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



blackberry. Distinguished from C. diceros, the only species with 

 which it is likely to be confused, by its smaller size, lighter color, 

 hyaline tegmina, and difference in arrangement of bands on the 

 pronotum. Its life history is not known. 

 Hosts : Blackberry, raspberry. 



Stamford, 16 Aug., 1912 (W. E. B.) ; North Branford, 24 July 1021 

 (M. P. Z.). 



C. basalis Walker. 



1851. Ceresa basalis Walker. List Horn. Brit. Mus., ii, 527. 



1893. Ceresa melanogaster Osborn. Bui. Nat. Hist. Lab. Iowa State 



Museum, ii, 390. 



1894. Ceresa turbida Goding. Cat. Memb. N. A., 404. 



1903. Ceresa semibrunnea Buckton. Mon. Memb., 174, pi. 36, fig. 6. 



Common. Often found in gardens on cultivated plants. Easily 

 recognized by the black undersurface of the body which is a suffi- 

 cient specific character for separation from other local species of 

 the genus and has suggested several synonyms as above. One of 

 the last of the membracids to appear in the summer since the eggs 

 do not usually hatch before the first of July and adults are not 

 common in the field until the middle of August. Mr. Woodruff 

 reports that the favorite host around Litchfield seems to be clematis. 



Hosts : Rose, blackberry, sweet clover, apple, dogwood, thistle, 

 clematis. 



East Hartford, 9 Aug., 1904 (P. L. B.) ; Kent, 10 Aug., 1918 (B. H. W.) ; 

 Litchfield, Aug. and Sept. (L. B. W.) ; Cornwall, 16 Aug., 1920 (K. F. C). 



C. palmeri Van Duzee. 



1908. Ceresa Palmeri Van Duzee. Can. Ent, xl, 114. 



A small species with a decided reddish tinge along the dorsal 

 line of the pronotum, pronotum high and not pubescent, supra- 

 humeral horns short, terete and but little recurved. 



Hosts : Young hickory, white oak saplings, red oak, swamp 

 white oak. 



Litchfield, Aug. and Sept. (L. B. W.) ; Hamden, 15 Aug., 1921 (P. G.). 

 C. borealis Fairmaire. 



1846. Ceresa borealis Fairmaire. Rev. Memb., 284, No. 5. 



Abundant. Found on a wide variety of plants and in a wide 

 range of habitats. May be recognized by its very hairy pronotum. 

 The insect is of rather small size, uniform color, convex pronotum. 

 curved dorsum, and very slightly decurved posterior process. The 

 last ventral segment of the female shows a broad, triangular notch. 



The eggs are laid on the smaller twigs and sometimes in the 

 buds of apple, pear, hickory and other trees in August and Sep- 

 tember. The nymphs appear early in the Spring, often as early 

 as the middle of April, and are rather slow in reaching maturity, 

 the nymphal instars averaging nearly ten days each. 



Hosts: Apple, pear, hickory, wild grape, locust, elder, willow, 

 white oak, red oak, pignut, raspberry, blackberry, sycamore, beech, 

 wild cherry, thistle. 



