192 OETHOPTEEA. 



metathorax provided above at the hind edge with a series of four or five short prominent longitudinal 

 carina}, which are apparent also on the first and second abdominal segments. Legs moderately large or 

 small; the hind femora considerably shorter than the abdomen, the pinnae of the outer face few and 

 mostly composed of the lower row, the upper ones being irregular and nearly obliterated ; hind tibiae 

 with 11 spines on the inner row and 13 on the outer row. Mesosternal lobes very widely separated, the 

 inner margin of the lobes themselves broadly and obliquely rounded. Yalves of the ovipositor exserted, 

 rather coarse and nearly straight, provided on both the outer and inner edges with coarse teeth or 

 crenulations. 



l. Tanaocerus koebelei, sp. n. 



General colour pale cinereo-testaceous or rufous, varied on the sides of the abdomen and pronotum, on the 

 dorsum of the mesothorax, on the middle of the abdomen, and on the legs with fuscous and black. 



Occiput more or less transversely rugose and provided with a faint longitudinal carina that fades away in the 

 posterior end of the sulcus of the vertex. Yertex in front provided with two short, converging carina?, 

 which branch from the walls of the frontal costa and fastigium, where the two meet, these short carinas, 

 however, do not quite unite at their apices. Frontal costa prominent, but narrow, deeply sulcate. 

 Antennas with the two basal joints heavy, the others very slender and elongate, four or more times as 

 long as broad, alternately pale and obscure, nearly twice as long as the head and pronotum together. 

 Median carina of thorax finely sulcate. Dorsum of meso- and metathorax lapping over the pleurites and 

 with the lower posterior portions broadly rounded. Insect entirely apterous. Hind femora triannulate 

 with fuscous, the bands most pronounced across the upper edge ; hind tibiae testaceous ; anterior and 

 middle femora and tibiae each biannulate with fuscous. All the legs, the hind tibiae especially, rather 

 strongly hirsute. 



Length of body, $ , 18-23 ; of antennae 11, of pronotum 3-1, of hind femora 9 millim. 



Hah. Noeth America, Panament Valley, California (A. Koehele, in U.S. Nat. Mus.). 



Two females, captured in the month of April. This remarkable insect bears a 

 striking resemblance in many respects to the African genus Eneremius, Saussure, and 

 is so very different from the three other N.-American Eremobiine genera that one 

 cannot help but wonder whether there are still others to be met with in the desert 

 regions of the South-western United States and Northern Mexico.] 



BEACHYSTOLA, Scudder. 



Brachypeplus, Charpentier, Orthopt. descr. et pict., fasc. ix. (1841-1845) ; Girard, in Marcy's 



Expl. Red Riv. p. 231 (1854) (nee Erichson). 

 Brachystola, Scudder, Bull. U.S. Geol. Surv. Terr. ii. p. 267 (1876) ; Saussure, Prodr. (Edip. 



p. 240 (1884). 



The representatives of this genus are mostly confined to the arid regions of Middle 

 and Northern Mexico and the south-western portions of the United States. Judging 

 from the rather large number of species represented by the small amount of material 

 at hand from the former country, there is scarcely any doubt but that additional forms 

 will come to light when Mexico has been more carefully examined. A considerable 

 percentage of the species seem to be rather restricted in their distribution. The 

 subjoined table will aid in their separation. 



