Mr. J. W. Slioeljotham's Notes on Collemlola. 431 



2. Ventral sac (tube) in fuU-growu animals ■^•ith tcarted icalls. 

 Antennoe always distinctly bent. 



i. Antennce bent betiveen the Zrd and 4th segments, 4th segment 

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

 segment without paired dorsal papillis. Corpus teuaculi at 

 the base of the rami without lateral appendage. Tracheae 

 present (always?). Geiiital and anal segment not fused. 

 Subfamily Sminthxjbin.^, 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. With or without empodial appendage. Mucroual 

 bristle absent. Tribe Boueletiellini, C. B., 1913. 



[Here also belongs the genus Coi-ynephoria, Absolon 

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

 which only differs by the absence of the enipodiuui 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 SmixXthuiuni, C. B., 1913. 



ii. Antennce bent betxveen the 2nd and Srd segments, 4th always 



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



dorsal papillae. Corpus teuaculi as in 1 (i. e. ^Sminthuridince). 



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



Subfamily Dicyrtomin^, C. B., 1906. 



The Genus Sira, Lubbock. 



In 1870, in his "Notes on tlie Thysauura — Part 4/' 

 Lubbock described several Collenibola new to the English 

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

 called Sira {Seira). In his monograph, three j^ears later, 

 he described several species uuder Sira, including 



S. domestica (Nic). 

 S. nigromac'iilata, Lbk. 

 S. buskii Lbk. 



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

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

 leaving the name Sira for those like nigromacidata 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. 



