branch: biology of KANSAS MEMBRACID^. 101 



the front margin of the metopidium present a concave line. Clypeus 

 usually produced below the face, causing a break in the contour of the 

 ventral line. 



Length, 7 to 8 mm. Described from twelve specimens. 



Habitat: Oak Creek canyon, Arizona; Lush, Wyo.; Columbia and 

 Kansas City, Mo.; Welland county, Ontario; Colorado; North Carolina; 

 Douglas, Sedgwick and Rawlins counties, Kansas. 



2. — Genus Stictocephala Stal. 

 This genus comprises a large number of species. Van Duzee gives 

 eleven species for North America, three of which occur in Kansas. The 

 members of this genus, like Ceresa, are green when alive, turning to a 

 yellow or orange hue, frequently mottled, when dry, and covered over 

 with small white dots. Its characteristic differentiation from Ceresa 

 is the absence of the produced horn-like suprahumerals. 



A. Carinate sides of the metojiidium meeting before the middle of the bod.v. 



B. Metopidium, viewed from before, obviously widened upward to the rounded 

 suprahumeral angles. Length of insect, 7.5 to 8 mm. 



C. Lorai continuing ihe rounded contour of the cheeks; the clypeus 

 scarcely longer than the cheeks. Last ventral segment, of the female 

 broadly and subangularly excavate behind. Inhabits a region east 



of the continental divide 1 — iiicrmis Fabr. 



A A. Carinate sides of the metopidium with no distinct meeting before the middle of the 

 body. 



B. Metopidium, viewed from before, widened upward to the obtuse supra- 

 Immeral angles. 



C. Dorsum, viewed laterally, distinctly arcuate ; metopidium high, its 

 sides angulate or subangulate; distinctly carinate, uniting some- 

 what behind the middle of the dorsum. Face evenly and regularly 



punctate, cariuEe frequently rufous 3 — festina Say 



BB. Metopidium regularly narrowing above the suprahumerals. 



C. Carinate sides of the metopidium meeting at or near the middle. 

 Dorsum elevated. Face smoothly corrugated, evenly and closely 

 punctate. Clypeus and lora^ little produced. Length of insect, 6 to 

 6.5 mm. 



D. Pectus and outer face of femora black ; clypeus briefly but 

 obviously produced beyond the lines of the cheeks. 



2 — hitea Walk. 



1. — Stictocephala inermis Fabr. Figs. 16, 17, 66 and 89. 



This is the largest species of the genus. In cephalic aspect, the meto- 

 pidium shows slight obtuse suprahumerals, but these are in no case pro- 

 duced as in Ceresa. The metopidium rises from the head in a perpen- 

 dicular plane, which almost immediately inclines slightly forward, causing 

 the front of the metopidium, when viewed laterally, to present a curved 

 surface. The metopidium, above the line of the suprahumerals, curves 

 gently backward. Cephalad of the middle of the pronotum, the plane of 

 the metopidium is terminated by the union of the dorsal carinje of the 

 suprahumerals, thus forming an isosceles triangular plate as in Ceresa. 

 From this point the dorsum slopes gently downward and backward to 

 meet the posterior process, which is usually dark and always acute. The 

 dorsum bears a longitudinal median carina, which is sometimes rufous or 

 dotted with light brown. The sides of the pronotum are concave or in- 

 wardly arcuated, and the ventral line, which is carinated, slopes rapidly 



