The pheromone gland of C. venosatus is an eyersible fold situated dorsally in the intersegmental membrane between the 8th and 9th abdominal segments and can everted completely as two-semipherical like. The glandular area shows the existence of numerous Spikes on the surface.In cross section of the invaginated gland

most of secretory cells are seen in the dorsal convoluted area. The gland consists of single lager of epithelial cell which on the interior are limited by a thin basement membrane. Basallys each cell membrane appears to have numerous projections

the cell has large ovoid nucleus. There are brush border at the apical edge of the cell. The brush border is consisted of microvilli. the outicle is divided into two regions; thick endocuticle and thin epicuticle