416 Dr. J. L. Hancock's Further Studies of 



or subacute ; wings abbreviated, undev^eloped. Anterior and middle 

 femora elongate, compressed, margins entire ; posterior femora elon- 

 gate, superior margin arcuate forward, flattened posteriorly and 

 minutely serrulate the antegenicular lobe of moderate size ; first 

 iirticles of the posterior tarsi nearly twice the length of the third, 

 the jiul villi straiglit below, the first small, the second and third 

 elongate and subequal in length. 



Entire length of body, female, 11 mm.; pronotum 8'8nau.; posterior 

 femora 6*5 mm. 



Two female examples from N. America ; W. W. 

 Saunders' collection, presented by Mrs. F. W. Hope to 

 the University Museum, Oxford, 



2. JV. arcticus, sp. nov. 



A long-wing form, slender in stature, resembling validvs in the 

 vertex and frontal costa, but the head presents a more rounded- 

 obtuse conical profile, the pronotum somewhat narrower between the 

 shoulders, the median carina thinly compresso-elevated, arcuate 

 forward of the humeral angles and subulate posteriorly, extended 

 backward beyond the apices of the posterior femora, wings fully 

 explicate passing the apex of pronotal process, the first articles of 

 posterior tarsi having the first and second pulvilli little flattened 

 below but the apices acute, and the third pulvilli little longer than 

 the second, and distinctly flattened below. 



Entire length of body, female, 13 mm. ; pronotum 10'5_4nm. ; pos- 

 terior femora 5 mm. 



Two female examples from N. America; W. W. Saunders' 

 collection, presented by Mrs. F. W. Hope to the Uni- 

 versity Museum, Oxford. 



This species is at once distinguished from carinatus by 

 the more tumid face and vertex, which presents a rounded 

 obtuse-conical profile, the absence of excavation between 

 tlie eyes of the frontal costa, and the more obtuse angulate 

 front margin of pronotum. 



2a. N. arcticus obtiisus, form nov. 



A short- wing form, probably of articitrS. Body small, granulate ; 

 vertex having the front margin convex, median carina produced ; 

 profile of head obtuse-conical ; frontal costa not at all excavate 

 between the eyes. Pronotum having the front margin obtuse angu- 

 late, dorsum somewhat narrow between the shoulders ; humeral 

 angles widely obtuse, the posterior process abbreviated acute, not 



