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between their shapes or marking and those portions of the plants which they infest. 

 They are mostly angular in outline, some have the upper surface, which consists chiefly of 

 the enlarged thorax, rough and dark coloured like the bark of a tree ; others have horn- 

 like processes resembling the thorns of a plant ; this simile is further carried out by a habit 

 they have of sitting still for hours on the stem of a plant with their heads all turned one way 

 — upwards towards the end of the shoot. Some again are protected by their colours, as the 

 green species which are found among foliage, or the brown and mottled ones which frequent 

 the bark and stems of trees. Although, as stated above, they will sit still without moving 

 for hours together, they are by no means asleep and are very difficult to capture. A slight 

 movement is sufficient to make them spring from their resting-place with great quickness, 

 and they settle again so suddenly that it is no easy matter to follow them. There is no 

 class of insects which proves so well as these do the advantage of an Entomologist being 

 to a certain extent an artist, for the colours of many of these interesting little insects are 

 so fugitive that many of them lose their brightness almost before they are moved from the 

 setting boards, and for a thorough study, paintings of them as caught are essential. We ■ 

 have several species in Canada, of which the following are some of the most interesting of 

 those taken in the vicinity of Ottawa. They were most of them taken in the beating net, 

 of which an illustration was given in the Canadian Entomologist for 1878, at page 62. 

 I may mention that this net has received a thorough trial at the hands of my colleague, 

 Mr. Harrington, and myself, and we have found it most satisfactory, and by far the most 

 convenient pattern yet brought to our notice. 



Enclienopa binotata, Say : the two-spotted Tree-hopper. — This is perhaps the prettiest 

 and most curious little insect we have of this order. Its shape, in profile, is exactly that 

 of a partridge with outstretched neck and head. It also has the habit of congregating in 

 small clusters on the stems of the plants it feeds upon, and as there are generally speci- 

 mens in all the different stages of growth, they may be likened to a brood of those 

 birds. Sometimes the perfect insects form in single file along a branch, when they look like 

 thorns or excresences of the bark. The long neck-like extension is only a prolongation 

 of the thorax, the head of course is underneath and furnished with a promuscis or beak 

 for sucking sap. The general colour is a dark brown, and there are two yellow spots 

 separated by a black space on the ridge of the back (thorax). The total length is not 

 more than four lines from the apex of the wings to the tip of the thoracic protuberance. 

 One of the most remarkable characteristics of these insects is found in the shape of the 

 four anterior tibia?, which are very broad and flat. It is not an uncommon species, and is 

 found on several trees such as hickory, butternut, locust and Celastrus scandens. 



Smilia vau, Harris. — The Y-marked Tree-hopper is also found on the hickory and 

 butternut. It is about three lines in length with the thorax, which forms an arched 

 crest over the body, rounded in front and keeled from the middle backwards to the tip. 

 It is of a brown colour, and has its back ornamented with Y-shaped marks. 



Entilia carinata, Forster : the keeled Tree-hopper. — This species I have found 

 plentifully on the common sun-flower (Helianthus annuus) clustered together in small 

 families beneath the leaves. They are about one-fifth of an inch long and have two humps 

 on the back, the space between them being in the shape of a complete semi-circle. The 

 colours vary much : in some specimens it is a light cinnamon with wavy lines running to 

 the posterior angle of the very large thorax. In others it is a dark reddish brown with a 

 broad subterminal white band, the front is almost perpendicular and black. 



Ceresa bubalus, Fabr. : the Buffalo Tree-hopper. — The colour of this species is a 

 beautiful green. It is very triangular in shape, and has a pair of sharp curved spines, 

 one on each side of the thorax, which somewhat resemble the horns of a buffalo, and from 

 which fact it takes its specific name. It is a very active species, and flies a long distance 

 when disturbed. I have taken it on young apple-trees and rose-bushes. The eggs are 

 said to be deposited in a curved row, in a series of punctures made by the ovipositor of 

 the female in the bark of several trees. It has been accused of injuring grape-vines by 

 puncturing the bark of the stems for this purpose. 



C. dicsros, Say. — The two-horned Tree-hopper much resembles the last in shape and 



