Mr. J. W. Shoebotham's Sotes on CoUemlola. 429 



i. Head obliquely prognathous. Antennfe inserted iu tLe 

 fiout half of the head. (Trachese absent.) Furcal seg- 

 ment without chitiu-ridges, to which are articulated the 

 basal sclerites of the furcula if these (the chitiu-ridges) 

 are present, Furcula seldom absent. Post-antenual organ 

 generally present. 

 * Subfamily IsoTOMrx^, Schffr., 1896. 



(Including the Isotomurini, C. B., 1906.) 



ii. Head hypognathous. Antennpe inserted in the middle of 

 the head. (Head tracheae present.) Furcal segment with 

 two stout chitin-ridges, which serve for the articulation 

 of the l)asal sclerite of the furcula. 



Subfamily Actaletin.^:, C, B., 1906. 



2. Third abdominal tergum considerably longer than the fourth, 

 all abdominal segments free. With longitudinally ribbed 

 scales. Post-antenual organ absent. Sensory setse present, 

 ciliated, Furcula always present. 



5. Family Tomocebid^ (Schffr., 1896). 



i. Dentes aunulated; mucro diminutive, without hairs. An- 

 tennal segments 3 and 4 about equally long. 



Subfamily Lepidophoeellin.e (C, B., 1906.) 



ii. Dentes not annulated, 2-segmented ; mucro longish, with 

 hairs. Third antennal segment striliingly elongated (this 

 annulated as well as the fourth). 



Subfamily Tomocerix^ (C. B., 1906). 



. Trochanteral organ pi-esent (on the trochanters of the hind legs). 

 Ventral edge of the claws as a rule with basal groove ("split"). 

 Hairs and scales (at least in part) ciliated. Fourth abdominal 

 tergum as a rule considerably longer than the third. Ciliated 

 sensory setae always present. Furcula always present. 



6. Family ENTOJiOBRYiDiE'(C.B., 1906). 



1. Dentes slender, annulated dorsally here and there. 3Iucro 



small. With or without scales. With or without eyes. 

 Empodial appendage with 4 wing-corners. 



Subfamily Entomobryix^ (C. B., 1906). 



i. Antenna 4-segmented, with undivided basal segments. 

 Tribe Entomobryini, C.B., 1906. 



ii. Antenna 5- or 6-segmented, with the first or first and second 

 segments secondarily divided into two. 



Tribe Ohchesellini, C. B., 1906. 



[Here also belongs, presumably, the Beteromuricinm of 

 Imms, 1912. The medial cercus described by Imma 

 should be nothing else than a peculiarly elongated supra- 

 anal valve,] 



2, Dentes not annulated, not, or only a little, tapered towards 



the end. 



i. Dentes without dorsal ciliated scales or ciliated spines, 

 dorsally and dorso-laterally (often completely all round) 

 uniformly haired ; if dental spines are present, then some- 

 times they are modified into biistles at the ends of the 

 dentes. Empodial appendage with 4 strong wing-corners. 



