MICHIGAN ACADEMY OF SCIENCE. 
161 
sharp, and on the metazona strongly arched, cut in front of the middle 
by a deep but narrow notch; lateral carinae rounded, cut by the prin- 
cipal sulcus and obsolete in front of it. Lateral lobes of pronotum 
deeper than long, the front margin vertical, the hind margin oblique. 
Tegmina broad, much exceeding the abdomen; the whole of apical third 
membranaceous. Inner wings long and wide, black, with a narrow yel- 
low outer border; the apex fuscous.”- — Blatchley. 
21. Dissosteira Carolina (Linnaeus). — The shape is described in the 
account of the genus. 
Color: — There is a wide variation in color, from light gray through 
browns and reds to fuscous; also the body and tegmina may be almost 
entirely without dots or marks of any kind, or may be thickly covered 
with dark dots or spots. The inner surface of the hind femora always 
has three black bars, separated by yellowish white; the apical third of 
the tegmina. is translucent; the inner wings are black, with a narrow 
yellow border, which is darkened at the apex by small fuscous spots. 
Measurements : — Length of body, male, 26 mm., female, 38 mm. ; teg- 
mina, male, 31 mm., female, 10 mm.; pronotum, male, 6 mm., female, 9 
mm. ; hind femora, male, 13 mm., female, 17 mm. 
Nymphs were found all through July. 
FAMILY LOCUSTIDAE. 
‘‘This family comprises those insects commonly called katydids, green 
or long-horned grasshoppers, and stone or camel crickets. 
‘‘The distinguishing characteristics of the members of the family are 
the long, slender, tapering, many- -jointed antennae ; the almost universal 
absence of ocelli or simple eyes; the four-jointed tarsi (excepting in the 
genus Dailiinia ) ; and the sword-shaped or falcate ovipositor of the fe- 
males, which is made of four flattened plates. The head in many of the 
species is wedge-shaped, and the mouth-parts are well developed, the 
mandibles especially being long and sharp-pointed. * * * The teg- 
mina, or wing covers, when present, slope obliquely downwards, instead 
of being bent abruptly, as in the Gryllidae, or true crickets; and in most 
cases, the wings are longer than the tegmina. 
‘‘The stridulating or musical organ of the males is quite similar in 
structure to that of the male cricket, being found at the base of Ihe 
overlapping dorsal area of the tegmina and usually consisting of a trans- 
parent membrane, of a more or less rounded form, which is crossed by a 
prominent curved vein, which, on the under side, bears a single row of 
minute, file-like teeth. In stridulating, the wing covers are moved apart 
and then shuffled together again, when these teeth are rubbed over a 
vein on the upper surface of the other wing cover, producing the fa- 
miliar sound. * * * The ear of these insects, when present, is also 
similar in structure and position to that of the cricket’s, being an oblong 
or oval cavity covered with a transparent or whitish membrane, and 
situated on the front leg, near the basal end of the tibiae.” — Blatchley. 
21 
