Carpenter — The Apterygota of the Seychelles. 15 



they form a proximal row of three and a distal row of two. The cuticle of 

 the papilla has a roughened, wrinkled surface, and is protrusible from a 

 sub-cylindrical projection of the general firm cuticle of the appendage. 



In the examination and delineation of the insects of this genus I grate- 

 fully acknowledge some valuable help from my colleague, Miss A. J. Eeilly, 

 A.E.C.Sc. 



The three species of Acrotelsa from the Seychelles may he distinguished 

 thus : — 



A. Large, indoor species, over 15 mm. No dorsal combs of bristles 



on thoracic terga, A. collaris (Fab.). 



B, Small species under 12 mm. A pair of dorsal "combs " on each 



thoracic tergum. 



a. Inner process of ninth abdominal sub-coxa very long, 



A. elongata, sp. nov. 

 h. Inner process of ninth abdominal sub-coxa of normal 



length, A. Scotti, sp. nov. 



Acrotelsa collaris (Fab.). 



This widely distributed species — the common house-lepismid of the 

 tropics— has already been recorded from the Seychelles (Escherich, '04, 

 p. 108). It is found in both hemispheres, and there can be little doubt that 

 its wide range is largely due to commercial importation. The presence of 

 sensory papillae on the terminal segment of the labial palp has already been 

 mentioned. The insect has been well figured by Oudemans ('90, PL VI, 

 fig. 1) and Eschericb ('04, PL I, fig. 3). 



Localities. — Seychelles: Bird Island (1 male, 1 female); Mahe: Port 

 Victoria (3 specimens, dried and carded, 1908-9), Eound Island (1 specimen, 

 dried, July, 1908). Goetivy Island (3 specimens, dried and carded, 1905). 

 Aldabra: Pioard Island (1 male, 1 female, January, 1909). 



Acrotelsa elongata sp. nov. 

 (Plate VII, figs. 83-90.) 



Body-form elongate, narrow. Terminal segment of labial palp (figs. 88, 89j 

 broad and sub-globose with five , sensory papillae. Each thoracic tergum 

 with a dorsal and ten lateral " combs " of bristles on each side. Abdominal 

 terga ii-viii with a dorsal and a marginal " comb " on each side. Tenth 

 abdominal tergum acuminate, longer than broad, with four marginal " combs ' 

 on each side (fig. 83). Inner processes of ninth abdominal sub-coxa very 

 elongate, their tips almost reaching the extremity of the ovipositor (fig. 90). 



