1905.] NATURAL SCIENCES OF PHILADELPHIA. 443 



zona, humeral angles distinct on the metazona; cephalic margin sub- 

 truncate ; caudal margin obtuse-angulate ; transverse sulci rather weak, 

 three in number; lateral lobes as deep as long, the ventral angles ob- 

 tuse. Tegmina slightly exceeding the tips of the abdomen and caudal 

 femora, apex rounded, costal expansion slight but elongate. Abdo- 

 men considerably compressed. Prosternal spine erect, thick, conic, 

 slightly retrorse, apex rather blunt. Interspace between the meso- 

 sternal lobes distinctly broader than long, equal to the one of the lobes 

 in width, angles narrowly rounded; interspace between the metaster- 

 nal lobes narrow, longer than broad, the lobes rounded. Caudal 

 femora about twice the length of the head and pronotum together, 

 the greatest width contained three and one-third times in the length , 

 pattern of the pagina low but distinct, pregenicular constriction slight, 

 genicular lobes rotundato-truncate; tibiae slightly shorter than the 

 femur, armed on the external margin with nine spines, on the internal 

 margin with nine including the apical. 



General color bistre sprinkled, lined and blotched on a ground of 

 wood brown. Postocular bar indistinct and face suffused with the darker 

 shade; antennae wood brown irregularly marked with the overlying 

 tint. Pronotum with the humeral angles and the ventral portions of 

 the lateral lobes dull wood brown. Tegmina irregularly blotched and 

 mottled, the intercalary area with regular alternating c^uadrate patches 

 of shining black and wood brown. Abdomen wood brown marked with 

 shining black. Limbs wood brown and vandyke brown blotched and 

 imperfectly annulate ; caudal femora wdth three irregular dorsal patches 

 which extend over on the dorsal portion of the other unmarked wood 

 brown lateral face, genicular region vandyke brown, tibial groove 

 suffused with ochraceous-ruf ous ; caudal tibiae dull ochraceous-rufous, 

 the spines tipped with black. 



Measurements. 



Length of body, 17.5 mm. 



Length of pronotum, 4 " 



Greatest width of pronotum, 3 " 



Length of tegmen, 14 ' " 



Length of caudal femur, ... 9.7 " 



The type only has been examined. 



OSMILIA stm. 

 Osmilia tolteca (Saussure). 



Carrillo, Costa Rica." [U, S. Nat. Mus. and Hebard collection.] One 

 male, five females. 

 29 



