16 Proceedings of the Royal Irish Academy. 



The feelers, eerei, and tail-process are mifoitimately veiy imperfect in all 

 the specimens. 



Length, 9 mm. Colour, pale with brown scalding : feelers, eerci, and tail- 

 process dark-ringed. 



LocalUics.—Mda\iVA (1908, eolL J. C F. Fryer, five females). 



This species is veiy closely allied to the Xorth Anstmliau A. lyroducta 

 Escherich ('04, pp. Ill, 112) with which it agrees in the immensely elongate 

 uluth sub-eoxal processes. A. produeta, however, has a much nanower 

 tei-minal s^ment to the labial palp, and a tenth abdominal tei-gum that is 

 shorter than broad (Escherich 1. c, fig. 45). It is remarkable that this most 

 abnormal foi-m from Aldabra should have its nearest ally on the Australian 

 continent 



Some notes on the jaws of this Acrotelsa may be of interest. The maiidiblc 

 (figs. 84, 85) is relatively longer and narrower than in Isolepisma (see fig. 75), 

 and more convex externally than in Ctenolepisma (Escherich, 1904, Plate II, 

 fig. 26). In the group of fine spines at the molar area and the bifid biistles 

 just proximal thereto this mandible agrees with those of Lepisminae generally. 

 The maxilla fig. 86 calls for little remark ; the somewhat acuminate tip of 

 the galea projects well beyond the lacinia, which has the inner edge, just 

 proximate to the apical tooth, serrate, with seven delicate lanceolate " comb " 

 teeth, and armed with sis prominent bristles (fig. 87). The labium (fig. 88) 

 has the sub-mentum, mentum, and lobes veiy broad, as well as the terminal 

 segment of the palp, along the edge of which are five oval sensory papillae 

 in a row (fig. 89 s. p.). 



Acrotelsa Scotti sp. nov. 



(Plate A^III, figs. 91-100.) 



Body-form elongate, narrow. Terminal segment of labial palp (fig. 98;?), 

 broad and sub-globose, arranged with five sensory papillae (fig. 99 s. j}.). 

 Each thoracic tergum with a dorsal and twelve lateral " combs " of biistles on 

 each side. Abdominal terga ii-\Tii with a dorsal and a marginal " comb " on 

 each side. Tenth abdominal tei-gum acuminate, longer than broad, with four- 

 marginal " combs " on each side (fig. 91). Inner process of ninth abdominal 

 sub-coxa moderately long, surpassing the tip of the relatively short o\'ipositor. 

 Gonapophyses slender, cylindrical, feebly segmented (fig. 95). 



As with the pre™us species, the few specimens are all very imperfect as 

 regards feelers, cerci, and tail-process. 



Length, 11 mm. Colour-, pale with brown scaling. 



Localities. — ^Aldabra : lie Esprit and Takamaka (November, 1908, four 

 females, J. C. F. Fryer, coll.). 



