Mn. J. W. Shoebotliam's JS^otes on CoUemlola. 429 



i. Head obliquely prognatbous. Antennte inserted iu the 

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

 ment without chitin-ridges, to which are articulated the 

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

 are present. Furcula seldom absent. Post-anteuual organ 

 generally present. 



Subfamily Isotomix.^, Schffr., 1896. 

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



ii. Head hypogoathous. Antennre inserted in the middle of 

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

 two stout chitin-ridges, which serve for the articulation 

 of the basal 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-antennal organ absent. Sensory setse present, 

 ciliated, Furcula always pre.seut. 



5. Family Tomocerid.i: (Schffr., 1896). 



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

 teunal segments 3 and 4 about equally long. 



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



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

 hairs. Third antennal segment strikingly elongated (this 

 annulated as well as the fourth). 



Subfamily ToMOCEEiNiE (C. B., 1906). 



b. Trochanieral organ present (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 ENToMOBRYiDiE (C. B., 1906). 



1. Dentes slender, annulated dorsally here and there. Mucro 



small. With or without^ scales. With or without eyas. 

 Empodial appendage with 4 wing-corners. 



Subfamily Ejntomobryin.e (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 IIetero7nuricin(s of 

 Imms, 1912. The medial cercus described by Imms 

 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 bristles at the ends of the 

 dentes. Empodial appendage with 4 strong wing-corners. 



