N. S. ENTOMOLOGICAL SOCIETY 



spring and after passing through five nymphal stages reach the adult condition, after 

 which the eggs are laid and the insects die. All forms that we have studied have but 

 a single brood; others are known to have more elsewhere and it is possible that some will 

 be found to be two-brooded in Nova Scotia. Further short notes on life histories will 

 be given in the discussion of the individual species. 



Classification. 



The tree-hoppers constitute the family Membracidae of the suborder Homoptera 

 and are usually quite small insects, with rather a grotesque appearance. They are 

 more or less triangular in cross-section, the prothorax extending back over the body like 

 a roof. In some species it is produced at the humeral angles into horns, the "supra- 

 humeral horns" and sometimes it is elevated above the body in the form of a horn or 

 crest. 



All our native forms so far discovered fall into two sub-families the Membracinae 

 and the Smiliinae. The former are recognized by their f oliaceous anterior tibia, whereas 

 those of the Smiliinae are cylindrical. (See Plate 6, fig. 2 and 3). 



Subfamily Membracinae 



This family is represented in our fauna by a single genus, represented by a single 

 species viz., Campylenchia latipes Say (Plate 1, Fig. 2). This is a uniform cinnamon 

 brown insect with a prominent pronotal horn projecting forward over the head, this 

 character alone separating it from all other native species. It is about 5mm. long, the 

 horn adding about 3mm. to the total length. This species is taken quite commonly by 

 sweeping in meadows during the months of July, August and September. We have 

 never observed the eggs, which are said to be laid in the upper part of the roots of the 

 golden rod and other plants, in which stage this insect passes the winter. 



Subfamily Smiliinae. 



The remainder of our species fall in the subfamily Smiliinae and the various genera 

 of which our province furnishes representatives, may be separated by the following 

 key: 



A. Elytra entirely free; not covered by pronotum. 



Species with suprahumeral horns. (See Plate 2 and 3, and Platel, 



fig. 5) Ceiesa* 



A. A. Elytra partly or entirely covered by pronotum, no suprahumeral 

 horns. 



B. Terminal cell of hind wing sessile, its base truncate. (See Plate 6). 



C. Pronotum without horn or crest Cat ynota. 



C.C. Pronotum with a flat dorsal crest or horn. 



D. Crest arising from between humeral angles. . . .Glossonotus. 



D.D. Crest arising from behind humeral angles Telemona. 



B.B. Terminal cell of hind wing triangular and petiolate. (See Plate 6) 



C. Base of corium with 3 veins, dorsum rounded Ophideima. 



C.C. Base of corium with two veins. (See Plate 6) 



D. Dorsum strongly elevated with deep median notch Enlylia. 



D.D. Dorsum only slightly elevated with weak median depression 



Publilia 



The genus Ceresa A. & S. 



The genus Ceresa is easily distinguished from all of our other genera by its prom- 

 inent suprahumeral horns. Four species are represented in our collection, which may be 

 separated by the following key: 



