302 Annals of the Carnegie Museum. 



Aphidnia Brunner, Mon. Phaneropt., pp. 19, 151 (1878); lb., Addit. Mon. 

 Phaneropt., p. 9 (1891). 



The insects belonging to this genus are exceedingly interesting 

 creatures, because they strongly imitate in their colors bark, twigs, 

 and even stones which are coated with lichens. Several species are 

 known, and all of them inhabit tropical American countries. They 

 are either rare, or so well protected by their imitative colors, as to 

 render their discovery difficult. But few individuals of the known 

 species are found in collections. 



6. Dysonia elegans (Brunner). 



Aphidnia elegans Brunner, Mon. Phaneropt., pp. 153, 155 (1878). 

 Dysonia elegans Kirby, Syn. Cat. Orth., II, p. 411 (1906). 



Habitat. — A single female specimen of a specie^ determined as 

 elegans Brunner is at hand. It was taken by H. H. Smith, at Chapada, 

 Brazil, during the month of January. 



7. Dysonia punctifrons (Brunner)? 



Aphidnia punctifrons Brunner, Men. Phaneropt., pp. 152, 154, PI. 3, fig. 40 



a, b (1878). 

 Dysonia punctifrons Kirby, Syn. Cat. Orth., II, p. 412 (1906). 



Habitat. — A female of another species of this genus is referred to 

 Brunner's punctifrons with some doubt. It comes from "Province 

 del Sara, Bolivia," where it was collected at an elevation of 450 

 meters above sea-level by J. Steinbach. 



8. Dysonia (?) lamellipes sp. nov. 



There is also an additional species of katydid at hand, which appears 

 to belong to the genus Z)3'50?zm. It is represented by a single 9 nymph 

 also taken by J. Steinbach during November in the "Province del 

 Sara, Bolivia," at an elevation of 350 meters above sea-level. It 

 differs from the imagos of the various described forms to such an 

 extent that it very likely represents a new form. In color this n>mph 

 is largely brunneo-ferruginous somewhat varied with grayish testa- 

 ceous. It has the disc of the pronotum smooth and flat, save that 

 the surface is very finely transversely aciculated, with the hind lobe 

 much ampliated, while the lateral lobes are nearly perpendicular 

 and joined to the disc by sharp carinas which are sinuose. The hind 

 femora are provided internally on their apical third with a single 

 large, flattened, horizontalK' directed, lobe-like plate the hind margin 



