BOOPEDOK— PLECTEOTETTIX. 99 



apex of each eye to the pronotum, where it marks the position of the lateral carina to the hind margin 

 of the same. Abdomen, above and at the tip, infuscated. Hind femora testaceous, with two complete 

 internal bands, and one and part of a second externally ; the apex, and the base of the tibise also, black. 

 The latter with a broad, pale, basal annulus, followed by a dusky patch shading into red apically. 

 Length of body, 6 21, $ 27; of antennae, <J 12-5, $11; of pronotum, <$ 4-5, $ 5*6; of tegmina, 

 S 8-5, $ 5 ; of hind femora, <J 13, $ 17 millim. 



Hab. Mexico, Durango or Sinaloa (Forrer : $ ), Tepic (coll. Calif. Acad. Sciences : <s ). 



In its general appearance this insect approaches some of the Stetheophymae of the 

 Oriental region, but certainly belongs to the genus Boopedon as at present accepted. 



PLECTROTETTIX, McNeill. 



Stenobothrus (Plectrophorus), Saussure, MSS. 



Stenobothrus (Rammatocerus) , Saussure, Rev. et Mag. Zool. xi. p. 317 (1861). 

 Scyllina, Stal, Recens. Orthopt. i. p. 94 (1873) (part.) . 



Plectrophorus, McNeill, Proc. Dav. Acad. Nat. Sci. vi. p. 251, t. 4. figg. 21 a-c (1897). 

 Plectrotettix, McNeill, Psyche, viii. p. 71 (1897) ; Scudder, Gen. N. Am. Orthopt. p. 29 (1897) ; 

 Psyche, viii. p. 238 (1898) ; Cat. N. Am. Orthopt. pp. 27, 95 (1900). 



Until specimens of Scyllina peragrans, Stal, can be examined and compared with 

 the various species now before the writer, it is a difficult matter to state definitely the 

 relationship which exists between the various forms. Perhaps there are two, or even 

 three, distinct genera represented amongst the material now at hand. If so, they are 

 very closely related and shade imperceptibly one into another. For the present the 

 best course is to leave all the species with which we are now concerned under 

 Plectrotettix, with the synonymy suggested by the subdivisions of the following 

 Table *. 



Table for separating the Species of Plectrotettix and others of the Scyllina-gro^ f. 



A 1 . Tegmina less densely reticulate, the post-radial area provided 

 with two rows of cells and an intercalary vein ; frontal costa 

 not especially tumescent ; anterior and posterior lobes of the 

 pronotum subequal in length [Scyllina, Stal.] 



* That of Scyllina and Pseudostauronotus would work out as follows : — 



SCYLLINA, Stal. 



Gomphocerus (Epacromia), Stal, Freg. Eug. Besa, Ins., Orthopt. p. 343 (1860). 



Scyllina, Stal, Eecens. Orthopt. i. pp. 94, 112 (1873) ; Brunner, Eev. Syst. Orthopt. p. 123 (1893). 



PSEUDOSTATJEONOTUS, Brunner. 



Pseudostauronotus, Brunner, Eev. Syst. Orthopt. p. 123 (1893) ; Giglio-Tos, Zool. Jahrb. viii. p. 808 (1894) ; 

 Boll. Mus. Zool. Torino, xii. do. 301, p. 3 (1897). 



t Without doubt Qryllus cyanipes, Fabr. [Syst. Ent. p. 292 (1775)], belongs to this group, but the 

 description is so brief that it would apply equally well to any one of four or five of the forms tabulated by me. 

 Then, too, his reference "Habitat in America" is indefinite, as both North and South America possess 

 representatives of this section. 



Oo2 



