breed: metamorphosis of the muscles of a beetle. 381 



fix. pre. p-J. mt'fur. . Flexor processus postero-lateralis metafurcae. 



Jix. trchn. mCthx. . . Flexor troehanteris metathoracis. 



htfdrm Hypodermis. 



in Intestine. 



lexi'cyt Leucocyte. 



I. vis' far Musculus lateralis raesofurcae. 



;. mVnt Musculus lateralis metanoti. 



/. mVthx. a. ... Musculus lateralis metathoracis anterior. 



/. mt'thx. p. ... Musculus lateralis raetatlioracis posterior. 



loph Cross section of ridge on elytron. 



l.prc.if.ms'phg. . . Musculus lateralis processus inferioris mesophragmatis. 



ms'fur Mesofurca. 



ms'fitr. d Musculus raesofurcae dorsalis. 



tns'phg Mesophragma. 



mffur Metafurca. 



mt'nt Musculus metanoti. 



mt'phg Metaphragma. 



mu. crc Circular layer of intestinal muscles. 



mu. Ig Longitudinal layer of intestinal muscles. 



n Cross section of the main branch of the sympathetic nervous 



system. 



nl Nucleus of larval muscle fibre before division. 



jj^.i Nucleus of muscle fibre undergoing amitotic division. 



n/.2 Pairs of nuclei resulting from amitotic division. 



nL* Elongated nucleus common in metamorphosing muscles. 



nZ.* Nucleus of degenerating muscle undergoing chromatolysis. 



n/.5 Nucleus of leucocyte. 



pJi Cross section of fold on episternum. 



pre Processes of tracheal cells detached from cell body by the 



plane of the section. 



pre. ms''phg. if. . . Processus mesophragmatis inferior. 



pre. mt'phg. if. . . Processus metaphragmatis inferior. 



rlx. al. mt'lhx. . . . Relaxator alae metathoracis. 



rlx. ext. al Relaxator extensoris altfe. 



rtr. ms'thx. if. . . . Retractor mesothoracis inferior. 



rtr. prothx. if. . . . Retractor prothoracis inferior. 



sar'lem Sarcolemma. 



sar'pl Sarcoplasm. 



sty. ah. 1 .... Stigma of the first abdominal somite. 



stg. mt'thx Metathoracic stigma. 



sut. a Suture of the larval metathorax, probably equivalent to the 



suture between prescutum and scutum. 



sut. p Suture probably equivalent to the suture between the scutum 



and scutellum. 



tr Trachea. 



trl Intracellular tracheole. 



a, ;S, y, 5, €, etc. . . Larval muscles which degenerate during pupal life. 



1 Anterior lateral horn of the metafurca. 



