ALLURING OR SCENT-GLANDS 



393 



On dissecting and making microscopic sections of them, the gland is, 

 when extended (Fig. 369), seen to be a long, ensiform, sharp, band- 

 like process, with numerous retractor muscular fibres. When at rest 

 each gland is folded about five times, forming a bundle lying on each 



FIG. 869. Eversible scent-glands (a) of Hadenoecus, nat. size : Kingsley, del. ; A, a gland 

 outstretched, with the retractor muscular fibres ; t, part of the tergite. S, section of the gland, 

 showing the single layer of epithelial cells, and the muscular fibres (m). Author del. 



side of the end- of the intestine. The walls are formed of a single 

 layer of epithelium, as seen in Fig. 369, B. 



In the male of the common wingless cricket, Ceuthophilus maculatus, 

 we have discovered what appears to be a pair of scent-glands lying 

 directly over the last abdominal ganglion. They form two large 

 white sacs situated close together, with a short common duct which 

 passes back and opens externally upwards by a transverse slit on the 

 under side of the last segment of the body. 



