30 REPORT OF THE COMMISSIONER OP AGRICULTURE. 



it is a broTTOish triangular insect, shaped like a 

 beech-nut, with a long horn running obliquely for- 

 ward and upward overhanging thehead, compressed 

 9 and rounded at the end; it has a large, bright 

 yellow or dull gray colored spot on each side. The 

 male differs from the female in the shape and size of its dorsal horn as 

 in the fig. 18, and has been known as anotiier species under the name 

 of T. acuminata it has been taken on locust. 



ISmilia f2icmbracisj inornata, or the unadorned tree-hopper, resem- 

 No. 13. bles Ceresa huhalus in size and color, but has no horn-like pro- 

 "^rx jections on each side and is uniformly rounded in front and on 

 p&r# the back, giving it the appearance of being hump-backed ; it is 

 ■^^ shaped somewhat like a beech-nut, and of a light green color, 

 fading to a light yellow in some specimens; the wings are hyaline or 

 glassy, and dellexed at the sides like a roof; it is 0.35 in length, and 

 found on onk and chesnut in late summer and autumn. 



Stictocepliala {Smilia) incymls, or the unarmed tree-hopper, resembles 

 No. 19. Smilia inornata in general form, but is more rounded on the back. 

 These insects in late summer and autumn make short straight 

 incisions in the bark of small limbs and twigs of pear and chest- 

 nut ; the eggs are then deposited in these incisions and hatch out 

 in spring, when the larvae, pupfe, and perfect insects suck out the sap 

 and thus weaken the trees. The insect is about 0.28 in length, of a 

 uniform pale green color, fading to dirty yellow; when dried the wings 

 are hyaline, and when disturbed it leaps with great agility ; it is not 

 uncommon in Maryland, and is frequently taken when swee])ing with a 

 net for other insects among grass and weeds and brambles ; it has been 

 taken likewise on chinquapin bushes. 

 iSmilia {Memhracis) vau, or the V-marked tree-hopper, is found on 

 No. 20. walnut, hickory, and oak, whereit punctures the young branch- 

 es with its beak, or sucks and drains them of their sap. 

 These insects are about 0,25 in length, v/ith thorax not 

 greatly elevated, but rounded in front, and acutely carinate 

 from before the middle to the posterior tip. These insects are very 

 variable in color, but in dried specimens they are of a dirty yellow, with 

 V-like marks on the back. The thorax forms a high arched crest over 

 the body. The figure is magnified somewhat. 



Archasia galcata (Fab.) {iSmilia auriculata of Fitch) is a very singu- 

 No. 21. larly-shaped tree-hopper, about 0.35 in length, having a very 

 high rounded back ending posteriorly in a sharp point ; its color 

 when dried was of a brownish-yellow and evidently very much 

 faded ; it has been taken on i^rairio Euimtorium and Verbena 

 kastata. 

 ILoploiyhora quadrivittata is a short, thick-set tree-hopper, about 0.35 in 

 No. 2*i. length ; dried specimens of this insect are of a grayish color, 

 having two short and two longer longitudinal lines of a pink- 

 ish color on its back anteriorly; it was taken with a sweep- 

 3,^.,_ net among weeds and bushes, and is rare, but frequents 

 < ^"^ oak. 

 Gercoins bicincta is a very pretty insect, with body sanguineous, (Say,) 

 No. 2:?. thorax blackish, a rufous band on the middle wings, or hem- 

 y^^Tj^ elytra blackish, with two yellow or orange bands running 

 ^fBM| across them ; it was taken very sparingly when beating with a 

 ^ '^■■^^ sweep-net among weeds, grass, and brambles; the insect is 

 about 0.45 in length. Some of the Cercopidw are said to secrete a 

 saccharine substance which is devoured by ants. 



