PROC. ENT. SOC. WASH., VOL. 23, NO. 2, FEB., 1921 31 



carinae, with which they are subparallel; eyes about one and one-half times as 

 long as broad, diagonally situated, when viewed dorsally, and brown in color, 

 obscurely mottled with darker; antennae very moderately ensiform, longer than 

 the head and pronotum together. Pronotum with median and lateral carinae, 

 the latter parallel to near the anterior margin of the disk, where they diverge 

 briefly; anterior margin of pronotal disk truncate, the posterior margin obtuse 

 angulate; lateral lobes subquadrate. Organs of flight more abbreviated than in 

 the other species of the genus, falling considerably short of the tips of the pos- 

 terior femora, in male scarcely passing the middle of the hind femora, in the 

 female attaining to about the base of the apical third; tegmina a little longer 

 than the wings, the tips rounded, not accuminate, the costal margin moderately 

 expanded subbasally; no distinct intercallary vein, though such is indicated by 

 a disconnected median series of veinlets; wings hyaline with the longitudinal 

 veins black, the costal and apical areas being somewhat infuscated. Legs slen- 

 der, brown; hind femora moderately swollen in basal half, the dorsal margin 

 carinate and with a few dark specks, unarmed both above and below, the 

 geniculations blackish, the angles briefly angulate, a sharp median point termin- 

 ating the femora apically; hind tibiae brown with a bluish tint, the spines ten or 

 eleven on each side, and with the apical half piceous. Supraanal plate of male 

 elongate rectangular, very slightly and briefly sulcate longitudinally above; 

 subgenital plate narrowly pointed above; cerci simple and pointed in both sexes, 

 more elongate in the male, where it is fully four times as long as basally broad; 

 last dorsal segment of abdomen in female elongate, above basally flattened and 

 laterally carinate, mesially shallowly concave; last ventral segment elongate, 

 broader behind, with a barely noticeable median carina, the posterior margin 

 truncate with a median brief obscure tooth projecting between the lower valves 

 of the ovipositor, the lateral margins of this segment are posteriorly rounded; 

 valves of ovipositor well exerted, unarmed, the scoop of the upper ones compris- 

 ing about half the length. 



The anal field of the tegmina and the disk of the pronotum in the male are 

 lighter colored than the rest of the ground color, giving a general appearance of a 

 broad dorsal stripe; this may probably be true also in some females, though in 

 the single specimen of that sex now available for study it is not. The lateral 

 lobes of the pronotum in two of the three males examined are blackish above, 

 especially bordering the lateral carinae, while in the female and the third male 

 this is true only to a lesser extent. There is a narrow and usually obscure 

 postocular dark stripe present on the head, anil there is sometimes a greenish 

 tint on the sternum and on the lower surface of the fore and middle femora and 

 tibiae. 



Length, pronotum, male, 4 mm., female, 5.5 mm.; antennae, male and female, 

 12-13 mm.; tegmina, male, 10 mm., female, 12.5 mm.; posterior femora, male, 

 11 mm., female, 15 mm. 



Described from three males, type and paratypes A and B, and 

 one female, allotype. 



Type, allotype and paratype A in Collection U. S. National 

 Museum. Paratype B returned to Prof. Gee. 



Catalogue No. 22973, U. S. N. M. 



