( 543 ) 



XXXIX. 



TWO NEW SPECIES OF COLLEMBOLA EROM NYASSALAND 

 By GEORGE H. CARPENTER, D.Sc, M.R.I.A., 



Professor of Zoology in the Royal College of Science, Dublin. 

 (Plate LI.) 



[Read Januauy 2S ; published Apkil 16, 1919.] 



Some years ago Dr. G. A. K. Marshall, Director of the Imperial Bureau of 

 Entomology in London, was so good as to send me a number of small collec- 

 tions of. Collembola and Thysanura from various tropical regions of the 

 British dominions. Among these was a mass of small springtails, collected 

 at Port Herald, Nyassaland, on the 28th April, 1913, by Dr. J. E. S. Old. 

 The vast majority of the hundreds of specimens in this gathering belong to 

 a species of Isotomina, but there are a few examples of an Achorutes, allied 

 to the common European A, viaticus. Both these insects appear to belong 

 to undescribed species. 



COLLEMBOLA. 



PODURIDAE. 



Genus Achorutes Templeton. 

 Hypogastrura Bonier. 



Achorutes caduceator sp. nov. (PI. LI, figs. 1-10). 



Length 2mm. Eight ocelli on each side of head, post-antennal organ 

 with four acute prominences (figs. 2, 4), a distinct ovoid accessory post- 

 ahtennal area in front of ocellar patch (fig. 2). Foot with two tenent hairs, 

 claw with small inner tooth, empodial appendage with sinuate lamella and 

 tapering acute tip (fig. 7). Spring with dens as long as manubrium, two 

 and a-half times as long as mucro, which has an evenly curved ventral 

 edge, and a narrow dorsal lamella (figs. 9, 1 0). Bristles on trunk segments 

 straight (figs. 1, 8). Anal spines short, slightly procurved (fig. 8). Colour 

 deep blue-black. 



Locality : Port Herald, Nyassaland. 



Types in British Museum. 



SCIENT. PBOO. R.D.S., VOL. XV., NO. XXXIX. 4 Q 



