still 

 wider median black genital armature. 



This fine species is not an uncommon insect, and though 

 easily mistaken for Oncometopia at a first glance is easily 

 distinguishable. 



