14 OKTHOPTERA. 



I am unacquainted with this species, but according to Bolivar's description it is even 

 smaller than P. aztecus. It was described from a female from Guatemala. 



8. Paratettix aztecus, Sauss. 



Tettix azteca, Sauss. Rev. et Mag. Zool. 1861, p. 400 \ 



Paratettix aztecus, Bolivar, Ann. Soc. Ent. Belg. xxxi. p. 282 2 . 



Total length, tf 7-5-11-3, $ 9-3-13-5 : pronotum, 6 5-6-8-7, ? 8-11; post, fern., tf 3-7-4-5, $ 4-5-6; 



antennae, 6 3, $ 3 ; pronotum beyond post, fern., $ 0-2, $ 0-5-2 ; wings beyond pronotal process, 



6 0-8-1-8, $ 0-3-1-7 miUim. 



Hab. North America, Arizona, California 2 . — Mexico 1 2 , Northern Sonora (Morrison), 

 Villa Lerdo in Durango (Hoge), Tepic, Orizaba (coll. Bruner), Acapulco, Atoyac, Teapa 

 (H. H. Smith), San Lorenzo, near Cordova (M. Trujillo). — Antilles, Cuba 2 . 



A very graceful little insect, presenting considerable variation in size and stoutness 

 of body. This species, and probably also the preceding, P.fallax, fall into the genus 

 TelmatetMx, recently proposed by Hancock [Psyche, ix. p. 7 (1900)]. 



Group BATRACHIDE^. 

 PLECTRONOTUS, gen. nov. 



Nearly allied to Tettigidea in general structure, but differing from it in the form of the facial costa, the minute 

 elongate elytra, and, especially, in the structure of the pronotum, which is coarsely scabrous, with the 

 posterior sinus of the lateral lobes all but obsolete and the posterior angles a little reflexed. Type 

 P. scaler, described below. 



1. Plectronotus scaber, sp. n. 



Antennae 21-22-jointed, slender, filiform, about reaching the base of the hind femora. Eyes of moderate size 

 prominent. Vertex scarcely ( <5 ), or one and one-half times ( $ ), as wide as one of the eyes, truncate in 

 front, the mid-carina of moderate size and but little produced backward ; the front margin transversely 

 carinulate, the cannula? and surface immediately behind them slightly 

 depressed. Crown horizontal. Facial costa rather broadly sulcate, 

 the margins sinuous, approximated below the points of insertion of 

 the antenna? ; in profile, strongly convex opposite the lower margin 

 of the eyes, moderately concave opposite the middle of them. Pro- 

 notum tectiform, very coarsely scabrous, granulate ; the front margin 

 advanced, with concave sides and uncinate apex extending to the end of 

 the mid-carina of the vertex, a little behind the level of the front of 

 the eyes ; the hind process abbreviated, its sides convex, apex acute ; 



lateral lobes rather deep, the posterior angles acute, somewhat rounded at the tip and turned a little 

 outward, the posterior sinus barely indicated ; mid-carina subcristiform, sinuate, depressed at the shoulders, 

 elevated and subcompressed in front of them ; lateral carina? well-developed, coarsely granulate-tuberculate 

 on the humeral angles, which are very obtuse. Elytra minute (less than 1 millim. in length), elongate, 

 rounded at the apex, the lower margin pale yellow. Legs much as in Tettigidea, but somewhat less stout; 

 pulvilli of first joint of hind tarsi small. 



Total length, S 9, $ 12 : pronotum, <$ 7, $ 10 ; post, fern., S 5-5, $ 7 : antenna?, d 1 5-5, $ 6 ; post, 

 fem. beyond pronotum, S 1'5, $ 1*5 millim. 



Hab. Costa Rica, Cache (Rogers). 

 One pair. 



