88 



FOREST ENTOMOLOGY. 



be made, taking the very lucid diagrammatical plate from Judeich and 

 Nitsche. In fig. 82, a, we get a simple single-armed mother-gallery, 



Fig. 82. Typical workings of Scolytidce. 

 Single-armed mother-gallery, showing equal larval galleries and pupal recesses ; 6, short 

 mother-gallery and radiating larval galleries ; c, single-armed short horizontal mother- 

 gallery and long right-angled larval galleries ; d, double-armed horizontal mother-gallery 

 with right-angled larval galleries ; e, two-armed mother-gallery of a polygamous species ; 

 /, four-armed mother-gallery of a polygamous species ; g, five-armed mother-gallery of a 

 polygamous species ; h, star-gallery of a polygamous species ; i, ladder-gallery of a wood- 

 boring species ; k, forked mother and larval galleries ; I, an irregular ladder-gallery ; in, a 

 family gallery. Copied from Judeich and Nitsche. 



with the larval galleries radiating slightly from the mother- gallery. 



