20 MB. E. J. MIEBS ON TUE IDOTEIDiE. 



developed and rnulti articulate flagellum. Palpi of the masilli- 

 pedes four-jointed, the last composed of two coalescent joints. 

 Epimera well developed and evident in a dorsal view, but not 

 greatly elongated, as in Glyptonotus. Legs with the dactyli more 

 or less reflexible, but with the penultimate joint not considerably 

 dilated as in Glyptonotii,s, Operculum with the basal plates 

 usually marked with a raised line running close to and nearly 

 parallel with the inner margins, but without an oblique line as 

 in Edotia *, each bearing at its distal end a strong plumose bristle, 

 which is concealed by the terminal opercular plate. 



The species of this genus are distributed throughout the world, 

 but occur but very rarely in the highest latitudes. 



Leach's designation of Stenosoma has been adopted by some 

 subsequent authors for certain species of Idoiea. The original 

 diagnosis, however, does not permit even of its being used for a 

 sectional designation in the present revision. Leptosoma, on the 

 other hand, will include all Idotece with a uniarticulate postab- 

 domen. Armida of E-isso may probably include the typical Idotece 

 with three-jointed postabdomeu and indications of a fourth, 

 partially coalescent, segment, although he says, " abdomen quadri- 

 articiUatus.^' 



The genus Hebe, included by Eisso among his Idoteadees, is 

 obviously very inaccurately characterized ; but on account of the 

 short antennae and subulate postabdominal appendages can hardly 

 belong to any of the European members of this family, but may 

 perhaps be referred to the Anthuridce, In the single species 

 (S". punctata) the third pair of legs are three times as long as the 

 rest. 



I. Fostabdomen composed of four or Jive distinct segments, visible 

 in a dorsal vieiv. {Species small or minute, with a few- 

 jointed antennal flagellum.') Zenobia ? 



This section is established provisionally for certain species, two 

 of which are of minute size, and may possibly be young forms ; 

 but as I have not seen any young examples presenting similar 

 characters, I have thought it better, for the present at least, to 

 consider them distinct. Eisso, it may be noted, makes no men- 

 tion of the few-jointed antennal flagellum in Zenobia ; but this 

 character exists in specimeus, which I have scarcely any doubt 

 are rightly referred to his Z. prismafica, in the Paris collection. 



■'^ Faint traces of an oblique liue are, koweA'er, observable iu I. WomescnsJcii. 



