REPORT OF THE ENTOMOLOGIST. 29 



of its back. This insect punctures the leaves and extracts the sap from 

 the butternut, hop-tree, and locust ; it also is found on weeds. lu Mary- 

 laud it is common on locust, and may sometimes be seen in great num- 

 bers arranged in a line on a twig or branch near the body of the tree 

 busily employed in sucking out the sap, which attracts myriads of ants, 

 in the same manner as the so-called honey-dew produced from the anal 

 tubercles of plaut-iice. 



Telamona ampelojysidts is a curious tree-hopper, about 0.50 in length 

 to the tips of its wings, of a brownish-gray color when dead No. 12. 

 and dried, and a largo and somewhat square hump projecting 

 from its back, which slopes or leans slightly toward the hinder 

 part of its body. As its specific name implies, it is found on 

 the A7npelo2)sis, or Virginia creeper, but also frequents grape- 

 vines, and is rare in Maryland. 



Entilia {Blemhracis) concava is a verj' small tree-hopper, 0.15 to 0.18 

 in length, with the ridge of the back somewhat elevated No. 13. 



in front so as to form a slight concavity in the middle, ^^b^k. 

 or rather before the middle part of the back ; the body ^^^^ ^^ 

 is marked with dilated punctures. It is of a dark color, ^ 

 and quite inconspicuous in appearance ; it is taken on weeds. 



Another species, Entilia {Memhracis) carinata, has the ridge of its 

 back or keel deeply scooped out in a compete semi-circle, so as No. 14. 

 to make a kind of protuberance in front, separated ftom a ^^ 

 square leaning hump on the ridge of its back by the aforesaid 'TT' 

 scooped out semi-circle ; it is 0.20 in length, and of a brown color, and 

 has been taken on potato-plants, but is quite rare in Maryland. 



Ceresa huhalus, or the buffalo tree-hopper, is a very singularly-shaped 

 insect, being broadest in front and shaped something like a No. 15. 

 beech -nut anteriorly, with a short sharp point at each side 

 jutting out horizontally like the short horns of a bull, and end- 

 ing also in a sharp j)oint ; it forms a kind of triangle on the 

 front part of the insect, and presents a very singular appearance, espe- 

 cially as when viewed from the back; it grows narrower until it ends 

 in a sharp angle at the ends of the wings. The insect is about 0.30 to 

 0.40 in length, of a green color, and has transparent wings sloping like 

 the roof of a house. This insect is common on a variety of trees in Mary- 

 land, apple, peach, grape, and willow, and, when on the locust, gener- 

 ally stations itself in an angle where the leaf-stalk arises from a branch, 

 and where it is almost hidden away. The eggs are deposited in a short 

 curved row, in a series of punctures made by the ovipositor of the 

 female in the bark and sapwood. The larvse are shaped something like 

 the perfect insects, but are somewhat spiney ; as perfect tree-hoppers 

 they are very active, and leap with great agility on being disturljcd, 

 and feed on sap of apple and peach trees, willow and grape-vines, and 

 have been accused of injuring the stems of grape-vines by the punc- 

 tures they make in which to deposit their eggs. The color of the insect 

 being green, it is not very readily distinguished from the leaf itself 

 when in a state of rest. 



Ceresa diceros resembles C. hiibaliis very much in outward appearance, 

 but appears to be somewhat smaller, and differs also in being no. 16. 

 marked with three or more dark brown spots on its upper 

 wings ; it is frequently swept up in the same net when beat- 

 ing for other insects on low bushes and in tall herbage or 

 grass. In Maryland it is tolerably common. 



Thelia Mmacidata, or two-spotted tree-hopper, is 0.45 to 0.50 in length; 



