700 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Key to Species. 



i. Hemielytra with a distinct transverse dark band at both base and 



apex, the intervening area almost or quite immaculate laterally . . 6 

 Hemielytra otherwise marked 2 



2. Membranous parts largely hyaline ; hood scarcely higher than 



median carina ; hemielytra with basal band only . . arcuata var. mali . 

 Membranous parts largely yellow, brown, or milky white 3 



3. Milky white, usually with brown spotting 5 



Yellow or brown 4 



4. Median carina high, arched dorsally pallida 



Median carina low, straight dorsally ulmi 



5. Immaculate, . or with two small brown discal dots on hemielytra ; 



hood nearly flat dorsally, about as high as median carina ciliata 



Spotted, the markings uniting to form two transverse bands at apex 

 of hemielytra ; hood more convex dorsally, higher than median 

 carina marmorata 



(a) Hemielytra long, the discal elevations not extending to 



middle var. marmorata typical 



(b) Hemiel}'tra short, the discal elevations extending to middle 



var. informis 



6. Hood and median carina of equal height 7 



Hood distinctly higher than median carina 8 



7. Hood but slightly constricted; width of pronotum across paranota 



greatest well before middle pruni 



Hood distinctly and sharply constricted; width across paranota 

 greatest at middle arcuata var. typ. 



8. Hood small and low, its width about equal to greatest distance 



between lateral carinae 9 



Hood large and high, wider 10 



9. Marginal spines absent or vestigial ; markings reduced to spots . . 



mollicula 

 Marginal spines distinct; markings more regular .pergandei 



10. Apical band of hemielytra evenly transverse, its posterior margin 



straight; markings very dark; hood very high and angulate 



dorsally cydoniae 



Apical band irregular ; markings usually paler . n 



11. Size large, length about 4 mm.; hood large, globose, its width more^ 



than one-third distance across paranota associata 



Size smaller, length less than 4 mm. ; hood usually narrower 12 



12. Areoles of hood and paranota opaque; hood very high, the dorsal 



line abruptly rounded at summit, straight in front elegans 



Areoles of hood and paranota largely hyaline ; 13 



13. Coloration very pale, the markings indistinct; anterior margin of 



apical band transverse _ juglandis 



Coloration dark, the markings distinct 14 



14. Hood low, but little higher than median carina, the summit broadly 



rounded contracta 



Hood high, at least twice as high as median carina 15 



15. Size large, length about 3-9 mm. ; hood large globose, evenly 



rounded dorsally pallipes 



Size smaller, length less than 37 mm.; hood somewhat smaller 

 not globose, sides meeting at a sharp angle along median dorsal 

 li ne heidemanni 



C. associata Osborn and Drake. 



Ohio Jour. Sci., xvii, 14, 1916. 



A large species, feeding- on the wild cherry, which has been found 

 on Long Island, N. Y., and probably occurs within our limits. 



