Smithsonian miscellaneous collections . lvulae, and each is supported on the distalmargin of the lateral tergite of the ninth segment (IXT), to whichit is articulated ventrally (E) by a condyle of the latter. Below andbetween the bases of the dorsal valvulae are two small intermediatesecond valvulae (E, ^Vl), united at their bases bv the anterior inter- GRASSHOPPER ABDOMEN SNODGRASS 45 valvula (aiv). Both anterior and posterior intervalvulae (E, aiv, piv)are present in Rhipipteryx as in Acrididae and Tetrigidae, and a smallmedian sclerite (/) before the anterior intervalvula gives attachmentto
Smithsonian miscellaneous collections . lvulae, and each is supported on the distalmargin of the lateral tergite of the ninth segment (IXT), to whichit is articulated ventrally (E) by a condyle of the latter. Below andbetween the bases of the dorsal valvulae are two small intermediatesecond valvulae (E, ^Vl), united at their bases bv the anterior inter- GRASSHOPPER ABDOMEN SNODGRASS 45 valvula (aiv). Both anterior and posterior intervalvulae (E, aiv, piv)are present in Rhipipteryx as in Acrididae and Tetrigidae, and a smallmedian sclerite (/) before the anterior intervalvula gives attachmentto a pair of convergent muscles (5). The lateral apodemes of the ovipositor of Rhipipteryx are longspatulate plates arising between the bases of the valvulae, but each ismore specifically connected with the corresponding ventral valvula(fig. 19 D, Ap), rather than with the dorsal valvula as in describes the ovipositor apodemes of R. forcipata as shelf likeextensions of the lower edges of the ninth tergum, having the same. tQ.—Abdomen and ovipositnr (jf Rhipipteryx biollcyi. A, terminal half of abdomen with ovipositor. B, lateral view of eighth seg-ment removed from seventh. C, left view of ninth segment and ovipositor. D,mesal view of right ventral valvula, with right apodeme and muscles. E, ven-tral view of ninth tergum supporting second and third valvulae. F, dorsal viewof tenth and eleventh segments, showing lobes (papfl) of paraprocts. (Letter-ing as on fig. 17.) relation to the vahulae as the free apodemes of Acrididae. The writer,however, finds no tergal connections of the apodemes in R. biollcyi,in which the structures appear to be identical with the intervalvularapodemes of Acrididae. They give attachment to muscles very nearlythe same as those of the Acrididae in their distribution to the basival-vulae (fig. 19 C. D. /). the ventral valvulae (_). the ninth tergum(C, 5), and the dorsal valvulae (C, E, 4). THE FEMALE GENITAL AND THE SPERMATHECAL
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