Smithsonian miscellaneous collections . d will be described later. The first sevenpairs of spiracles lie in the lateral membranous areas of the dorsumbeneath the edges of the terga, where some of them may be contained SMITHSONIAN INITSCKLLANEOUS COLLECTIONS \OL. 94 ill narrow laterotergal sclerites (E, Itg). The spiracles of the eighthsegment He in the lower parts of the tergum of this segment ( A). The median sternal plates of segments // to VI or F// areflanked by narrow laterosternites (fig. 2 E, 1st) and the sterna overlapthe edges of the terga, the laterosternites being inflected. I
Smithsonian miscellaneous collections . d will be described later. The first sevenpairs of spiracles lie in the lateral membranous areas of the dorsumbeneath the edges of the terga, where some of them may be contained SMITHSONIAN INITSCKLLANEOUS COLLECTIONS \OL. 94 ill narrow laterotergal sclerites (E, Itg). The spiracles of the eighthsegment He in the lower parts of the tergum of this segment ( A). The median sternal plates of segments // to VI or F// areflanked by narrow laterosternites (fig. 2 E, 1st) and the sterna overlapthe edges of the terga, the laterosternites being inflected. In Tridacty-lus and Rhipipteryx a small internal vesicle opens by an external pore(E, 3;) on the laterosternite of the third segment. According to Car-pentier (personal communication) a similar anterior vesicle opens onthe laterosternite of the second segment in Rhipipteryx terminal segments of the tridactylid abdomen have many peculiarfeatures, as will be shown in the description of the genital organs; but atg acs AN 2Ph. Fig. 3.—Relation of the phragmata to the segmental plates of the Carolina. A, vertical section of dorsum of metathorax just to right of median plane,showing the antecostal sutures {acs) and phragmata {sPh, sPh) marking thetrue intersegmental lines; the dorsum is occupied by a wing-bearing plate, thealinotum {), and a postalar postnotum (PNs) equivalent to the acrotergite(atg) of the alinotum. B, posterior view of the first abdominal tergum, thelobes of the third phragma, and the right tympanal capsule. the well-developed ovipositor of Rhipipteryx (fig. 19 A, Ovp) issurprisingly similar to the ovipositor of Tetrigidae and male organs, on the other hand, have no resemblance whateverto those of Acrididae or to those of Tetrigidae. The abdominal terga of the Acrididae, except the tergum of thefirst segment, are siinple plates with no sutural divisions (fig. i).The dorsal muscles arise on each tergum some distan
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
