44 Proceedings of the Royal Irish Academy. 



Length 1 mm. Colour violet-blue ; ouly the head, the spring, and tlie 

 segmental junctions yellow. 



Localitu's. — Mahe : Eoret Noire, 2000 ft. (four specimens, October, 19U8}. 



Microparonella flava sp. nov. 

 (Plate XVIT, figs. 59-62.) 



Feeler twice as long as head, proportional length of its segments as 

 5:8:6:12 (fig. 5H). Eight ocelli on each side. Fourth abdominal segment 

 three times as long as third. Foot with slender tenent hair ; claw with very 

 prominent proximal and distal teeth ((ig. 60). Spring foui-Kflhs as long as 

 body, dens rather shorter than manubrium; mucro (fig. 6'^) relatively narrow, 

 with five teeth — a terminal, three dorsal, and a lateral. 



Length 1 mm. Colour yellow, except for the feeler and a few mottlings 

 on the head and abdomen, blue. 



Localities. — Mahe : Foret Noire, 1000 ft. (one specimen, October, 1008). 



This species is evidently nearly related to M. cacrulea, but the structural 

 differences are quite definite, as well as the colour-distinction. Tlie long, 

 cylindrical ventral tube is cbaracteristic in this genus as in Dicranocentruides 

 Imms; it is conspicuous in both the Seychelles species, and the large bilobed 

 sac is protruded in some of the specimens preserved (figs. 55-61). 



Cremastocephalus Seliotl (U'^OT). 

 Fkrikn/jda, Hitter (191'<;j. 



First described by Schott for a Mexican species ('97, p. 175), this genus 

 is now known to be well represented in the Eastern tropics. It is remarkable 

 among the Paronellini for the absence of scales on the body, the very long 

 feelers, the broadly laminate empodial appendages of the feet, and the 

 presence of a scale-like organ (tigs. 66-70 a) on the dens, close to tlie base of 

 the mucro. All these characters are distinctive of Hitter's genus Pterikrypta 

 ('12, p. 385), he having apparently overlooked Schott's paper. 

 The two Seychelles species may be distinguished thus: — 

 A. Mucro of spring thrice as long as broad, colour yellow with 



broad violet bands and streaks, C.'- Scotii. 



E. Mucro of spring less than twice as loaig as broad ; colour yellow 



with narrow lateral violet streaks, ... 0. ludlidus. 



Cremastocephalus Scotti sp. nov. 

 (Plate XVII, fig.s. 6?,-66.) 

 Feelers rather longer than whole body (including head and spring), 

 proportional length of anteunal segments as 4:9:7:f' (fig. Go). Eight 



