McNeill — revision of the truxalin^e of north America. 217 



IX. ERITETTIX, Bruner. Fig. 9. 



Head conical, occiput not elevated, furnished with three carince, 

 one median and two supplementary; the former extends from the pro- 

 notum to the tip of the vertex where it is enlarged, the latter from the 

 pronotum to a point opposite the anterior margin of the eyes where 

 each suddenly bends to join the lateral carinte of the vertex. The 

 vertex is convex and equilaterally triangular. Its lateral carinae are 

 generally distinct, sometimes heavy, raised lines. The lateral foveolae 

 are present below the vertex, sub-triangular, not deeply impressed, 

 sometimes not very apparent because of the slightness of the lower 

 carinae and because of their small size. The frontal costa has its sides 

 somewhat regularly divergent from the vertex to the clypeus, generally 

 a little constricted about the ocellus and slightly sulcate for a greater 

 or less distance above this point but never sulcate to the vertex. The 

 antennae are thick, generally somewhat flattened at the base and clav- 

 ate at the apex (except variabilis) which is bluntly acuminate and 

 scarcely longer than the head and pronotum. The pronotum has the 

 lateral and median carinae distinct and cut once only by the principal 

 sulcus decidedly behind the middle. In addition to these usual carinae 

 are two supplementary carina; on either side about midway between 

 the median and lateral carinae. The posterior margin of the pronotum 

 is very obtusely angulate. The lateral lobes of the pronotum are 

 aboui as high as they are long, with the anterior border decidedly or 

 little more obli(}ue than the posterior. They have a more or less dis- 

 tinct carina which runs obliquely from the first sulcus to or toward the 

 posterior margin. The anterior lower angle is obtuse, the posterior is 

 rectangular. The lower margin is straight and horizontal on the pos- 

 terior half, straight and slightly ascending on the anterior half. The 

 mesosternal lobes are separated by a space much wider than long, and 

 the metasternal lobes by a space longer than wide, in both sexes. The 

 tegmina and wings are usually well developed (except abotiiva). The 

 former have the mediastine vein well developed, extending much be- 

 yond the middle of the wing and the scapular area in the male 

 widened and filled with a series of rather weak and not very regular 

 oblique veins. There is no intercalary vein and the dividing soon 

 unites with the plicate vein. The ovipositor of the female is nearly 

 included. The posterior femora are more than usually heavy, with the 

 apex extending beyond the abdomen, and they are never banded. The 

 posterior tibiae are obscure or reddish, never blue, and the apical inner 

 spur is about twice as long as the one behind it. 



