68 CATALOGUE OF 



side in tlie middle. Fore spines of the head 



and of the prolhorax short. N. tripus, Slal. Subg. Hom alocyphus. 

 h. Hind lobe of llie prolhorax inflated, transversely 



impressed in ihe middle or a litlle before 



the middle, with a horn directed outward, 



slightly curved forward in the middle on 



each side, abruptly and much straightened 



behind the horns, lengthened more hindward 



and then behind the middle abruptly lower 



and narrower, emarginated on the hind 



border. Femora equally thick. Fore tibise 



rather thick; basal part slender; middle 



tibia? slightly thickened before the middle. 



Hind tibia? moderately thickened from the 



base to scarcely beyond the middle. N. 



clavipes, cinctiventris. - Subg. Notocyrtcs. 



B. Head convex beneath near the base, with no 



tubercles. 



a. Head elevated above between the eyes. Hind 



lobe of the prothorax somewhat elevated, 

 slightly depressed on the disk, with an obtuse 

 or rounded angle on each side. N. camelus, 

 fornicalus, triarcatus. - - Subg. Cystingonotus. 



b. Head not or hardly elevated above between the 



eyes. 

 * Spines of the head rather long. Hind lobe of 



the prothorax compressed before the middle, 



with a short horn on each side in the middle ; 



this horn directed outward aud slightly for- 

 ward ; hiud part elongated and rounded, 



depressed or impressed. N. vesiculosus, 



tlavolineatus, consimilis, pulvinatus, drome- 



darius, gibbus. - Subg. Ceratocyphus. 



** Spines of the head short. Hind lobe of the 



prothorax much elevated, with a rounded 



angle or excrescence on each side. Anterior 



libiae slender, or very slightly thickened. 



Hind tibiae somewhat thickened. 

 f Hind lobe of the prothorax very much inflated 



and elevated, forming a rounded angle on 



each side, gradually compressed and 



narrowed before these angles, abruptly 



sloping bindward. N. fungosus, inflatus. - Subg. Saccoderes. 

 ff Hind lobe of the prothorax less inflated and 



elevated, excavated lengthwise on the disk, 



with a short rounded excrescence on each 



side. N. excavatus. - - -Subg. Collocyrtus. 



DICROTELIDA. 



Body long. Head elongated; its tip forming 

 an acute spine; ante-ocular part (excepting 

 the spine) shorter than the post-ocular, with 





