McAtee — Memhracidae of the Vicinity of Washington, B.C. 129 



CC. Face distinctly punctured, clypeus not polished, 

 females green, pronotum of males dark on sides 

 with a pale median dorsal vitta interrupted before 



apex... querci. 



AA. Pronotal crest pinched-in laterally at one or more points, thus hav- 

 ing compressed and inflated portions; often with one or more 

 sinuations in the dorsal outline, and usually highest behind 

 humeral angles. (Subgenus Cyrtolobus.) 

 D. Highest point in pronotal crest immediately behind humeri, 

 dorsal outline very evenly curved. 

 E. Dark brown with pale oblique median and subapical 

 crossbands. 



F. Larger, markings less contrasted fenestratus. 



FF. Smaller, markings more contrasted. ..inerwis (J*. 

 EE. Without definite crossbands. 



G. Pronotal crest twice as high as head 



ovatus. 

 GG. Pronotal crest less than twice as high 



as head ...inermis 9 . 



DD. Highest point in pronotal crest farther back, dorsal outline 

 with a distinct hump bounded by a smaller anterior 

 and a more pronounced posterior depression. 



H. Pale brownish in color without 

 distinct markings 



intermedius. 



HH. With distinct bands across 



pronotum. 



I. Principal oblique dark 



color band separ- 



rated from dark 



apex of pronotum 



by a pale subapical- 



crossband. van. 



II. This color band paler ex- 

 cept along anterior 

 edge,butvery broad, 

 covering posterior 

 half of pronotum ; 

 no subapical pale 

 band sculptus. 



Subgenus ATYMNA Stal. 



C. castaneae Fitch — Has been abundant, but unless it is adaptive 

 enough to change its food plant, it will practically disappear as has its 

 host the chestnut {Castanea dentata). Dates of collection of adults range 

 from May 28 to July 12. 



C. inornata Say. — Scotts' Run, Va., July 25, 1915, McAtee. 



C. querci Fitch.— Beltsville, Md., June 23, 1918, McAtee; May 28, 1919, 



