20 Proceedings of the Roi/al Irish Academt/. 



by Escherich ('04, text fig. 58, p. 131). I give now, however, a drawing 

 (Plate X, fig. 116) of the ventral view of the tenth abdominal tergnm, 

 showing how the stout spines are arranged around the latei'o-posterior edges 

 of the sclerite, and demonstrating also the conical apodemes (fig. 116 ajt) and 

 the muscles connected with the cerci and the median appendage. 



In the female the tenth tergum is simpler and relatively narrower 

 (fig. 120), without the stout spines that characterize the male, but carrying a 

 pair of long, terminal bristles. Tiie ovipositor of Lcpidospora Braucri 

 resembles that of L. Eschcrichii, which Silvestri has figured in outline. 

 The large sternum of the eighth segment (Plate X, figs. 117, 118, viii) has a 

 rounded hind maigin beset with strong bristles ; the sub-coxa is broad 

 (fig. 118^. c. 8), with tlie stylet inserted, as usual, in a notch near its inner 

 edge. The anterior gonapophysis or process of the ovipositor (figs. 117, 

 118,^0. 8j is large, broadly expanded in the middle, and with a blunt tip beset 

 with hairs and a few short spines. The sub-coxa of the ninth segment 

 (figs. 117, lis, s. c. 9), on the other hand, is narrow and elongate, constricted 

 centrally; the sub-coxa {s. c. 9) and the stylet together are nearly as long as 

 the gonapophysis {(jo. 9), which i.s narrower than the cori-esponding process of 

 the eighth segment, shows \Qvy imperfect jointing, and carries, near the tip 

 on the inner ventral aspect, a row of thick, curved processes, forming a co)nb- 

 like structure (fig. 119). lu a young individual in which no gonapophyses 

 can yet be distinguished, the stylets of the ninth segment are longer than 

 tho.se of the segments in front, and the sub-coxae are already prominent 

 ', Plate X, fig. 115). 



Tlie ovipositor of this species of Lepidospora is noteworthy on account of 

 the poorly developed jointing of the gonapophyses. Escherich has given 

 reasons for believing that this jointing, so apparent in the Lepisminae and 

 in Atelura, for example, is of a " false " and " secondary " nature. If this 

 view be accepted, the condition in Lepidospoi-a Braucri must be regarded as 

 primitive. It has already been pointed out that in L. gracilis Escherich and 

 in L. vicridlonalis Silvestri the gonapophyses of the female are long, with 

 oonspicnons jointing. 



Family lAPYGIDAE. 



The members of this family are easily distinguished from other Thysanura 

 by the transformation of the liindmost abdominal appendages into a pair of 

 forceps —a character which gives them the appearance of tiny earwigs. They 

 resemble, liowever, the Campodeidac and the Collembola in the structure of 

 their jaws, which are for the most part retracted into the head-capsule. The 

 typical genus iapy.x was establishetl long ago by Haliday ('64) for an Italian 



