1922] NATURAL SCIENCES OF PHILADELPHIA 275 



minute tooth on the dorsal (internal) margin, directed mesad. 

 Subgenital plate ample, lateral margins convex-convergent to the 

 short but broadly concave distal margin, styles (destroyed in 

 type) situated in sockets at the disto-lateral angles formed by these 

 margins. Ventral femoral margins armed with small spines, as 

 follows. Cephalic internal 1 to 1, cephalic external 0, median 

 internal 3 to 4, median external 2 (very small) and 0, caudal 

 internal 3 to 5, caudal external 0. Caudal tibiae with apex supplied 

 only with a pair of ventral spurs, scarcely larger than the pre- 

 ceding spines. 



Allotype: 9 ; same data as type. [Hebard Collection.] 



Form like male, thick-set. Tegmina nearly circular, lateral, 

 separated by a space slightly greater than the tegminal width. 

 Vestigial wings almost entirely concealed, extending as far caudad 

 as tegmina (slightly beyond caudal margin of metanotum) . Supra- 

 anal plate transverse, with free margin broadly convex. Ovi- 

 positor slender, straight, longer than body, the dorsal margin 

 showing a weak, roughened channel (as in Terpandrus) toward 

 the aciculate apex. Subgenital plate broader than long, lateral 

 portions embracing base of ovipositor, margin at apex weakly 

 angulato-concave. 



Color pattern as figured, chestnut brown and clay color in male, 

 cinnamon brown and clay color in female with delimiting lines of 

 buff. 100 Tegmina tawny olive, in part washed with dark brown. 

 Limbs cinnamon, the femora necked with blackish brown, the 

 caudal femora with longitudinal streaks of the same distad, their 

 apices and brief section preceding these streaks immaculate. 



Length of body d* 31.5, 9 31.8; length of pronotum d" 10.7, 

 9 10.7; cephalic width of pronotum d 71 6.8, 9 7.3; caudal width 

 of pronotum d 71 8, 9 8.2; exposed length of tegmen d" 7.7, 9 4.1; 

 width of tegmen cf 8.7, 9 4; length of cephalic femur d 71 8, 9 8.8; 

 length of caudal femur d 71 16, 9 18.6; length of ovipositor 33.8; 

 median width of ovipositor 1.6 mm. 



This singular insect is known from the described pair. 



GRYLLACRINAE 



Little effort appears to have been made in assigning the multitude 

 of species of the present genus to anything like natural groups or 

 logical sequence. The type of wing coloration would first appear 

 to be the most useful character for sorting to groups, but further 

 study shows that, by such sorting, species having very great struc- 

 tural differences would be thrown together. 



With the few species at present under consideration, we have 

 arranged the linear sequence on the basis of the female ovipositor. 



10 ° These are clearly variations of the same pattern, probably subject to de- 

 cided individual diversity in the species. 



