. (^, Fig. 7. P. TIwmsoni ^ ; abdomen from below; eighth segment and hypopygium removed ; 6, sixth seg- ment with its ventrite, 7, seventh segment with its vertical ventrite, 6\, the narrow, here quite hidden, dorsal part of the sixth segment. there are only foiir not transformed segments, the fifth being quite short and not or slightly chitinized. After the normal segments foUow those which are transformed and constitute the exterior genitalia. The genitalia apparently form a large, roundish or conical knob at the end of abdomen with a smaller or larger, sometimes nearly or quite wanting apic
. (^, Fig. 7. P. TIwmsoni ^ ; abdomen from below; eighth segment and hypopygium removed ; 6, sixth seg- ment with its ventrite, 7, seventh segment with its vertical ventrite, 6\, the narrow, here quite hidden, dorsal part of the sixth segment. there are only foiir not transformed segments, the fifth being quite short and not or slightly chitinized. After the normal segments foUow those which are transformed and constitute the exterior genitalia. The genitalia apparently form a large, roundish or conical knob at the end of abdomen with a smaller or larger, sometimes nearly or quite wanting apical membraneous impression (fig. 5). On a closer examination we find on the left side below next to the large fifth dorsal segment a very small sixth segment, it is triangular and lies at the left hing corner of the fifth, (figs. 6, 7) but in reality it is present
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
