14 Proceedings of the Roi/al Irish Academy. 



82s. c, 81) is elongate, acute, and spiny. The i^enis (fig. 80^je), as usual in 

 Lei^isma and allied genera, is short ; the ovipositor projects far beyond the 

 tip of the nin(;h abdominal stylets (fig. 82). 



Cteiiolepisma Escherich. 



This genus was founded by Escherich ('04, p. 75) to include Lepismidae 

 characterized by the possession of numerous " combs," of feathered bristles on 

 the thorax and abdomen, four being present on the greater number of the 

 abdominal terga, and by the rounded truncate or emarginate edge of the 

 tenth abdominal tergum. It includes a number of species, whose collective 

 range extends over the tropics and warmer temperate regions of the globe. 



Ctenolepisma longicaudata Escherich. 



A single female from b'^licite, Seychelles, 1908, is evidently referable to 

 this species, wliich Escherich described ('04, pp. 83-4, fig. 31) from specimens 

 found in houses in South Africa, and to which he referred doubtfully a 

 specimen from Guinea. The presence of the insect on the Seychelles 

 confirms his suggestion that it would be found widely distributed in the 

 Ethiopian Eegion. 



Acrotelsa Escherich. 

 This genus was established ('04, p. 105) for some Lepismids of relatively 

 large size, distinguislied from allied genera by the tenth abdominal tergLim 

 being long and pointed. Escherich includes this genus in the sub- family of 

 tlie Lepismatinae, among the diagnostic features of which (ojj. ciL, p. 36) he 

 mentions the absence of sensory papillae on the terminal segments of both 

 maxillary and labial palps, such sensory papillae being pi-esent in the 

 Nicoletiinae. In Isolepisma, and probably in most of JShe species of 

 Lepisminae, both maxillary and labial palps are without these papillae, and 

 so are the maxillary palps in Acrotelsa. But in the three species of 

 Acrotelsa from the Seychelles collection the labial palps have very con- 

 spicuous papillae on the terminal segment, and one of these species is 

 clearly identical with that described Ijy Escherich as Acrotelsa coUaris (Fab.). 

 Silvestri also has described some species of Lepsima with similar structures 

 ('13, pp. 8-11). It is necessary, therefore, to revise the diagnostic characters 

 of the Lepisminae, and to i-ecognise that in this feature members of the sub- 

 family may approach the Nicoletiinae. The sensory papillae of Acrotelsa are 

 shown in figs. 88, 89 {A. elowjata, sp. nov.), 98, 99 {A. Scotti, sp. nov.), and 

 101 {A. coUaris). In the two former species the five papillae are arranged in 

 a single row along the broad end of the terminal segment, while in A. cuUaris 



