88 Annals of the Carnegie Museum. 



simple, their length about two and one-half times their greatest basal 

 width, acuminate, hirsute; the prosternal spine rather robust at its 

 base, evenly tapering, the apex slenderly acuminate and directed 

 gently cephalad. 



General color greenish testaceous, a little paler below. Sides of the 

 head back of the eyes, and sides of the pronotum marked with a 

 moderately broad longitudinal fuscous band; middle of occiput, the 

 disc of pronotum at middle, the transverse sulci of latter, the dorsal 

 abdominal carina, and the apical margins of three segments also nar- 

 rowly infuscated. Legs greenish, the hind tibiae dark sea-green. 

 Eyes castaneous. Tegmina dark ferruginous, the interspaces between 

 the veins fuscous. Sides of the abdominal segments one to six and 

 metapleura bright blood-red. 



Length of body, cf, 15 mm.; of pronotum, 3 mm.; of tegmina, 

 2.3 mm.; of hind femora, 9.5 mm. 



Habitat: The single specimen, a male, and the type of the species, 

 comes from Buena Vista in eastern Bolivia, where it was taken by J. 

 Steinbach. C. M. Ace. No. 5573. 



Genus Osmilia Stal. 



Osmilia Stal, Recens. Orth., I, p. 68 (1873); Kirby, Syn. Cat. Orth., Ill, p. 539 

 (1910). For further bibliography see Kirby, I. c. 



155. Osmilia flavolineata (De Geer). 



Acrydium Jlavolinealum De Geer, Mem. Ins., Ill, p. 497. pl- 42, fig- 4 (i773)- 



For synonymy see Kirby, /. c. 



This species is represented in the material now being reported upon 

 by the following specimens: One male and a female, Cayenne, French 

 Guiana, February and March, 1917, C. M. Ace. No. 5873; one male, 

 one female, from the Mana River, French Guiana, May. The latter 

 pair belongs to C. M. Ace. No. 6008. 



Genus Rhytidichrota Stal. 



Rhyiidichrola StAl, Recens. Orth., I, pp. 35, 54 (1873); Ib., Bihang. Svensk. Akad. 

 Handl., V, no. 4, pp. 34, 75 (1878); Brunner, Ann. Mus. Gt'neve, XXXIII, 

 p. 148 (1893); Brunek, Biol. Centr.-Am., Orthop., II, p. 337 (1908); Ib. Ann. 

 Carn. Mus., VIII, p. 141 (1910); Ib. I. c, p. 505 (1911). 

 The insects, which are included in this genus, are all confined to the 



tropical portions of America. They are of medium size, apterous, and 



