JO 
THE STUDY OF INSECTS. 
PLATE III. 
A Cockroach (Periplaneta orientalis). 
(From Rolleston). 
a, antennae; b\. 62, £3, tibiae; c, anal cerci; d, ganglion on recurrent nerve upon the 
crop ; e , salivary duct: y, salivary bladder; g, gizzard ; l \, hepatic coeca; 1 , chylinc 
stomach : j\ Malpighian vessels; k, small intestine; /, large intestine ; tn , rectum; 
ft- first abdominal ganglion ; o, ovary ; /, sebaceous glands. 
