﻿80 PRO. GEORGE H. CARPENTER — A NEW WEST AFRICAN SPRINGTAIL. 



Isotoma (Isotomina) fasciata, sp. nov. (figs. 1-$). 



Length *7 mm. Feelers as long as head ; second and fourth segments sub- 

 equal, third somewhat shorter. Eight ocelli on each side, the inner anterior two 

 larger than the others ; post-antennal organ broadly oval, slightly less than a 

 large ocellus in diameter (fig. 2). Front foot with one tenent hair (fig. 4), hind- 

 foot with two (fig. .5). Foot-claw untoothed, slender and slightly curved ; em- 

 podial appendage short, tapering, with very narrow lamella. Fourth abdominal 



Isotoma fasciata, sp. nov. 

 (1) side-view of insect, X 75 ; (2) ocelli and post-antennal organ of right side, X 470 ; 

 (3) mandible, X 470 ; (4) tip of fore-foot with claw, X 470 ; (5) tibio-tarsus of hind leg, 

 X 470 ; (6) catch, x 470 ; (7) dens and mucro, side-view, X 470 ; (8) dentes and 



mucrones, dorsal view, X 470. 



segment 1£ times as long as third (fig. 1). Catch with bristle, on basal segment 

 (fig. 6). Spring with dens and mucro nearly half as long again as manubrium 

 (fig. 1). Mucro short, with terminal, dorsal, and lateral upturned teeth (figs. 7, 8). 



Colour white, with bright blue transverse bands on the thoracic and abdominal 

 segments, and blue markings on the feelers and head. 



Southern Nigeria: Benin; numerous specimens collected by Dr. R. W. 

 Gray, June 1910. 



Types in the British Museum. 



