1916.] NATURAL SCIENCES OF PHILADELPHIA. L67 



consequence with a double scries of cells; discoidal area faintly 

 narrowing distad, with irregularly arranged small cells and showing 

 but faint indications of an intercalary vein. Interspace between 

 the mesosternal lobes quadrate, slightly longitudinal; interspace 

 between the metasternal lobes smalj, narrowed caudad, subcuneate. 

 Caudal femora moderately robust, the greatest depth contained 

 four times in the length; caudal tibiae with eleven spines on the 

 external margin. 



Allotype: d" ; same data as type. [Hebard Collection.] 

 Description of Allotype. — Differing from the description of the type 

 in the following particulars, aside from the usual sexual differences. 

 Size small. Head with impressed area of the fastigium more extensive 

 caudad; fastigio-facial angle more obtuse-angulate, facial outline 

 when seen from lateral aspect slightly more oblique; frontal costa 

 nearly subequal in width between the antennal bases and the median 

 ocellus, sulcate throughout, but more distinctly so dorsad; eyes 

 nearly twice as deep as the infra-ocular sulcus is long, while prominent, 

 still slightly compressed when seen from the dorsum; antennae in 

 length very faintly exceeding that of the head and pronotum together. 

 Pronotum very slightly narrower; lateral carinae subobliterated 

 between the first and second transverse sulci. Tegmina slightly 

 surpassing the tips of the caudal femora; ulnar area with large but 

 irregular cells, without a distinct spurious vein; discoidal area as 

 in female. Interspace between mesosternal lobes distinctly longitu- 

 dinal; metasternal lobes attingent caudad. Caudal femora with 

 the greatest depth contained three and one-half times in the length; 

 caudal tibiae with eleven spines on the external margin. 



The coloration of this species runs through the whole gamut of 

 units or phases found in certain other members of the genus, as 

 0. pelidna, showing much greater diversity than in the more closely 

 allied 0. olivacea. It seems unnecessary to more than summarize 

 the more striking of these units, between all of which there seem to 

 be regular intermediates. The males are much more uniform in 

 their coloration than is the case in the female sex. The green extreme 

 unit has the base color clear dull green-yellow (Ridgway) to chal- 

 cedony yellow, running to apple green and even rejane green, the 

 discoidal area of the tegmina with quadrate maculations of fuscous, 

 a distinct postocular suffusion present on head, dorsal portion of 

 lateral lobes and caudo-lateral portions of pronotal disk, the ventral 

 portions of the lateral lobes with or without fuscous linings and 

 hoary tints, the accessory lines on the occiput and femoral bars also 



