So Proceedings of the Royal Irish Academy. 



tubercles bearing a sensory bristle dorsally. Abdominal dorso-lateral 

 tubercles rounded. 



Length 2'5 mm. Colour yellow. 



Localities. — Mahe: Cascade, 1000 feet (1908, 4 specimens). Silhouette 

 (1908, 2 specimens). 



Two recently described Oriental species, N. pudibunda ]mms ('12, pp. 86-7), 

 and N. dubiosa Eitter ('!'<;, p. 397), resemble iV. sexoculata in colour, in the 

 number of ocelli, and in the structui-e of the foot-claw. Imms and Eitter, 

 however, give no details as to the maxillae and the abdominal tubercles, on 

 which Borner ('06, pp. 167-9) has laid stress in distinguishing sub-genera in 

 this genus. But in N. 2}udihciida Imms, a specimen of which I liave lately 

 had an opportunity of seeing, the intermediate tubercles of the fifth 

 abdominal segment are fused with the dorso-lateral tubercles as in the 

 European iV. muscor^im Tempi. The simple maxilla, the distinction of the 

 intermediate from the dor<o-lateral tubercles of the abdominal terga, and the 

 presence of sensory bristles on each of these tubercles in N. se,roculata combine 

 to place the species in Borner's sub-genus Lobelia, founded for the reception 

 of a Japanese insect — Neanwra {Lobelia) Sautcri. Borner, however, describes 

 the dorso-lateral tubercles of the four anterior abdominal segments as 

 " zapfenartig " in Lobelia ; in our Seychelles insect they are rounded like the 

 other abdominal tubercles, so that in this character an approach to typical 

 Neanura (N. nmscorum Tempi.) is shown. 



The main features of the head and its appendages may be seen by 

 reference to the drawings (figs. 1-3). The cuticle is covered with strong 

 granulations, and bears three prominent sub-hemispherical bristle-bearing 

 tubercles on each side. The ocelli (fig. 1 oc) are imperfectly defined ; two 

 lie in front closely apposed, and one behind. In front of the two ocelli is a 

 smooth, cuticular area surrounded by strong granulations ; this seems to 

 represent a vestigial, post-antenual organ (fig. 1 ju.a.). The feelers are of the 

 short, stumpy build usual in Neanura; at the tip of the terminal segment (fig. 2) 

 may be seen retractile sensory pajjillae, near which are some sensory bristles 

 and short spines. The mandible (tig. 1 /mid) is long and slender ; its proxhnal 

 end evenly rounded, its tip blunt and toothless. The maxilla (fig. 3) has a 

 simple needle-like apex, near which is attached a delicate, pointed process 

 (p), which may represent the palp. The labium (fig. 4j consists of paired 

 elongate plates with somewhat serrate edge, borne on a median sub-triaugular 

 sclerite. 



The foot and its claw are of the type usual in the genus; no tooth can be 

 seen on the claw, but a minute slender vestige of the empodial appendage 

 (" inferior claw " of older authors) may be distinguished (fig. 5 cnqj.). The 



