Biology of the Membra cidae of the ("ayuga Lake Basin 279 



line straight; posterior process short, tectiforrii, gradually acute, not reaching bases of apical 

 cells of tegmina. 



Tegmina very dark, basal two-thirds deep brown, almost black, apices strongly marked 

 with brown, narrow area between these two brown regions hyaline. Undersurface of pro- 

 thorax marked with browai; abdomen and legs flavous. 



Length 6.5 mm.; width 2 mm. 



51. Atymna querci Fitch (Plate xxvni, 13) 



1851 Smilia querci Fitch, Cat. Ins. N. Y., p. 49. 



1851 Thelia querci Walk., List Horn. B. M., p. 1143. 



1854 Gargara querci Emm., N. Y. Agr. Rept. 5: 156, pi. 13, fig. 8 



1878 Smilia querci Glover, MS. Journ. Horn., pi. 2, fig. 11. 



1890 Atymna querci Van Duzee, Psyche 5:390. 



1891 Osborn, Iowa Acad. Sci. 1-:128. 

 1894 Godg., Cat. Memb. N. A., p. 435. 



1908 Cyrtolobus (Atymna) querci Van Duzee, Stud. N. A. Memb., p. 93. 



1912 Cxjrtolohus querci Matausch, Bui. Amer. Mus. Nat. Hist. 31 :335, pi. 31, fig. 14. 



1915 Atymna querci Funkh., Fitch's Types, p. 49. 



1915 Metcalf, Hom. No. Car., p. 8. 



1916 Van Duzee, Check List Hem., p. 61, no. 1692. 



Very common on oak and often taken on other hosts in the neighbor- 

 hood of oaks. Since the insects are strong flyers it is probable that their 

 appearance on the other trees is accidental. The eggs and the nymphs 

 are found only on the oak — principally the white oak — which doubtless 

 accounts for the specific name. The species is found thruout the summer. 



The insects of this species are smaller than those of A. castaneae. The 

 females are uniform green with the pronotum closely punctate; the males 

 brown with a light golden stripe down the median dorsal line, this stripe 

 being broken near the posterior end of the pronotum so that the whole 

 marking appears as a long dash followed by a dot. 



Technical description. — Females large and green, males smaller and brown with a broken 

 yellow median dorsal stripe; body long and narrow; crest highest above humeral angles and 

 gradually sloping to posterior ape.\ without a sinus. 



Female: Head projecting sUghtly forward, pale yellow, sculptured, irregularly punctate, 

 not pube.scent; eyes very prominent, reddish; ocelli not prominent, yellow; clypeus extending 

 below inferior margin of face. 



Pronotum uniform green, rouglily punctate, not pubescent, dorsal line faintly marked 

 with brown; posterior process short, acute, not reaching tips of tegmina. 



Tegmina entirely hyaline, bases and costal margins faintly punctate; hind wings iridescent. 

 Legs and undersurface of body green. 



Length 7 mm.; width 2.5 nun. 



Male: Head sordid yellow, sculptured, sparingly punctate; eyes prominent, brown; 

 ocelli pearly; clypeus marked with brown at base. 



Pronotum chocolate brown with bright yellow stripe on median dorsal line and yellow 

 band before apex. 



Tegmina smoky hyaline with brown cloud at apices. Undersurface of thorax brownish; 

 abdomen very dark brown, nearly black. Legs flavous; tarsi ferruginous; claws fuscous. 



Length 6 mm.; width 2 mm. 



