288 PROCEEDINGS OF THE ACADEMY OF [May-Oct., 



small, dorso-internal spur twice as long as the ventro-internal one: 

 caudal metatarsi with two spinulations on the external, and a single 

 one on the internal, margins; internal distal metatarsal spur sub- 

 equal to the metatarsus in length. Ovipositor slightly longer than 

 the caudal femora, the structure of the apices very similar to that 

 of the recently described A. surdus Rehn," the marginal teeth, how- 

 ever, slightly smaller, more regular and more acute. 



General coloration ochraceous-buff; a pronounced grouping of 

 spots along the cephalic, and a less decided row of the same along 

 the caudal, margins of the dorsum of the pronotum, fuscous; a 

 poorly defined speckling on the limbs and over much of the pronotum, 

 cinnamon-brown; eyes cinnamon-brown; tegmina pencilled in weak 

 tawny, the proximal third of the humeral vein lined ventrad with 

 fuscous; ovipositor tipped with fuscous. 



Length of body, 13.6 mm.; length of pronotum, 2.8; greatest (cau- 

 dal) width of pronotum, 3.9; length of tegmen, 15.5; greatest width of 

 dorsum of tegmen, 3; length of caudal femur, 11; length of ovipositor, 

 11.8. 



In addition to the type we have before us a paratype female with 

 the same data as the type, except that it was taken in February, 

 1883. This specimen is slightly larger than the type and has been 

 badly damaged, lacking all the limbs excepting the dextral median, 

 one and the dextral caudal femur, while the tegmina are not perfect. 

 It is in a more intensive type of coloration than the type, 

 having the punctulation much heavier, far more numerous and fus- 

 cous; washes on the fastigium, in the median area of the pronotum, 

 irregular beading along the median vein of the tegmina and a spot 

 at the base of the humeral trunk, cloucUngs on the tegminal "sec- 

 tors" and beading along the ventral margins of the caudal femora, 

 fuscous. 



Nessa vectis new species. (Plate XI, fig. 43; text figure 3.) 



This species is referred to Nessa provisionally, as it may prove to 

 be generically distinct from the poorly known genus of Walker. 

 From the description of the genus Nessa, and the genotypic N. 

 linearis, the new species differs in the pronotum being slightly broader 

 than long, in the ovipositor faintly surpassing the length of body 

 and very much longer than the abdomen, in the caudal tibiae having 

 six external and seven internal spines on the dorsal margins, in the 



" Proc. Acad. Nat. Sci. Phila., 1918, p. 230, pJ. II, figs. 71, 72, 73 and 74,. 

 (1918). 



