149 



erous small spines, those on the outer carina double the size of those on 

 the inner. Hind tibife straight, much longer than the corresponding 

 femora. 



Measurements : Male— Length of body, 26 mm.; of pronotum, 6 mm.; of 

 front femora, 12 mm.; of antennae, 100 mm.; of hind femora, 23 mm.; of 

 hind tibiae, 27 mm. Female — length of body, 23 mm.; of pronotum, 5.5 

 mm.; of front femora, 11 mm.; of hind femora, 21 mm.; of hind tibia?, 24 

 mm.; of ovipositor, 14 mm. 



These measurements are much greater than those given by Mr. Scud- 

 der, but otherwise the specimens agree with his description in every re- 

 spect. 



Two males and one female of this large and handsome Ceuthophilus were 

 ta ken by Mr. W. P. Hay from a small cave in Crawford county and kindly 

 presented to me. It evidently inhabits only the smaller caves as Mr. Hay 

 saw no specimens in Wyandotte, and Mr. Scudder, in the Proc. Bost. Soc, 

 says of the original types taken in Kentucky: "Though careful search 

 was made in the larger cave, a mile or more in extent, no Raphidophonv 

 were found, but in the remotest corner of the small cave, a few hundred 

 feet only in extent, in a sort of hollow in the rock, not particularly moist, 

 but having only a sort of cave dampness, the stygia was found plentifully 

 these were also found exclusively upon the walls. Even the remotest 

 part of the cave is not so gloomy but that some sunlight penetrates it." 

 Dec ticidin.k. 



In the western states this sub family is represented by several genera 

 and a large number of species, but east of the Mississippi River there are 

 but two species of a single genus belonging to it, both of which are found 

 in Indiana. 



IX. Tiiykeoxotis, Serville (1839). 



These are Locustidte of large size with the pronotum extending back 

 over the first joint of the abdomen, thus forming a buckler or shield for 

 the back. Face broad, rounded, but slightly oblique. Eyes. small, sub- 

 globose. Vertex with a blunt decurved projection between the antenna- 

 which is slightly excavated on the sides. Pronotum truncate in front, 

 rounded behind, flattened above, bent abruptly downwards on the sides. 

 Prosternum armed with two short, blunt spines. Tegmina of the females 

 rudimentary, wholly covered by the pronotum ; those of the males fairly 

 well developed, extending in our most common species 5 mm. back of the 

 pronotum. The shrilling organ, which is covered by the pronotum, is 



