24 



species of Ortliezia ; prominent ; in two series. Legs and 

 antennae pale brownish ochreous. 



In the genus Orthezinla the antennae of the adult female have 

 four joints only, and the prominent, tubular eye is fused to the 

 basal joint. The tibiae and taisi are in one piece, without recog- 

 nisable division. 



0. vejdorskiji, Sulc. (fig. 11 b). Under moss and logs of wood. 

 The median dorsal area of the adult female is naked, without 

 lamellae. 



Genera of the subfamily Maniarodinae are peculiar in containing 

 species of which the females undergo a quiescent, encysted, nymphal 

 stage, interposed between the active larval and adult stages. Another 

 peculiarity of the species in this section is that the adult females are 

 without functional mouth parts. In some of the genera the mouth 

 parts have disappeared altogether ; in others they are vestigial. In 

 the encysted nymphal stages the mouth parts are present and func- 

 tional, but limbs and antennae are entirely wanting. The males 

 may have compound eyes and a caudal tuft of silky filaments, or 

 simple eyes and a single pair of simple caudal filaments. The typical 

 genus [Man/aroiles] includes the " Ground Pearls," so called from 

 the nacreous test that encloses the encysted nymph ; but this genus 

 has not been recorded from the British Isles. Our sole representa- 

 tive of the subfamily is a species of the genus Steiiir/elia, viz. : — 



S. ijorodetskia, Nassonow. On the stems of birch trees. Mature 

 female elongate, narrow ; of a dark slaty grey colour ; subse- 

 quently secreting a conspicuous white ovisac. For the 

 purpose of oviposition tbe insect prefers to secrete itself either 

 between matted fallen leaves or in the dead and hollow stems 

 of bracken at the base of the tree. The nymph of this species 

 still awaits discovery. The male has a circle of ocelli sur- 

 rounding the head, and a single pair of long, slender waxy 

 caudal filaments. The species was originally discovered in 

 Russia. England is the only other country from which it 

 has been recorded. 



I have now reviewed all the indigenous species that, up to the 

 present time, have been recorded from the British Isles ; but I feel 

 confident that many others remain to reward a diligent search (or 

 rather searcher). Our pines, for instance, should produce several 

 species of the genera LeucoKpis and Aspidiotits which infest this tree 

 on the continent of Europe. At present, not a single Coccid has 

 been described from Piiiiis si/ln'stris in this country, though imma- 

 ture examples of an undescribed species have recently been dis- 

 covered by an enterprising member of this Society. It is hoped that 

 this interesting species will be worked out in the course of the 



