27 



F, X p 1 a n !i t i n o I I' i ti* ii r e s. 



Fi^'. 1. P/it/nicifens liildchrnndti. I'art of tlie lateral Ixnly- 

 -wall at tlie base of tlio hind lo^-. I, II. Ill — abdominal sejcc- 

 Mirnts. Mt— inotathorax. C — coxa of the hind les", F— its femur 

 In the soft articulatien membrane between the eoxa and the 

 femi-ir is seen an obliijue slit — the openin<»- of the bnllow tpu- 

 don (corresponding- to oto in fi[>-. 3). 



Fig. 2. Coxa of the riglit hind leg of P/u/matcus from above. 

 At the point of junction of the coxa (c) and metathorax (Mt) 

 is seen the opening of the hollow tendon (ot), corresponding 

 to oto in fig. 3. 



Fig. 3. Longitudinal section of the upper surface of the 

 coxa (c) and the adjoining parts ot the metathorax (Mt) and 

 femur (F) of the hind leg of Phymafeus. A — tracheal sacs, 

 h — chitin, m — muscles, ot — opening of the hollow tendon of 

 the soft articulation membrane between the coxa and meta- 

 thorax, oto — opening of a similar tendon (but shorter) between 

 the coxa and femur. Lens, magnified X !<'• 



Fig. 4. From a series of sections of the hollow tendon of 

 the soft articulation-membrane between the coxa and meta- 

 thorax of Phymateus (ot in fig. 3). Oto— external aperture of the 

 tendon with grains of some kind of stuff (foamy secretion? 

 in its cavity, h — chitin of the skin, t— chitin of the tendon) 

 Zeiss AA oc. 0. The figure is diminished on ^U. 



Fig. 5. Longitudinal section of the upper lateral portion 

 (above the tympanal organ) of the metathorax (Mt), I and II abdo- 

 minal segments. The slit between the first and second abdo- 

 minal segments leads into a widened cavity (o), into which 

 the dermal gland (D) secreting the foamy fluid opens (Ao). 

 A— tracheal sacs; C— chitin; F— fat-body; M— muscles; S — 

 secretion of the gland. Zeiss AA. oc. 0. The figure is dimi- 

 nished. 



Fig. 6. From the same series of longitudinal sections as in 

 fig. 5. Into the cavity (Do) between the I and II segment of the 

 abdomen opens the hollow tendon— N. The remaining deno- 

 tations are as in fig. 5. 



Fig. 7. Transverse section of the first abdominal segment 

 of Phymateus through the tympanal organ (T). Above the tym- 

 panal organ is situated part of the gland (D) discharging the 



