TETTIX.-— PAKATETT1X. 11 



Two males obtained by Mr. H. H. Smith and a female in Prof. Bruner's collection. 

 This species bears a striking resemblance in profile to Paratettix sinuatus, but the form 

 of the antennae, pulvilli, and vertex seems to bring it to this genus. The female has a 

 malformation of the pronotum in the shape of a convex elevation running transversely 

 across the middle of the hind process. 



PARATETTIX, Bol.* 

 Paratettix, Bolivar, Ann. Soc. Ent. Belg. xxxi. pp. 195, 270 (1887). 



This is the dominant genus of the group Tettigiae in subtropical countries, taking 

 the place of Tettix in more northern climes. Like Tettix and Tettigidea, it includes an 

 assemblage of forms approaching each other so closely as to tax the most critical eye. 

 This fact, accompanied as it is by individual and geographic variations, and usually 

 complicated by the lack of material in satisfactory series, makes the genus a most 

 perplexing one to the systematist. Of the eight species reported from Central America 

 I have seen all but two. There are doubtless others to be found ; nor is it impossible 

 that some forms here regarded as varieties, and provisionally referred to species, should 

 be given specific rank, while others may perhaps prove to be synonyms. 



Key to Species. 



A. First and third joints of posterior tarsi of equal length peruvianus, Bol. 



AA. First joint of posterior tarsi longer than third. 



B. Margins o£ the middle femora strongly sinuato-lobate. 



C. Middle femora very widely expanded, clypeate schochi, Bol. 



CC. Middle femora little expanded. 



D. Vertex equal to eye or a little wider, sometimes very slightly 

 advanced. Pronotum elevated at the shoulders ; mid- 

 carina elevated throughout, subcristate anteriorly. Middle 

 femora broad, strongly sinuato-lobate ....... toltecus, Sauss. 



DD. Vertex equal to eye or a little narrower, truncate ; eyes 

 more prominent. Pronotum rather flat on the shoulders ; 

 mid-carina less elevated, sometimes indistinct posteriorly. 



Middle femora not quite as broad mexicanus, Sauss. 



BB. Margins of the middle femora entire or nearly so. 

 E. Vertex wider than eye. 



F. Pronotum rather flat above, long-subulate; mid-carina 

 distinct, hut low, except in front of the shoulders, where 



it is subcompressed and elevated durus, sp. n. 



FF. Pronotum with the shoulders more elevated ; mid-carina 

 higher, acute, compressed throughout, subcristate in front 

 of the shoulders ; hind process abbreviated ..... sinuatus, sp. n. 



* Since these pages have been in type, the genus Paratettix has been divided into three by Hancock [Ent. 

 News, x. pp. 275-277 (Dec. 1899)], under the names Allotettiv, Paratettix, and Telmatettix. 



Cc2 



