Identify the location and function of the following glands in cockroaches:
$(i)$ Conglobate gland
$(ii)$ Collateral gland

(N/A) $(i)$ Conglobate gland:
Location: It is an accessory reproductive gland in the male cockroach,located at the ventral side of the ejaculatory duct.
Function: Its secretion forms a hard coating around the spermatophore (sperm cell bag).
$(ii)$ Collateral gland:
Location: It is an accessory reproductive gland in the female cockroach.
Function: Its secretion is responsible for the formation of the ootheca (cocoon).