Biology of the Membra cidae of the Cayuga Lake Basin 235 



The eggs are laid in the young stems of apple just beneath the bark, 

 in groups of four or five. The egg puncture is a ragged one and fails to 

 heal smoothly, leaving a characteristic scar which has been well figured 

 by Hodgkiss (1910:98). Oviposition occurs over an extended period 

 during July, August, and September. The eggs winter over and hatch 

 about the first of May. Almost immediately the nymphs migrate to 

 sweet clover, where they spend the most of their lives, the mature females 

 returning to the apple only to oviposit. 



The life history of a closely related species, S. festina, has been care- 

 fully worked out by Wildermuth (1915), who finds the eggs laid in the 

 stems of alfalfa. If this is true in the case of sweet clover it has not 

 been discovered by careful search. Since the clover dies down during 

 the winter and there is no evidence of the adults' wintering over, this 

 theory does not seem tenal^le. 



Technical description. — Fine large species, brilliant green slowly fading to yellowish in 

 dried material; metopidium perpendicular; dorsal crest high and arcuate; posterior process 

 slender and curving downward; tegmina and wings entirely hyaline; upper parts of femora 

 often marked with black. 



Head broad, nearly smooth, very finely and faintly punctate, longitudinally striate; eyes 

 prominent, subtriangular, very dark bordered with white, extending beyond adjoining lateral 

 margins of pronotum; ocelli prominent, brownish, nearer to each other than to the eyes; 

 inferior margins of vertex broadly sinuate; clypeus broad, sparingly pubescent, median lobe 

 of apex extending below lateral lobes. 



Pronotum densely and coarsely but not deeply punctured; metopidium convex, median 

 carina distinct but irregular; sides of metopidium meeting before middle of body; lateral 

 semicircular impression deep; posterior proce.ss long, slender, gradually acuminate, curving 

 downward, extending beyond abdomen and reaching about halfway from internal angles 

 to apices of tegmina. 



Tegmina entirely hyaline, slightly wTinkled, bases greenish and lightly punctured. Under- 

 surface of body yellowish; segments of abdomen in some cases bordered with black; notch 

 of last ventral segment of female broadly angular. Femora often marked with black above; 

 tarsi ferruginous. 



Length to tips of tegmina, 9 mm.; width between humeral angles, 4 mm. 



12. Stictocejjfiala lutea Walker (Plate xxv, 15-17) 



1851 Thelia lutea Walk., List Horn. B. M., p. 559. 



1851 Thelia inermis \Valk., List Hom. B. M., p. 1142. 



1854 Gargara pectoralis Emm., N. Y. Agr. Rept. 5: 157, pi. 13, fig. 12. 



1869 Stictocephala lutea Stal, Hem. Fab. 2:24. 



1869 Stai, Bid. Wenib. Kan., p. 247. 



1892 Godg., Ins. Life 5:92. 



1894 Godg., Cat. Memb. N. A., p. 410. 



1903 Buckt., Mon. Memb., p. 174. 



1903 Buckt., Mon. Memb., p. 195, pi. 42, fig. 7. 



1903 Buckt., Mon. Memb., p. 219, no. 16. 



1905 Van Duzee, N. Y. St. Mus. Bui. 97:552. 



