288 



The Ohio Naturalist. 



[Vol. V, No. 4, 



Shape suboval, depressed; head short and broad; scutellum 

 small; hemelytra entirely coriaceous and linearly roughened in 

 prominent points, soldered together along a straight suture indi- 

 cated by a groove. Rostrum small. Anterior femora basally 

 incrassate; tarsal claws single. Abdomen rounded. Male gen- 

 ital segments laterally deflected. 



N. stygica Say. (Fig. 1.) 



1831— (1832?)— Naucoris stvgica Say. Descr. of N. Sp. Het. Hem. of N. A., p. SOS. 

 18.50— Conip. Writ, of T. Sav, ed. Le Conte, Vol. I, p. 364. 

 1876 — Nerthra stygica. Say, Stal. Eiuim. Hem. V, p. 139. 



1890 — Montandon, Hem. Crypt. S. fam. Mononychinse, Bull. Soc. Scic., Bucarest, An. Vll, 

 No. 4 and 5, p. 4 (separate). 



(Not — Mononv.x stvgictis Uhl., in Kingslev's Nat. Hist. p. 264, 1885; Uhl., Ch. List, 

 p. 27. 1886; Uhl. Proc. Cal. Acad. Sci., 2d ser. IV, p. 200, 1S93"04; Comstock, Introduction, 

 p. 191, 1888; Comstock, Manual, p. 134, 1809; Howard, Insect Bk., pi. XXIX, fig. 16.) 



Moderate in size, suboval, depressed; head short and broad 

 with four tubercles in the middle, the outer two less elevated 

 than the middle two; triangular in front and reflexed. Eyes 

 reniform, not very prominent. Ocelli absent. Rostrum short, 

 small and so hidden under the head as to be hardly visible (joints 

 not counted for this reason). Prothorax, sides subparallel; cur- 

 vedly converging in the cephalad third ; base slightly sinuate ; 



J.K.T.b 



Fig. 1. Nerthra stygica 

 Say X5. 



Fig. 2. Nerthra stygica 

 Say; feinur and tibia 

 of first pair. X12. 



laterally flattened; apex nearly straight except at the eyes; disk 

 much elevated and roughened. Scutellum triangular, sides sin- 

 uated, much roughened. Hemelytra slightly flattened and 

 dilated at the humeral angles and gently curvedly sloping to the 

 rounded extremity ; entirelv coriaceous and linearly roughened 

 in acute elevations along the lines of the sutures; soldered into 

 one piece along a straight sulcate suture extending from the 

 caudal angle of the scutellum to the tip of the hemelytra; appar- 

 ently soldered to the scutellum as well; not entirely covering the 

 abdomen, the connexival segments being moderately visible 



