Vol. XXIV] ENTOMOLOGICAL NEWS 451 



A new North American Genus Belonging to the 

 Group Nemobiites (Orthoptera, Gryllidae). 



By MORGAN HEBARD, Philadelphia, Pa. 

 Hygronemobius* n. gen. 



1905. Nemobius Morse (not of Serville, 1839), Psyche, XII, pp. 

 21-22. 



The genus is monotypic. Genotype Hygronemobius alleni 

 [Nemobius alleni] (Morse). 



Allied to Nemobius,^ from which genus it may be separated 

 by the somewhat differently shaped pronotum, much reduced 

 tympanum of the caudal face of the cephalic femora and very 

 different armament of the caudal tibiae. 



Though nearer to Nemobius than to any of the other allied 

 genera, the facts that in the present genus the tegmina of the 

 male lack a tympanum and the caudal tibiae are each sup- 

 plied with five, not six, distal spurs, show that in these char- 

 acters it agrees instead with Paranemobius,\ which genus is, 

 however, very different in numerous other important respects. 

 Generic Description. Size small ; form compact ; body 

 pubescent and sparsely clothed with hairs. Head and its ap- 

 pendages similar to Nemobius, but 

 with interantennal protuberance 

 somewhat more feeble. Pronotum 

 similar to Nemobius, excepting the 

 ventro-cephalic angles of lateral 

 lobes which are rectangulate and 

 much sharper than the ventro- 

 caudal angles. Tegmina very ab- 

 breviate in the male and wanting 

 a tambourine, having a single 

 oblique vein as in Nemobius. 

 Wings absent. Caudal face of 

 cephalic tibiae bearing a small, 



*From vXpos = moist, and Nemobius = grove-dweller. 



1 1839. Serville. Hist. Nat. des Ins., Orth., p. 345. 



j 1877. Saussure. Melang. Orth., II, Fasc. V, pp. 226, 231, 234-235, 

 fig. IV. 



All of the females known of this genus are nymphal, and 

 Morse's statement that this sex is wingless, as well as his descrip- 

 tion of the ovipositor, in consequence cannot be used as char- 

 acters for the genus or species. The nymphal females, though 

 about two-thirds grown, show no trace of tegminal development. 



