The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . After Howard, Ent. Bull. 4. n. s. Dept. 4.—Egg-purse of American Cock-(fig- 3) or cockroaches roach (Periplaneta americana). Magnified.() form the second a_ Side view; b, end view; the outlinefamily of this division. c shows natural are readily dis-tinguished by the somewhat rounded prothorax beneath which thehead is usually concealed, while the forelegs are eggs are enclosed together in a compact capsule or purse (fig- 4)- MI. Saltaloria.—The three f
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . After Howard, Ent. Bull. 4. n. s. Dept. 4.—Egg-purse of American Cock-(fig- 3) or cockroaches roach (Periplaneta americana). Magnified.() form the second a_ Side view; b, end view; the outlinefamily of this division. c shows natural are readily dis-tinguished by the somewhat rounded prothorax beneath which thehead is usually concealed, while the forelegs are eggs are enclosed together in a compact capsule or purse (fig- 4)- MI. Saltaloria.—The three families included in this tribe aredistinguished by their elongate and powerful hindlegs (fig. 5) whichenable them to leap far and high. They are remarkable for theposecesion of complex e*n (described in the article Hexatoda) and ORTHOSTATAE—ORTOLAN 3+i. stridulating organs which produce chirping notes (see Cricket).The families are the Acridiidae and Locustidae—including the insectsfamiliarly known as locusts and grasshoppers () and the Gryllidaeor crickets (). The Acridiidae have the feelers and the ovipositorrelatively short, and possess only three tarsal segments; theirears arc situated on the first abdominal segment and the malesstridulate by scraping rows of pegs on the inner aspect of the hindthigh, over the sharp edges of the forewing nervures. The Locustidae (see Grasshopper,Katydid) have thefeelers and often alsothe ovipositor veryelongate; the foot isfour-segmented; theears are placed at thebase of the foreshinand the stridulation isdue to the friction of atransverse file be-neath the base of theleft forewing over asharp ridge on theupper aspect of theright. In some of theseinsects the wings areso small as to be uselessfor flight, being modi-fied altogether forstridulation. TheGryl-After Marlatt, Em. Bull. 4> n
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