io 



OETHOPTERA. 



TETTIX, Latr. 



Tetrix, Latreille, Hist. Nat. Crust, et Ins. xii. p. 161 (1804). 



Tettix, Charpentier, in Germans Zeitschr. fur Ent. iii. p. 315 (1841) ; Bolivar, Ann. Soc. Ent. 

 Belg. xxxi. pp. 195, 257. 



It is with some doubt that I refer the two following forms to this genus, since they 

 seem in some particulars to be almost as closely related to Paratettix . It is possible 

 that further research may assign them a place distinct from either, but at present I am 

 reluctant to do so in the absence of sufficient material to justify that course. 



Key to Species. 



Pronotum convex on the shoulders in both sections, subulate ; mid-carina 



distinct behind the shoulders, but not elevated convexus, sp. n. 



Pronotum tectiform, abbreviated ; mid-carina elevated throughout, subcristiform 



anteriorly tectus, sp. n. 



1. Tettix convexus, sp. n. 



Antennae stout. Eyes small, globose. Vertex nearly twice as wide as one of the eyes, truncato-convex, a 

 little advanced ; mid-carina small, little produced. Facial costa rather widely sulcate, sides subparallel, 

 in profile advanced before the eyes, smoothly convex opposite the points of insertion of the antennae, slightly 

 concave above them. Pronotum truncate anteriorly, subulate behind, granose-scabrous, convex on the 

 shoulders in both sections ; the mid-carina elevated and subcompressed anteriorly, slightly depressed and 

 scarcely distinct on the shoulders, distinct but not elevated behind them. Wings caudate, passing the 

 hind process. Elytra oblong, rounded or subacuminate at the tip. Femora rather slender ; mid-femora 

 with both margins gently sinuate. Pulvilli of hind tarsi flat or rounded below, the second and third 

 equal. 



Total length, <$ 11-7, $ 12-5: pronotum, J 10-3, £ 10-10-7; post, fern., d 1 4-6, $ 5-5*4; antennae, 

 <J , 2 millim. 



Hab. Mexico, Mexico city (Bruner, F. D. Godman). 



A pair in Prof. Bruner's collection and a female obtained by Mr. Godman. This 

 is a peculiar species, bearing considerable resemblance to Paratettix rugosus, but 

 distinguished from it by the wider and somewhat advanced vertex, the smaller eyes, 

 stouter antennae, less robust form, and unexpanded middle femora of the male. 



2. Tettix (?) tectus, sp. n. 



Antennae stout, joints very short and broad. Vertex nearly twice as wide as one of the eyes, a little advanced, 

 truncato-convex, the mid-carina prominent. Eyes small, globose. Facial costa rather narrowly sulcate, 

 moderately protuberant, in profile convex opposite the points of insertion of the antennae, shallowly 

 excavate opposite the eyes. Pronotum obtusely tectiform, anterior margin truncate, apex cuneate, not 

 passing the hind femora; mid-carina elevated, subcristate anteriorly, depressed and sinuate on the 

 shoulders, undulate behind them. Anterior femora with the margins entire or slightly undulate. Middle 

 femora stout, the margins slightly sinuate, with three small lobes above and two below. Posterior femora 

 robust. Posterior tarsi with the pulvilli flat or rounded below. 



Total length, d 1 7-5-8, $ 8-3: pronotum, <$ 6-7-7'4, $ 7-4; post, fern., tf 4-5, $ 4-8; antenna, d, 

 2*5 millim. 



Hab. Mexico, Mexico city (Bruner, H. H. Smith). 



