Mr. J. W. Shoebotham's Notes on Collemhola. 431 



2. Ventral sac (tube) in full-growu animals with warted walls. 

 Antennge always distinctly bent. 

 i. Antennce bent heticeen the Zrd and 4th sec/tnents, 4th segment 

 longer than the 3rd, the latter always undivided. Furcal 

 segment without paired dorsal papillaj. Corpus teuaculi at 

 the base of the rami without lateral appendage. Tracheae 

 present (always.'). Genital and anal segment not fu.sed. 

 Subfamily Sminthurin^, C. B., 1906. 

 * Tibio-tarsus at the distal end on the hind side with 2-3 

 (seldom with a 4th on the front side) more or less closely 

 applied clubbed hairs, not, or only little, over-reaching the 

 claws. "\\'ith or without empodial appendage. Mucronal 

 bristle absent. Tribe Bourletielli>;i, C. B., 1913. 



[Here also belongs the genus Corynephoria, Absolon 

 (1907), which is very nearly related to BourletieUa, and 

 which only differs by the absence of the empodium and 

 through the dorsal clavate appendage. It is doubtful also 

 whether it possesses tracheae ; abdominal sensory setae are, 

 however, present in normal numbers.] 



** Tibio-tarsus without the described clubbed hairs, having 

 instead sometimes outstanding, finely knobbed, clavate 

 hairs, Mucro with or without bristle. 



Tribe Sjiinthurini, C, B., 1913. 



ii. Antennce bent between the 2nd and 3rd segments, 4th always 



shorter than the 3rd. Furcal segment with one pair of 



dorsal papillae. Corpus tenaculi as in 1 (i. e. ^viinthuridince). 



Tracheae absent (always ?). Genital and anal segment fused. 



Subfamily Dicyrtomin^, C, B., 1906. 



The Genus Sira, Lubbock. 



In 1870, in his " Notes on the Thysauura — Part ■^," 

 Lubbock described several Collemijola new to the English 

 Fauna, and one formed, the type of a new genus which he 

 called Sira (Seira). In his monograph, three years later^ 

 he described several species uuder Sira, including 



/S. domestica (Nic), 

 S. nigromaculata, Lbk. 

 S. buskii Lbk. 



In later years the genus was split up, and. Schott proposed 

 the name Pseudosira for types like the iS. domestica (Nic), 

 leaving the name Sira for those like nigromaculata and buskii. 

 But this should not be so, for Lubbock expressly states that 

 domestica forms the type of his genus Sira. Therefore 

 Pseudosira must fall and Sira take its place, and for the 

 species hitherto included in Sira, I propose the new name 

 Willowsia \ 



' Named after my friend Mr, F. W. "Willows, of Tsolo, South Africa, 



