236 W. D. FUNKHOUSER 



1908 Stictocephala lutea Van Duzee, Stud. X. A. Memb., p. 49, pi. 1, fig.s. 14, 31. 



1909 Smith, Ins. N. J., p. 91. 



1910 Matausch, Journ. N. Y. Ent. Soc. 18: 166. 



1911 Osborn, Journ. Econ. Ent. 4: 139. 



1913 Branch, Kans. Univ. Sci. Bui. 8: 102, figs. 28, 29, 90. 



1913 Shelford, Anim. Comm., p. 298. 



1913 Funkh., Horn. Wing Veins, fig. 31. 



1914 Van Duzee, Can. Ent. 46:388. 



1915 Metcalf, Horn. No. Car., p. 7. 



1916 Van Duzee, Check Li.st Hem., p. 59, no. 1598. 



Commonest on trees, particularly oaks. Less common on grasses, in 

 which respect it differs from the preceding species. Recognized by the 

 dark uncler-thorax and femora, and by the small size. 



The nymphs of this species have not been distinguished. .In a number of 

 instances nymphs that were thought to be those of S. lutea have been fountl 

 on small oak seedlings, but attempts to rear them proved imsuccessful. 



Technical description. — Small species; grass-green above, usually marked with black below; 

 metopidium sloping, dorsal crest not high, not regularly arcuate; tegmina smoky hyaline. 



Head perpendicular, subtriangular, broader than long, finely punctate, sparingly pubescent, 

 weakly sculptured; eyes prominent, brown usually banded with reddish, extending outward 

 as far as lateral angles; ocelli distinct, yellowish margined with brown, much nearer to each 

 other than to the eyes; inferior margins of vertex weakly sinuate, their ventral mesal angles 

 ending in hooks; clypeus robust, extending only slightly beyond inferior margins of vertex. 



Pronotum closely and deeply punctate; metopidium convex, median carina faint, smooth 

 yellowish area on each side near base of head, sides of metopidium meeting at or a little before 

 middle of body; dorsal crest not high, sloping gradually from junction of carinate edges of 

 metopidium to posterior process; semicircular lateral impression weak; posterior process 

 slender, gradually acute, extending as far as tip of abdomen and to a point on tegmina half- 

 way between internal angles and apices. 



Tegmina hyaline, smoky at apices. Underparts of thorax distinctly black. Legs generally 

 marked with black. Notch of last ventral segment of female very small or obsolete. 



Length 6.5 mm.; width 2 mm. 



The working-out of the life history of this species is one of the problems 

 that remain unsolved. Oviposition has never been observed and the 

 nymphs have not been positively identified. Its general life habits seem 

 to be quite different from those of »S'. inermis. 



The genus Acutalis Fairmaire 



The genus Acutalis contains a limited number of small species, only 

 one of which is represented in the fauna of the Cayuga Lake Basin. The 

 genus is characterized by the small size of the insects, the dark colors 

 of the prothorax, and the five apical cells of the tegmina set off by distinct 

 veins. 



