MELAKOTETTIX.— STENOBOTHRUS. 91 



the joints somewhat flattened. Pronotum a little broader behind than in front, the disc angulate on 

 the posterior margin, rounded in front ; lateral carinse slender on the anterior lobe, arcuate and closely 

 approaching back of the middle, much heavier and greatly diverging on the posterior lobe ; sides about 

 as high as long, the front edge rounded, the posterior edge broadly hollowed out and the lower sinuate, 

 with a moderately broad, raised, smooth, white patch extending obliquely forward and upward into the 

 disc from the lower hind corner. Tegmina strongly abbreviated, the costal and dorsal edges broadly 

 rounded, the latter not quite attingent, the apices somewhat acuminate. Apex of the abdomen short and 

 blunt ; cerci of the J moderately long and slender, directed gently upward and backward, tapering on 

 the basal half, nearly equal beyond and gently bowed inward ; supra-anal plate triangular, about as long 

 as broad, the apical half gently bent downward. Posterior femora rather long and moderately robust, 

 extending about one-third of their length beyond the tip of the abdomen, the spines on the inner edge 

 much longer and heavier than those on the outer row, the latter ten in number. 



1. Melanotettix dibelonus, sp. n. (Tab. I. figg. 16, 16 a, s .) 



General colour of the sides of the head, pronotum, pleura, abdomen, legs, and antennae, as well as that of the, 

 pectus and venter, coal-black. Occiput, disc of pronotum, save a small triangular patch just inside of 

 the lateral carinse on the hind lobe, and a band of equal width along the dorsum of the abdomen to the 

 base of the supra-anal plate, brownish-testaceous. Dorsal edges of tegmina pale, with a greenish tinge. 

 Eyes dull ferruginous. Palpi and the raised oblique smooth patch on the sides of the pronotum white. 



Length of body, ' <$ , 19 ; of pronotum 4-35, of tegmina 4*75, of hind femora 13 millim. 



Hab. Mexico, Acaguizotla in Guerrero 3500 feet (H. H. Smith). 



A single male, captured in the month of October. 



A very peculiar locust. Judging from its general obscure colouring, if not a denizen 

 of the forest, it must be confined in its distribution to shady localities. It would be 

 interesting to see the other sex, and also to know more definitely about the haunts of 

 the species and the probable cause of the peculiar black tint. 



[STENOBOTHKUS, Fischer. 



Stenobothrus, Fischer, Orthopt. Eur. p. 313 (1843) ; Brunner, Prodrom. Eur. Orthopt. p. 100 (1882) ; 



Rev. Syst. Orthopt. p. 122 (1893) ; Morse, Psyche, vii. p. 327, fig. 12 (1896). 

 Gomphocerus, Stal, Recens. Orthopt. i. p. 93 (1873) (part.). 

 Gomphocerus, Bolivar, Orthopt. de Esp. p. 107 (1876). 

 Ghorthippus, Fieber, and Gryllus and Acridium, auct. 



This genus, which is so extensive in the eastern, is but poorly represented in the 

 western hemisphere. Of the three or four forms found in North America but one is 

 likely to occur in our region, viz. S. curtipennis. 



1. Stenobothrus curtipennis, Harris. 



Locusta curtipennis, Harris, Cat. Ins. Mass. p. 56 (1835) \ 



Locusta (Chloealtis) curtipennis, Harris, Treat. Ins. Inj. to Veg. p. 184, t. 3. fig. 1 (1862) 2 ; Rathv. 



Rep. U.S. Comm. Agr. 1862, p. 368, fig. 28 3 . 

 Stenobothrus curtipennis, Scudd. Bost. Journ. Nat. Hist. vii. p. 456 (1862)*; Walk. Cat. Dermapt. 



Salt. Brit. Mus. iv. p. 754 (1870) 6 ; Thomas, Syn. Acrid. N. Amer. p. 91 (1873) 6 ; McNeill, 



Proc. Dav. Acad. Nat. Sci. vi. p. 261 (1897) \ 



Nn2 



