PLECTEOTETTIX. 



101 



3. nobilis, Walk. 



d 2 . Hind tibiae with the basal portion flavotis, the apical 

 third but faintly bluish, usually with 15, and some- 

 times 16, spines in the outer row. Upper edge of 

 the hind femora crossed by dusky bands. [S. Mexico 



and Central America.] 2. calidus, sp. n. 



. Tegmina with the dark and light markings mostly confined 



to the disc. 

 d l . Hind femora with the lower edge red, the hind tibiae 



also mostly of this colour. [Oaxaca.] 



d 2 . Hind femora with the lower edge blue or testaceous, 



the hind tibiae for the most part purplish or testaceous. 



e 1 . Insect in great part green. The mottlings in the 



disc of the tegmina rather irregular. [Central 



plateau of S. Mexico.] 



e 2 . Insects largely testaceous. 

 f 1 . Larger. The disc of the tegmina black, crossed by 

 a few white blotches. Hind tibiae on the apical 



half bluish-tinted. [Orizaba.] 



/ 2 . Smaller. The disc of the tegmina scarcely crossed 

 by white blotches. Hind tibiae uniformly luteous. 

 [California?] 



4. excelsus, sp. n. 



5. macneilli, sp. n. 



[6. patrice, Scudd.] 



1. Plectrotettix viatorius, Sauss. 



Stenobothrus (Rhammatocerus) viatorius, Sauss. Rev. et Mag. de Zool. xi. p. 317 (1861) '. 

 Stenobothrus viatorius, Walk. Cat. Dermapt. Salt. Brit. Mus. iv. p. 756 (1870) 2 ; Thomas, Syn. 



Acrid. N. Amer. p. 206 (1873) 3 . 

 Scyllina viatoria, Stal, Recens. Orthopt. i. p. 112 (1873) 4 ; Bruner, Bull. Lab. Nat. Hist. Univ. 



Iowa, iii. pt. 3, p. 64 (1895) 5 . 

 Plectrophorus viatorius, McNeill, Proc. Dav. Acad. Nat. Sci. vi. pp. 252, 253, t. 4. figg. 21, 21 a-c 



(1897) 6 . 

 Plectrotettix viatorius, Rehn, Trans. Amer. Ent. Soc. xxvii. p. 95 (1900) 7 . 



Hal. Mexico 1_7 , eastern slope. 



This insect is exceedingly common in some portions of Eastern Mexico, where it at 

 times becomes a pest to cultivated crops. Saussure's type, a female, is before me as I 

 write. Although quite variable in colour, the species is readily separable from the 

 other forms by the characters mentioned in the synoptic table. 



2. Plectrotettix calidus, sp. n. 



This form is variable in colour, but is never in great part green or testaceous. It differs from P. viatorius, 

 its nearest ally, in the larger size, the comparatively longer hind femora and wings, and the generally 

 darker coloration ; the hind femora have the upper edge, as well as the outer disc, crossed hy dusky 

 hands ; and the hind tibiae, as a rule, are also provided with one or two more spines in the outer row— 

 the number varying from 14-16, instead of 13 or 14. 



