162 Prof. J. Wood-Mason's Morpltohgical Notes 



Fie. 4. 



^Blatta,' sp. The ninth sternum of the male : st, the sternum, 

 which is colourless, or nearly so, and, when in situ, covered by 

 that of the preceding somite ; the coloured and setose portion 

 posterior to it represents the bases (protopodites) of the mem- 

 bers which have coalesced with the sternum and with one 

 another at p' in the middle line, where a narrow streak of 

 lighter coloration than the surrounding chitine marks the 

 junction ; a, the exopodites ; the endopodites (h in fig. 5) have 

 been lost in the coalescence of the basal joints of the members 

 with one another ; jjI, lateral sclerites apparently homologous 

 with those which carry the spiracles in the spiraculiferous 

 somites of the body. 



