Vol. 1.] Van Diizee. — Sijnoptical Keris to Grticra of Miridae. 201 



Corium. — The main portion of the elytra lying exterior to the clavus; 



its outer margin being formed by the costa. 

 Cuneus.—A triangular jiiece, joined by a suture to the apex of the 



corium. 

 Facial angle. — The angle between the line of the bucculae and that of 



the clypeus when viewed from the side. 

 Fracture. — The notch between the apex of the corium and the base of 



the cuneus on the costal margin of the elytra. 

 Front. — The front of the head between the eyes, below the vertex and 



above the clypeus. 

 Gula. — The throat, or lower surface of the base of the head lying 



beneath the rostrum. 

 Lorae. — The narrow segment lying between the upper and lower cheeks 



at the base of the rostrum. 

 Membrane. — The membranous apical portion of the elytra. It carries 



a looped nervure at base forming one large areole and usually a 



second smaller one next the apex of the cuneus. 

 Scutellum. — The basal lobe is usually convex and separated from the 



apical by a suture. This basal lobe is often more or less covered 



by the base of the pronotum and in using this character allowance 



must be made for the depression of the pronotum. 

 Tylus. — Same as clypeus. 

 Vertex. — The basal portion of the superior surface of the head between 



the eyes. It merges insensibly into the base of the front. 

 Festiture. — The covering of hairs on the surface of the body. These 



hairs may be soft or stiff, or they may be flattened and scale-like, 



and are often deciduous and very easily rubbed off. 

 Xyphus (prosternal). — The triangular piece on the prosternum between 



the bases of the anterior coxae. 



Ill the Phylaria three new genera have been established for 

 which there are as yet no described species, and they are there- 

 fore invalid here, but they will soon be validated by the publica- 

 tion of species. These genera are: Leptotylus, Oligofylus, and 

 Strophopoda. One hundred and twenty-five genera are treated 

 of here which, with the eight omitted genera, make a total of 

 one hundred and thirty-three genera recorded from America 

 north of Mexico. 



The following is a fairly close translation of Renter's key to 

 his subfamilies of 1910 : 



1 (16). Membrane biareolate, or with one areole distinctly dilated at 



apex, very rarely without an areole but with several irregular 

 longitudinal veins more or less distinct. Elytra with a distinct 

 cuneus which very rarely becomes confluent with the corium. 



2 (3). Arolia large, free, approximate at base between the claws, 



toward their apex very distinctly divaricate and frequently 

 dilated. 9. Mirinae 



